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3Com Switch 8800 Configuration Guide www.3com.com Part No. DUA1750-2BAA01 Published: Decem ber 2005.
Copyright © 2005, 3Com Corporation. All rights reserved. No p art of this documentation may be reproduced in any form or by any means or used to make any d erivative work (such as transl ation, transformation, or adapta tion) without written permission from 3Com Corporation.
3 About This Manual Release Notes This manual applies to 3Com Switch 88 00. Related Manuals The related manuals a re l isted in the following table. Manual Content 3Com Switch 8800 Installation Guide It provides information for the system installation, booting, hardware/software maintenanc e & monitoring.
Switch 8800 Configuration Guide About T his Manual 4 z PoE This module focuse s on p ower over Ethernet (PoE) configuration. z NAT & VPLS This module presents the config urations on NAT and VPLS. z Appendix This appendix offers the acronyms in this man ual.
Switch 8800 Configuration Guide About T his Manual 5 Convention Description selected. [ x | y | ... ] * Optional alternative items are grouped i n squ are brackets and separated by vertical bars. Many or none can be selected. # A line starting with the # sign is comments.
Switch 8800 Configuration Guide About T his Manual 6 V. Mouse operation Action Description Select Press and hold the primary mouse button (left mouse button by default).
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-1 T able of Content s Chapter 1 Produc t Over vie w ..................................................................................................... ... 1-1 1.1 Product Overview........
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-2 6.2.4 Setting the Duplex Attri bute of the Ether net Port .................................................... 6-2 6.2.5 Setting Speed on th e Ethernet Port ...............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-3 8.4.1 Creating/Deleting a VLAN Protocol Type ................................................................ 8-4 8.4.2 Associating/Dissociating a Port with/from a Protoc ol-Based VLAN ...
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-4 Chapter 13 DHCP Configurat ion ................................................................................................ 13 -1 13.1 Introducti on to DH CP ..........................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-5 15.2 Displaying and Debugging IP Perf orma nce ................................................................... 15-2 15.3 Troubleshooting IP Performance ................................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-6 18.4 Typical RIP Config uration Exam ple ............................................................................. 18-12 18.5 Troubleshooting RIP Faul ts ..............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-7 20.1.1 Terms of IS-IS Routing Prot ocol ......................................................................... 20-1 20.1.2 Two-level Structure of IS-IS Routing Protocol ................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-8 21.2.2 Configuring Basic F eatures for BG P Peer .......................................................... 21-5 21.2.3 Configuring application features of a BGP peer (g roup) ............
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-9 23.1.3 Application of Multicast ....................................................................................... 23-7 23.2 Implementation of IP Multicast............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-10 27.2.3 Configur ing the IGMP Version ............................................................................ 27-3 27.2.4 Configuring the Interval to Send IG MP Query Message ........
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-11 29.2.11 Configuri ng RP to Filter the Register Messages Sent by DR ........................... 29-7 29.2.12 Limiting the ra nge of legal BSR...............................................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-12 31.2.6 Configuring MBGP Timer .................................................................................... 31-5 31.2.7 Configuring MBGP Peer (Group) ..............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-13 36.4.2 Displaying and De bugging LD P ........................................................................ 36-10 36.5 Typical MPLS Config uration Exam ple ............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-14 38.2.7 Configuring the Time Pa rameters of a Switch .................................................. 38-19 38.2.8 Setting the Timeout Factor of a Specific Bridge........................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-15 40.2 AAA Confi guration ......................................................................................................... 40-6 40.2.1 Creating/Deleting an ISP Domain .............
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-16 Chapter 41 VRRP Configurat ion ................................................................................................ 41 -1 41.1 Introducti on to V RRP .........................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-17 43.3.2 Enabling/Disabl ing FTP Se rver ......................................................................... 43-12 43.3.3 Configuring the FTP Server Authenticati on and Authorization .
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-18 46.1.1 Setting a Name for a Swit ch................................................................................ 46-1 46.1.2 Setting the Sy stem Clock .................................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-19 47.5 SNMP Configurat ion Exampl e ....................................................................................... 47-9 Chapter 48 RMON Configurat ion .............................
3Com Switch 8800 Configurat i on Guide Table of Contents TOC-20 50.2.3 SFTP Client Configurat ion ................................................................................ 50-18 50.2.4 SFTP Configur ation Example................................
3Com Switch 8800 Configurati on Guid e Chapter 1 Product Overview 1-1 Chapter 1 Product Overview 1.1 Product Overview The Switch 8800 is a large-capacity , modular ized L2/L3 switch. It is mainly designed for broadband MAN, backbo ne, switching core and converg ence center of large-sized enterprise network and campus netwo rk.
3Com Switch 8800 Configurati on Guid e Chapter 1 Product Overview 1-2 Features Implementation IP routing Supports static routing Supports Routing Information Protocol (RIP) v1/v2 Supports Open Shortes.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-1 Chapter 2 Logging into Switch 2.1 Setting Up Configurat ion Environment Through the Console Port S t ep 1: As shown in the fi.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-2 Figure 2-3 Configure the port for connection Figure 2-4 Set communication parameters S tep 3: The switch is po wered on. Display se lf-test information of the switch and prompt you to press Enter to show the comm an d line prompt su ch as <SW8800>.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-3 2.2 Setting Up Configuratio n Environment Through T elnet 2.2.1 Connecting a PC to the Switch Through Telnet After you have c.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-4 Figure 2-6 Run T elnet S tep 4: The terminal displays “Login authent ication!” and prompt s the user to input the logon password. Af ter you input the correct password, it display s the command line prompt (such as <SW8800>).
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-5 Telnet C lient PC Telnet Server Figure 2-7 Provide T elnet Client service S tep 1: Confi gure the T elnet user name and password on the T elnet Server through the console port.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-6 Note: By default, the password is required for authent icating the Modem user to log in the switch. If a user logs in via the Modem without password, he will see the prompt “Login password has not been set !.
3Com Switch 8800 Configurati on Gu id e Chapter 2 Logging into S witch 2-7 Figure 2-9 Set the dialed number Figure 2-10 Dial on the remote PC S tep 4: Enter the preset login password on the rem ote terminal emulator and wait for the prompt such as <S W8800>.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-1 Chapter 3 Command Line Interface 3.1 Command Line Interface The Switch 8800 provide s a series of configuration comm ands and comm and line interfaces for configuring and ma naging the switch.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-2 z Management level: They are co mmands that influence basis operatio n of the system and system support module, whi ch plays a suppo rt role on service.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-3 z Route policy view z Basic ACL vi ew z Advanced ACL view z Layer-2 ACL view z Conform-level view z WRED index view z RADIUS.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-4 Command view Function Prompt Command to enter Command to exit [SW8800- Ethernet2/ 1/1] 100M Ethernet port view Key in interf.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-5 Command view Function Prompt Command to enter Command to exit PIM view Configure PIM parameters [SW8800- PIM] Key in pim in .
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-6 Command view Function Prompt Command to enter Command to exit Advanced ACL view Define the rule of advanced ACL [SW8800- acl.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-7 Command view Function Prompt Command to enter Command to exit VPN-instan ce subaddres s family view Configure VPN instance s.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-8 z Partial help Y ou can get the help information throu gh these onli ne help commands, whi ch are described as follows. 1) Input “?” in any view to get all the comm ands in it and corresp onding de scriptions.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-9 3.3.2 Displaying Charact eristics of Command Line Command line interface provides the followin g display characteristics: z For users’ convenience, the instruction and help i nformation can be di splayed in both English and Chinese.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-10 3.3.4 Common Command Line Error Messages All the input commands by users can be co rre ctly executed, if they have passed the grammar check. Othe rwise, error messages will be reported to users.
3Com Switch 8800 Configurati on Guid e Chapter 3 Command Line Interface 3-11 <Tab> Press <Tab> after typing the incomplete key word and the system will execute the parti al help: If the ke.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-1 Chapter 4 User Interface Configuration 4.1 User Interface Overview User interface configu ration is another way p rovided by the switch to configure and manage the port data.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-2 z VTY is numbered after AUX user interface. The absolute number of the first VTY is incremented by 1 than the AUX user interfa ce num be r. II. Relative number The relative number is in the format of “u ser interface ty pe” + “number”.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-3 When the users log in the switch, if a connection i s activated, the login header will be displayed. Af ter the user succes sfully l ogs in the switch, the shell header will be displayed.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-4 By default, the flow control on an a synchronous port is none, that is, no flow control will be performed.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-5 After the terminal se rvice is disabled on a user interface, you cannot log in to the switch through the user interface. Howeve r , the user logged in through the user interface before disabling the terminal service ca n continue his operatio n.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-6 IV. Setting the screen length If a command displays more than on e screen of information, you can use the followin g.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-7 By default, terminal authentication is n ot req u ired for local users log in via the Console port. However , password authentication is requi red for local users and remote Mode m users log in via the AUX port, and T elnet users log in through Ethernet port.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-8 Note: By default, password is required to be set for authe nticating local users an d remote Modem users log in via the AUX port, and Telnet user s log in through Ethernet port.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-9 Note: When a user logs in the switch, the comm and level that it can access depends on two points. One is the command level that the us er itself can access, the other is the set command level of this user interface.
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-10 4.2.6 Configuring Modem Attributes When logging in the switch via the Modem, you ca n use the following comm ands to configure these paramete rs. Perform the following configuration in AUX user interface view .
3Com Switch 8800 Configurati on Guide C hapter 4 User Interface Conf igurati on 4-11 Table 4-21 Configure to automatically run the comm and Operation Command Configure to automatically run th e comman.
3Com Switch 8800 Configurati on Guide Chapt er 5 Management Interf ace Configuration 5-1 Chapter 5 Management Interface Configuration 5.1 Management Interface Overview The Switch 8800 provides a 10/100Base-TX management interface on the Fab ric.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-1 Chapter 6 Ethernet Port Configuration 6.1 Ethernet Port Overview The Switch 8800 provides conventional Ethernet port s, fast Ethern et port s, 1000 Mbp s Ethernet port s and 10 Gb ps Ethernet po rt s.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-2 6.2.2 Enabling/Disabli ng an Ethernet Port After configuring the related p arameters and p rotocol of the port, you can use undo shut down command to enable the port. If you do not want a po rt to forward data any more, use shut down command to di sa ble it.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-3 Note that, 10/100 Mbps electrical Ethernet port can operate in full-duplex, half-duplex or auto-negotiation mode. The1 0/100/1000 Mbp s electrical Ethernet port can operate in full duplex, half duplex or auto-negotiati on mode.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-4 Operation Command Restore the default type of the cable connected to the Ethernet port undo mdi Note that, the settings only t ake ef fect on 10/100 Mbps and 10/100/1000 Mbp s electrical port s.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-5 Note that, the values can be consecutive, but the ef fective values are discrete. The effective fram e length for the FE port is 1552. The effe ctive frame length for the GE port and 10 GE port is 1552, 9022, 9192 and 10240.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-6 6.2.11 Setting the Link Type for the Ethernet Port Ethernet port can operate in three dif ferent link types, access, hybrid, and trunk types. The access port carries on e VLAN only , used for connecting to the user’s computer .
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-7 Operation Command Add the current trunk port to specified VLANs port trunk permit v lan { vlan_id_list | all } Remove .
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-8 By default, the VLAN of hybrid port and trunk po rt is VLAN 1 and that of the acce ss port is the VLAN to which it belongs 6.2.14 Setting the VLAN VPN Feature VLAN T ag consists of 12 bits (defined by IEEE802.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-9 Path cost Link attributes(point-to-point or not) Port mCheck Max transmission speed Enable/disable root protecti on En.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-10 Table 6-16 Copy port configuration to other ports Operation Command Copy port configuration to other port s copy conf.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-11 6.3 Displaying and Debugging Ethernet Port After the above configurati on, execute display command in any view to displ ay the running of the Ethernet port configuration , and to verify the ef fect of the configuration.
3Com Switch 8800 Configurati on Guide C hapter 6 Ethernet Port Configurati on 6-12 II. Network diagram Switch A Swi tc h B Figure 6-1 Network diagram for Ether net port configuration III. Configuration procedure The following configuration s are used for Sw itch A.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-1 Chapter 7 Link Aggregation Configuration 7.1 Overview 7.1.1 Introduction to Link Aggregation Link aggregation means.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-2 operation key . The mana g ement key of an LACP-enabled dyn ami c aggregation port is 0 by default. The management key of an LACP -enabled st atic aggregation po rt is the same as the aggregation g roup ID.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-3 z The system sets to inactive state the active port connecting to the different peer devices, or the port connecting to the same peer device but locating in the different aggregation group.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-4 protocol types in determining if to use IP or MAC addresses. The packet with 0800 ETYPE Ethernet field is IP p acket. In general, the system onl y provides limited resources.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-5 7.2 Link Aggregat ion Configuration The following sections descri be link aggregation t asks: z Enabling/Disabling .
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-6 z You cannot enable LACP at the mirrori ng port, the port with static MAC ad dress configured, and the port with static AR P configured, port with 802.1 x enabled. z You are inhibited to enable LACP at t he port in a manual aggre gati on group.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-7 Table 7-3 Add/delete an Ethernet port into/from an aggregation grou p Operation Command Add an Ethernet port into t.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-8 Note: If you save the current configuration using the sav e command, the static and dynamic LACP agg regation g.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-9 7.3 Displaying and Debug ging Link Aggregation After the above configurati on, execute the display command in any view to display the running of the link aggregati on configuration, and to ve rify the ef fect of the configuration.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-10 7.4 Link Aggregation Configuration Example I. Network requirements Switch A connect s switch B with three a ggregation ports, numbered as Ethernet2/ 1/1 to Ethernet2/1/3, so that incoming/outgoin g load can be balanced a mong the member ports.
3Com Switch 8800 Configurati on Guide Chapt er 7 Link Aggregation C onfiguration 7-11 Enable LACP on Ethernet port s Et hernet2/1/1 to Ethernet2/1/3. [SW8800] interface ethernet2/1/1 [SW8800-Ethernet2.
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-1 Chapter 8 VLAN Configuration 8.1 VLAN Overview Virtual local a rea net work (VLAN) g rou p s t he devices in a LAN logically , not physically , into segments to form virt ual workgrou ps.
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-2 Table 8-1 Create/Delete a VLAN Operation Command Create a VLAN and enter the VLAN view vlan vlan _ id Delete a specified VLAN undo vlan { vlan _ id [ to vlan _ id ] | all } Note that the default VLAN, namely VLAN 1, cannot be deleted.
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-3 8.2.4 Shutting down/B ringing up a VLAN Interface Y ou can use the following commands to shut do wn/bring up a VLAN interfa ce. Perform the following configuration in VLAN interface view .
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-4 8.4 Configuring Protocol-Based VLAN The following sections descri be the pr otocol-based VLAN configuration t asks: z Creating/Deleting a VLAN Protocol Type z Associating/Dissociating a Port with/from a Protocol-Base d VLAN 8.
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-5 Note: z The port to be associated with a protocol -based VLAN must be of Hybrid type and in this VLAN. z The same protocol can be configured in the different VLANs, but can not be configured repeatedly in the same VLAN.
3Com Switch 8800 Configurati on Guid e Chapter 8 VLAN Configuration 8-6 8.6 VLAN Configuration Example I. Network requirements z Create VLAN2 and VLAN3. z Add Ethernet3/1/1 and Ethernet4/1/1 to VLAN2. z Add Ethernet3/1/2 and Ethernet4/1/2 to VLAN3. II.
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-1 Chapter 9 GARP/GVRP Configuration 9.1 Configuring GARP 9.1.1 GARP Overview Generic attribute regi stration protocol (GARP) .
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-2 Note: z The value of GARP timer will be used in all the GARP application s, including GVRP and GMRP, running in one switched netwo rk. z In one switched network, the GARP timers on all the switching devices should be set to the same value.
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-3 Note that, the value of Join timer should be no less than the doubled value of Hold timer , and the value of Leave timer should be greater than the double d value of Join timer and smaller than the Leaveall timer value.
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-4 GVRP-supporting switche s can receive VLAN registratio n information from other switches and dynamically update the local VL AN registration inform ation including the active members and through which p ort t hose members can be reached.
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-5 Table 9-3 Enable/disable global GV RP Operation Command Enable global GVRP gvrp Disable global GVRP undo gvrp By default, global GVRP is disabled. 9.2.3 Enabling/Di sabling Port GVRP Y ou can use the following command to enable/disa ble the GVRP on a port.
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-6 Table 9-5 Set the GVRP registration type Operation Command Set GVRP registration type gvrp registration { normal | fixed | forbidden } Restore the default GVRP registration type undo gvrp registration By default, GVRP regi strat ion type is normal .
3Com Switch 8800 Configurati on Guide Chapter 9 GARP/GVRP Con figuration 9-7 III. Configuration procedure Configure Switch A: Enable GVRP globally . [SW8800] gvrp Set Ethernet3/1/1 as a T runk port and allo ws all the VLANs to p a ss through.
3Com Switch 8800 Configurati on Guide Chapter 10 Super VLAN Conf iguration 10-1 Chapter 10 Super VLAN Configuration 10.1 Super VLAN Overview Super VLAN is also called VLAN aggregation: A s uper VLAN cont ains multiple sub VLANs .
3Com Switch 8800 Configurati on Guide Chapter 10 Super VLAN Conf iguration 10-2 Number Item Command Description 2 Enter VLAN view [SW8800] vla n vlan _ id Required 3 Set the VLAN type to super VLAN [SW8800-vlan4093] supervlan Required. The VLAN_ID is the configured VLAN ID in the range 1 to 4,094.
3Com Switch 8800 Configurati on Guide Chapter 10 Super VLAN Conf iguration 10-3 10.2.2 Super VLAN C onfiguration Example I. Network requirements Super VLAN 10 and sub VLANs including VLAN 2, VLAN 3 and VLA N 5 need configuring. VLAN2 cont ains port 1 and 2; VLAN3 cont ains port 3 and 4; VLAN5 contain s port 5 and 6.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-1 Chapter 11 IP Address Configuration 11.1 Introduction to IP Address 11.1.1 IP Address Classi fication and Represent ation An IP address is a 32-bit add ress allocated to a device that accesses the Internet.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-2 Table 11-1 IP address cl asses and ra nge s Network class Addr ess range IP network range available Note A 0.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-3 Network class Addr ess range IP network range available Note D 224.0.0.0 to 239.255.2 55.255 None Addresses o f class D are mult icast addresses, among whi ch: z IP address 224.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-4 138.38.160.0, 138.38.192. 0 and 13 8.38.224.0 (Refer to the foll owing figure). Each subnet can cont ain m ore than 8000 ho st s. 10001010, 00100110, 000 00000, 00000000 ClassB 138.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-5 11.2.2 Configuring the IP Address of the VLAN I nterface Y ou can configure an IP address for every VLAN interface of the swi tch. Generally , it is enough to configure one IP address for an inte rface.
3Com Switch 8800 Configurati on Guide Chapter 11 IP Address Configurati on 11-6 II. Network diagram Console cable Switch PC Console cable Switch PC Figure 11-3 Network diag ram for IP ad dre ss configuration III. Configuration procedure Enter VLAN interface 1.
3Com Switch 8800 Configurati on Gu id e Chapter 12 ARP Configuration 12-1 Chapter 12 ARP Configuration 12.1 Introduction to ARP Address Resolution Protocol (ARP) is used to resolve an IP address into a MAC address.
3Com Switch 8800 Configurati on Gu id e Chapter 12 ARP Configuration 12-2 correspondi ng MAC address of Host B and adds them to it s own ARP mapping t able.
3Com Switch 8800 Configurati on Gu id e Chapter 12 ARP Configuration 12-3 12.2.2 Configuring the Dynamic ARP Aging Timer For purpose of flexible conf iguration, the system provi des the following comm ands to assign dynamic ARP aging period. Wh en the system learns a dynamic ARP entry , its aging period is based o n the current value configured.
3Com Switch 8800 Configurati on Gu id e Chapter 12 ARP Configuration 12-4 12.3 Displaying and Debugging ARP After the above configurati on, execute the display command in any view to display the running of the ARP config uration, and to ve rify the ef fect of the configuration.
3Com Switch 8800 Configurati on Gu id e Chapter 12 ARP Configuration 12-5 Table 12-5 Enable/Disab le the scheme of pr eventing attack from packets Operation Command Enable/Disable the schem e of preve.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-1 Chapter 13 DHCP Configuration 13.1 Introduction to DHCP 13.1.1 How DHCP W orks This is a world where networks are ever-growing in both size and com plexity , and the network configuration is getting more and mo re complex.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-2 z Automatic IP address assignment. The DHCP server automatically assigns fixed IP addresses to DHCP clients when they c onnect to the network for the first time. After that, the IP addresses are always occupied by the DHCP clients.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-3 z Selection. The DHCP client only receives the first arriving DHCP_ Offer packet if there are DHCP_Offer packets from several DHCP servers. Then, it retrieves the IP address carried in the packet, and bro adcast s a DHCP_Request packet to each DHCP server.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-4 13.2.1 Enabling/Di sabling DHCP Service For both DHCP serve r and DHCP relay , you must enable the DHCP service first before performing other DHCP configurations. The ot her related DHCP configurations take effect only af ter the DHCP service is enabled.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-5 Table 13-3 Configure the pro cessing method for multiple VLAN i nterfaces Operation Command Specify to forward DHCP packets t.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-6 13.3 Configuring DHCP Server The following sections descri be the DHCP server configuration ta sks: z Creating a Global DHCP .
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-7 So, you can configure the p arameters (such as d omain name) that are com mon to all levels in the address pool structure or some subnet s only for the network segment or for corresponding subnet s.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-8 Perform the following configurati on in DHCP address pool view . Table 13-6 Configure sta t ic add ress binding for a gl obal.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-9 Caution: A binding in a VLAN interfa ce address pool cann ot be overwritten directly. If an IP-to-MAC address binding entry is configured and you wa nt to modify it, you must remove it and redefine a new one.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-10 Y ou can set multiple IP addre ss ranges t hat are not assigned automaticall y by executing the dhcp server forbidden-ip command m ultiple times.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-11 Operation Command Restore the lease time of DHCP add ress pools of multiple VLAN interfaces to the default value undo dhcp s.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-12 Table 13-15 Configure a DHCP client domai n nam e for multiple VL AN inter faces Operation Command Configure a DHCP client d.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-13 Table 13-17 Configure DNS server address for current VLAN interface Operation Command Configure one or more DNS serve r addr.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-14 Table 13-19 Configure NetBIOS server address for a global DHCP address pool Operation Command Configure one or more NetBIOS .
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-15 13.3.8 Configuring NetBIOS Node T ype for DHCP Client s For DHCP clients co mmunicating in wi de area network (W AN) by NetBIOS protocol, the mapping between their host nam es an d IP addresses must be est ablished.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-16 Table 13-24 Configure a NetBIOS node type for multiple VLAN interfa ce s Operation Command Configure NetBIOS node types for .
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-17 III. Configuring custom DHCP options for multiple VLAN interfaces Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-18 the DHCP server re ceives no response af te r sending all these packet s, it considers the IP address is not used by other devices i n this network and assigns the IP address to this DHCP cli ent.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-19 Operation Command Display the information about IP address binding in DHCP address pool(s) display dhcp server ip-in-use { i.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-20 DHCP se rver , is supposed to assign IP addr esse s to the two DHCP clients without the help of any DHCP Relay . II. Network diagram E ther net DHC P cl i e n t DHC P c l i e n t 10.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-21 13.4 Configuring DHCP Relay 13.4.1 Introduction to DHCP Relay This is a world where networks are ever-growing in both size and com plexity , and the network configuration is getting more and mo re complex.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-22 z After receiving the packet, the DHCP serv er generates configuration informatio n accordingly and sends it to the DHCP cli ent through the DHCP Rel ay to complete the dynamic configuration of the DHCP client.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-23 Table 13-34 Configure user addre ss entries for DHCP server Operation Command Add a user address entry for DHCP server dhcp relay security ip_address mac_addres s static Remove a user addre ss entry for DHCP server undo dhcp relay security ip_add ress III.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-24 Operation Co mmand Disable debugging for DHCP Relay undo debugging dhcp relay { all | packet | error | event } 13.4.4 DHCP Relay C onfiguration Example I. Network requirements As shown in Figure 13-4, two DHCP client s loca ted at the same network segment (10.
3Com Switch 8800 Configurati on Guid e Chapter 13 DHCP Configur ation 13-25 [SW8800-Vlan-interface2]ip relay address 202.38.1.2 Note: Besides the above configurations for DHCP Relay, you need to c.
3Com Switch 8800 Configurati on Gu id e Chapter 14 DNS Configuration 14-1 Chapter 14 DNS Configuration 14.1 Introduction to DNS Used in the TCP/IP applica tion, Domain Na me System (DNS) is a distri buted databa se which provides the translation between domain na me and the IP addre ss.
3Com Switch 8800 Configurati on Gu id e Chapter 14 DNS Configuration 14-2 “3Com”. Then the system con nects the i nput do main name with the suf fix into “3Com.com” automatically to search. When t he domai n name suffix is used, if the input domain name does not include “.
3Com Switch 8800 Configurati on Gu id e Chapter 14 DNS Configuration 14-3 this function when you do not want to perform dynamic dom ain name resolution sometimes.
3Com Switch 8800 Configurati on Gu id e Chapter 14 DNS Configuration 14-4 14.4 Displaying and Debugging Domain Name Resolution After the abov e configurat ion, you can execute the display command in any view to view the running st ates of the domain nam e resol ution, and verify the configuration result s throu gh the displayed informatio n.
3Com Switch 8800 Configurati on Gu id e Chapter 14 DNS Configuration 14-5 III. Configuraiton procedure Enable dynamic domain name re sol ution [SW8800] dns resolve Configure the IP address of the domain name server to 172.16.1.1. [SW8800] dns server 172.
3Com Switch 8800 Configurati on Guide C hapter 15 IP Performance C onfig uration 15-1 Chapter 15 IP Performance Configuration 15.1 Configuring IP Performance IP performa n ce configuration includes: z Configuring TCP Attributes 15.
3Com Switch 8800 Configurati on Guide C hapter 15 IP Performance C onfig uration 15-2 15.2 Displaying and Debugging IP Performance After the above configurati on, execute the display command in any view to display the running of the IP performance configuration, and to verify the ef fect o f the configuration.
3Com Switch 8800 Configurati on Guide C hapter 15 IP Performance C onfig uration 15-3 Operation Command Enable the debugging of UDP connectio ns debugging udp packet [ task - id socket - id ] Disable .
3Com Switch 8800 Configurati on Guide C hapter 15 IP Performance C onfig uration 15-4 z Use the debugging tcp packet co mmand to enable the TCP debu gging to trace the TCP packets. Operations include: <SW8800> terminal debugging <SW8800> debugging tcp packet Then the TCP packet s received or sent can be checked in real time.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-1 Chapter 16 IP Routing Protocol Overview Note: A router that is referred to in the followin g or its icon represents a gene ralized ro uter or a Switch 8800 running routi ng protocols.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-2 A Route segment B C A R R Route segment R R R A Figure 16-1 The concept of route segm ent As the networks may have different sizes, the segm ent lengths connected between two different p airs of routers a re also dif fer ent.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-3 with the mask 255.255.0.0 is located will be 129.102.0.0. It is made up of several consecutive "1"s, which ca n also b e expressed in the dotted decimal format.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-4 The Switch 8800 support s the configuration of a series of dynamic routing prot ocols such as RIP , OSPF , IS-IS and BGP , as well as the static routes.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-5 Routing protocol or route type The preferen ce of th e corresponding route UNKNOWN 255 Apart from direct routing, IBGP and EBGP , the preferences of various dynamic routin g protocols can be man ually configured to meet the us er requirement s.
3Com Switch 8800 Configurati on Guide C hapter 16 IP Routing Protocol Overview 16-6 16.2.3 Routes Shared Be tween Routing Protocols As the algorithms of various routing protoc ol s are dif ferent, dif.
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-1 Chapter 17 Static Route Configuration 17.1 Introduction to Static Route 17.1.1 Static Route A st atic route is a special route configure d manually by an administrator .
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-2 there is no default route and the destination address of the p acket fails in matching any entry in the routing table.
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-3 The packet s sent to NULL interfa ce, a kind of virtual interface, will be discarded at once . This can decrease the system load. z Preference Depending on the configuratio n of prefer ence, you can achieve dif ferent route management policies.
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-4 17.3 Displaying and De bugging Static Route After the above configurati on, execute the display command in any view to display the running of the static route c onfigu ration, and to verify the effect of the config uratio n.
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-5 II. Network diagram Host 1. 1.5. 1 1.1.5. 2/2 4 1.1.2. 2/ 2 4 1.1.2. 1/2 4 1.1.1. 2/ 2 4 Host 1. 1.1. 1 Host 1. 1.4. 2 1.1.3. 1/ 2 4 1.1.3. 2/ 2 4 1.1.4. 1/2 4 Sw i tc h A Sw i tch B Sw i tch C A C B Host 1.
3Com Switch 8800 Configurati on Guide C hapter 17 Static Route Configurati on 17-6 17.5 Troubleshooting Static Route Faults Symptom : The switch is not configured with the dynamic routing protocol and both the physical status an d the link layer protocol st atus of the interfac e is UP , but the IP p ackets cannot be forwarded normally .
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-1 Chapter 18 RIP Configuration 18.1 Introduction to RIP Routing Information Protocol (RIP) is a relative ly simple interior gateway protocol (IGP), which is mainly applied to small scale networks.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-2 z Period update is triggered peri odically to send all RIP routes to all neighb ors. z If the RIP route is not updated (a router receives t he update packets from the neighbor) when the Timeout timer expires, this route is regarded as unreach able.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-3 If the link, which does not support broadc ast or multicast packet s, runs RIP , you need to configure RIP to send any p acket to the specified destination , establi shing RIP neighbors correctly .
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-4 Table 18-2 Enable RIP Interface Operation Command Enable RIP on the specified network network netwo rk - address Disable RIP o.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-5 Table 18-4 Configure Split Hori zon Operation Command Enable split horizon rip split-horizon Disable split horizon undo rip split-horizon By default, split horizon of the interface is enabled.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-6 Perform the following configuration in RI P view . Table 18-6 Configure RI P to import routes of other protocols Operation Com.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-7 II. Configuring RIP to filter the routes advertised by RIP Table 18-8 Configure RI P to filter the advertised ro utes Operatio.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-8 18.2.9 Enabling RIP-2 R oute Aggregation Function The so-called route aggre gation means that di f ferent subnet routes in the same natural network can be aggregated into o ne natural mask rou te for transmission when they are sent to the outside (i.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-9 broadcast packet s. In additi on, this mode can also make th e host s running RIP-1 avoid incorrectly receiving and p rocessing the rout e s with subnet mask in RIP-2. Wh en an interface is running in RIP-2 bro ad cast mode, the RIP-1 p a ckets can also be received.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-10 always become un reachable at the point whe n a new pe riod st arts, the a ctual value of Garbage-collection timer is three to f our times that of Period Updat e timer .
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-11 Operation Command Enable the interface to send RIP update packet rip output Disable the interface to send RIP update packet undo rip output The undo rip work command and the undo network command hav e similar but not all the same functions.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-12 18.3 Displaying and Debugging RIP After the above configurati on, execute the display command in any view to display the running of the RIP configuration, and to veri fy the ef fect of the configuration.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-13 II. Network diagram Ethernet 110.11.2.2/24 Network address: 117.102.0.0/16 Network address: 196.38.165.0/24 Interface address: 110.11.2.1/24 Interface address: 117.102.0.1/16 Interface address: 155.
3Com Switch 8800 Configurati on Gu id e Chapter 18 RIP Configuration 18-14 [Switch C-rip] network 110.11.2.0 18.5 Troubleshooting RIP Faults Symptom : The Switch 8800 cannot receive the update p acket s when the physical connection to the peer routing device is norm al.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-1 Chapter 19 OSPF Configuration 19.1 OSPF Overview 19.1.1 Introduction to OSPF Open Shortest Path First (OSPF) is an Interior Gateway Protocol based on the link state develo ped by IETF .
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-2 z A router uses the SPF algorithm to calculate the sh ortest path tree with itself as the root, which shows the route s to the node s in the autonomous system. The external routing information is the leave node.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-3 19.1.4 LSA Type I. Five basic LSA types As mentioned previously , OSPF calculates and maint ains routin g information from LSAs. RFC2328 defines five LSA types as follows: z Router-LSAs: Type-1.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-4 II. DR and BDR z Designated Router (DR) In multi-access network s, if any two routers establi sh adjacencies, the same LSA will be transmitted repeatedly , wasting bandwidt h resour ces.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-5 Since all the areas sho uld be connected to the backbone area, virtual lin k is adopted so that the physically separated areas can still maint ain the logic connectivity to the backbone area.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-6 z Authenticator: OSPF provides clear t e xt authenticator and MD5 encryption authenticator to authenticate packet s tran smitted between neighb oring routers in the same area.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-7 z Configuring to fill the MTU field when an interfa ce tra nsmit s DD packets z Setting an SPF calculation interval for OSPF 4.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-8 By default, OSPF is disabled. When enabling OSPF , pay attention to the following points: z The default OSPF process ID is 1. If no process ID is spe cified in the command, the default one is adopted.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-9 19.2.5 Configuring O SPF to Import Routes of Other Protocols The dynamic routing protoc ols on the router ca n sh are the routing information. As far a s OSPF is concerned, the routes discov ered by other routing protocol s are always processed as the external routes of AS.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-10 The routes that can be imported incl ude Dire ct, S tatic, RIP , IS-IS, or BGP and in addition, the routes of other OSPF processes. Note: z It is recommended to configure the impor ted route type, cost and tag for the import-route command si multaneo usly.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-11 III. Configuring the default interval and number for OSPF to import external routes OSPF can import the external routin g information and broadcast it to the entire autonomous system.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-12 z The broadcasting scope of Type-5 LS A or Type-7 LSA advertising the default route is the same as that of the common Type-5 LSA or Type-7 LSA. Perform the following configuration in OSPF view .
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-13 By default, OSPF will not filter t he received routi ng information. II. Configuring filtering the routes imp orted to OSPF Use the filter-policy export command to configure the ASBR router to filter the external routes imported to OSPF .
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-14 aggregate segment specifi ed by the command will not be transmit ted separatel y .
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-15 19.2.9 Setting OSPF Route Preference Since maybe multiple dynamic ro uting protocols are running on on e router concurrently , the problem of route shari ng and selection betwee n various routing protoco ls occurs.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-16 II. Setting a dead timer for the neighboring routers The dead timer of neigh boring routers ref ers to the interval in which a router will regard the neighboring ro uter as dead if no Hello pa ck et is received from it.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-17 19.2.11 Configuring the Network Type on the OSPF Interface The route calculation of OSPF is based upon the topology of the adjacent network of the local router . Each router describes the topology of its adjacent network and transmits it to all the other routers.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-18 Table 19-17 Configure a netwo rk type for an OSPF i nterface Operation Command Configure the network type on the interfa ce o.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-19 If DR fails due to some fault s, the routers on the ne twork must elect a new DR an d synchronize with the ne w DR. The process will take a relati vely long time, during which, the route calculation is incorrect.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-20 19.2.14 Configuring an Interval Required for Sending LSU Packets T rans-delay seco nds should be added t o the agi ng time of the LSA in an LSU packet. Setting the parameter like this mainly consid ers the time duratio n that the interface requires for transmitting a packet.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-21 Table 19-22 Configure whether the MT U field will be filled in when an interface transmits DD pac ket s Operation Command Ena.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-22 By default, all interfaces are allowed to transmit and receive OSPF p acket s. After an OSPF interface is set to be in silent status, the interface can still advertise it s direct route.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-23 Operation Command Disable the interface to use MD5 authentication undo ospf authentication-mode md5 By default, the interface is not configured wi th either simple authentication or MD5 authentication.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-24 Table 19-27 Configure an OSPF virtual link Operation Command Create and configure a virtual link vlink-peer router - id [ hel.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-25 Table 19-28 Configure stub are a of OSPF Operation Command Configure an area to be the stub area stub [ no-su mmary ] Remove .
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-26 Perform the following configuration in OSPF area vie w . Table 19-29 Configure NSSA of OSPF Operation Command Configure an ar.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-27 By default, MIB is bound to the first enabled OSPF process. II. Configuring OSPF TRAP Y ou can configure the switch to send multiple types of SNMP TRAP packet s in case of OSPF anomalies.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-28 19.3 Displaying and Debugging OSPF After the above configurati on, execute the display command in any view to display the running of the OSPF configuration, and to veri fy the ef fect of the configuration.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-29 Operation Command Disable OSPF event debugging undo debugging ospf event Enable OSPF LSA packet debugging debugging ospf lsa-.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-30 III. Configuration procedure Configure Switch A [Switch A] interface Vlan-interface 1 [Switch A-Vlan-interface1] ip address 196.1.1.1 255.255.255.0 [Switch A-Vlan-interface1] ospf dr-priority 100 [Switch A] router id 1.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-31 Change the priority of Switch B to 200 [Switch B-Vlan-interface2000] ospf dr-priority 200 On Switch A, execute the display osp f peer command to show its OSPF neighbo rs. Note the priority of Switch B has chan ged to 200, but it is still not the DR.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-32 III. Configuration procedure Configure Switch A [Switch A] interface Vlan-interface 1 [Switch A-Vlan-interface1] ip address 196.1.1.1 255.255.255.0 [Switch A] router id 1.1.1.1 [Switch A] ospf [Switch A-ospf-1] area 0 [Switch A-ospf-1-area-0.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-33 19.5 Troubleshooting OSPF Faults Symptom 1 : OSPF has been configured in ac cordance with the earlie r-mentioned steps, but OS PF on the rou ter cannot run normally . Solution : Check accordin g to the following p rocedure.
3Com Switch 8800 Configurati on Guid e Chapter 19 OSPF Configuration 19-34 As shown in Figure 19-5: RT A and RTD are configured to belon g to only one area, whereas R TB (area0 and a rea1) and R TC (area1 an d area 2) are configured to belong to two areas.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-1 Chapter 20 Integrated IS-IS Configuration 20.1 Introduction to Integrated IS-IS Intermediate System-to-Intermediat.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-2 II. Link types IS-IS routing protocol is applied to IS-IS routing protocol can run on p oint to point Links, such as PPP , HDLC and others. IS-IS routing protocol can also run on broa dcast links, such as Ethernet, T oken-Ring and others.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-3 ES Routing Domain Boundary IS-IS Area End system Subnetwork Path Level 1 IS-IS Routing Level 2 IS-IS Routing Inter.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-4 20.1.3 NSAP Structure of IS-IS Routing Protocol I. Address structure AFI IDI High Order DSP SyStem ID SEL (1 octet) DSP IDP Area Address Figure 20-2 NSAP structure OSI adopts the addre ss structure as shown in Figure 20-2.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-5 z SEL NSAP sele ctor (SEL or N-SEL) functions as the protocol identifier of an IP address. Differe nt transmission protocol s correspond to dif ferent identifiers. All the SELs of IP are 00.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-6 III. SNP Sequence Number Packet (SNP ) can confirm the LSPs last received from neighbors. SNPs function as acknowledge p acket s, but SNPs function m ore validly . SNP in cludes complete SNP (CSNP) and partial SNP ( PSNP).
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-7 Enabling IS-IS on the Specified Interface z Setting Priority for DIS Election z Setting Router Type z Setting Inte.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-8 Configuring IS-IS Route Metric Type z Setting IS-IS Link State Routing Cost z Configuring IS-IS Timers z Setting t.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-9 Delete a NET undo network-entity network - entity - title The format of the network - entity - title argument is X…X.XXXXXXXXXXXX.XX, a mong which the first “X…X” is the area address, the twelve Xs in the middle is the System ID of the router .
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-10 20.2.3 Enabling IS-IS on the Specified Interface After enablin g IS-IS, you need to specif y on which Interfaces the IS-IS will be run. Perform the following configuration in int erfa ce view .
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-11 Table 20-5 Set the router type Operation Command Set the router type is-level { level-1 | level-1-2 | level-2 } Restore the default router type undo is-level By default, the router type is level-1-2 .
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-12 Table 20-7 Import routes of other prot ocols Operation Command Import routes of other protocols import-route prot.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-13 protocol specifies the routing prot ocol sources for advertisin g routes, which can be direct, static, rip, bgp, o spf, osp f-ase, an d so on.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-14 By default, the system disables route summari zation. 20.2.11 Setting to Generate Default Route In the IS-IS route domain, the Level-1 router only has the LSDB of the local area, so it can only generate the routes in the local areas.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-15 20.2.13 Configuring IS-I S Route Metric Type IS-IS routing protocol has two styles of route metric: z Narrow: The value of route metric rang e s from 1 to 63. z Wide: The value of route metric ranges from 1 to 16,777,215.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-16 Perform the following configuration in int erfa ce view . Table 20-16 Set the Hello packet broadcast interval Operation Command Set Hello packet interval, measu red in seconds.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-17 Table 20-18 Set the LSP packet transmission interval Operation Command Set LSP packet interval on the interface, measured in milliseconds.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-18 By default, the number of the invalid Hello packet s is set to 3. If this command does not specify Level-1 or Lev el-2, the system reg ard the invalid Hello packet s are set for both Level-1 an d Level-2 routers.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-19 Table 20-22 Set IS-IS authentication password Operation Command Set authentication-mode password area-authenticat.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-20 Table 20-24 Set the mesh group of the interfa ce Operation Command Add an interface to a mesh group isis mesh-gro.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-21 Table 20-26 Set to discard the LSPs with checksum errors Operation Command Set to discard the LSP with checksum error ignore-lsp-checksum-error Set to ignore the LSP checksum error undo ignore-lsp-check sum-error By default, the LSP checksum error is ignored.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-22 Perform the following configuration in IS-IS view . Table 20-29 Set Lifetime of LSP Operation Command Set lifetime of LSP timer lsp-max-age second s Restore the default LSP lifetime undo timer lsp-max-age By default, LSP can live for 120 0 se conds (20 minutes).
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-23 By default, SPF calculation is not divid ed into slices but runs to the end once, which can also be implemented by setting the seconds argument to 0. After slice cal culation is set, the routes that are not processed once will be calculated in one second.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-24 The silent-interface com mand is only used to restrain the IS-IS p ackets not to be sent on the interface, but the inte rface routes can still be sent from other interfaces.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-25 Display IS-IS SPF calculation log display isis spf-log Display IS-IS routing information display isis route Displ.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-26 II. Network diagram Switch A Switch B Switch C 100.20.0. 2/24 Vlan-i nterf ace 100 Switc h D Vlan-i nterf ace 102.
3Com Switch 8800 Configurati on Guide Chapt er 20 Integrated IS-IS Configuration 20-27 Configure Switch C [Switch C] isis [Switch C-isis] network-entity 86.0001.0000.0000.0007.00 [Switch C] interface vlan-interface 101 [Switch C-Vlan-interface101] ip address 200.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-1 Chapter 21 BGP Configuration 21.1 BGP/MBGP Overview 21.1.1 Introduction to BGP Border gateway protocol (BGP) is an inte r-autonomous sy stem (inter-AS) dynamic route discovery protocol.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-2 BGP run s on a route r in any of the following modes: z Internal BGP (IBGP) z External BGP (EBGP) The BGP i s called IBGP when it runs in an AS and EBGP when it runs among di f ferent ASs.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-3 z A BGP speaker does not advertise the r outes obta ined from IBGP to its IBGP peers. z A BGP speaker advertises the routes obtai ned from IBGP to it s IBGP peers (In th e Switch 8800, BGP and IGP are asynchronous.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-4 z MP_REACH_NLRI: Multiprotocol Reach able NLRI, used to advert ise reachable routes and the next hop information. z MP_UNREACH_NLRI: Multiprotocol Unrea chable NLRI, used to delete unreachable routes.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-5 z Configuring application feature s of a BGP peer (group) z Configuring Route Filtering of a Peer (g ro up) 3) BGP route confi.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-6 Perform the following configurations in BGP view . I. Creating a peer group A BGP peer must bel ong to a peer group. Before con figuring a BGP peer , a peer group to which the peer belongs must be created first.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-7 Delete a pe er undo peer peer - address If you want to add a peer to an IBGP peer group, this comma nd cannot specify AS numbers.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-8 higher than the timer command that is used to configure timers for the whole BGP peers.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-9 Table 21-9 Configure to permit conne ctions with EBGP peer groups o n indi rectly connected networks Operation Command Configu.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-10 After you use the peer default-r oute-advertise com mand, the local router will send a default route with the next hop as itself to the peer unconditionally , even if there is no default route in BGP routin g table.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-11 Table 21-14 Configure to send the co m munity attributes to a peer group Operation Command Configure to send the communit y a.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-12 IX. Configuring BGP MD5 authentification p assw ord BGP use s TCP as it s transport layer . For the sake of high security , you can configure MD5 authentication p assword when setting up a TCP con nection.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-13 Operation Command Configure the egress route policy for a peer group peer group - name route-policy route - policy - name export Remove the egress route policy of a peer group undo peer group - nam e route-policy route - policy - name export II.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-14 IV. Configuring route filtering policy based on address prefix list for a peer (group) Table 21-21 Configure rout e filtering.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-15 Table 21-23 Import IGP routing information Operation Command Configure BGP to import routes of IGP protocol import-route prot.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-16 Table 21-25 Configure BGP route sum marization Operation Command Configure the summary automatic function of the subnet route.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-17 II. Configuring to filter the routes advertised by the BGP Perform the following configuration in the BGP view .
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-18 suppressed. With time going, the penalty value will decrease according to power function, and when it decreases to certain specifi c threshol d, the route suppression will be eliminated and the route will be re-advertised.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-19 The ebgp - val ue , ibgp - val ue and local - value argume nt s are in the range of 1 to 256.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-20 By default, the local preference is 100. 21.2.13 Configuring MED for AS Multi-Exit Discriminators (MED) attribute is t he external metric for a route.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-21 21.2.15 Configuring BGP Route Reflector T o ensure the interconnection between I BGP peers, it is necessary to est ablish a fully connected network. If there are man y IBGP peers, larg e overhead is needed to establish a fully connected network.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-22 By default, the route reflection between client s is allowed. If the clients are fully connected, for the purpose of overhead re ductio n, it is re commended to use the undo reflect bet ween-clients co mmand to di sable the route reflection betwee n clie nts.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-23 Table 21-37 Configure confede ration_ID Operation Command Configure confederation_ID confederation id as - number Cancel confederation_ID undo confederation id By default, the confederation_ID is not configured.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-24 By default, the configured confederatio n is consistent with RFC1 96 5. 21.2.17 Clearing BGP Connection After the user ch anges BGP policy or protoc ol configuration, they must cut off the current connection so as to enable the n ew configu ration.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-25 Table 21-42 Display and debug BGP Operation Command Display the routing information in BGP routing table display bgp routing-.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-26 Operation Command Enable/Disable BGP Keepalive debugging [ undo ] debugging bgp keepalive [ receive | send ] [ verbose ] Enab.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-27 II. Network diagram AS200 AS100 AS1002 AS1001 AS1003 Ethernet 172.68.10.1 172.68.10.2 172.68.10.3 172.68.1.2 172.68.1.1 156.10.1.1 156.10.1.2 Switch A Switch B Switch C Switc h D Switch E Figure 21-2 Network diagram for AS co nfede ration configuration III.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-28 Configure Switch C: [Switch C] bgp 1003 [Switch C-bgp] confederation id 100 [Switch C-bgp] confederation peer-as 1001 1002 [S.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-29 [Switch A-Vlan-interface100] quit [Switch A] bgp 100 [Switch A-bgp] network 1.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-30 Using the display bgp routing-t able command, you can view BGP routing t able on Switch B. Note: Switch B has known the existence of network 1.0.0.0. Using the display bgp routing-t able command ,you can view the BGP routing t able on Switch D.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-31 [Switch A-bgp] group ex193 external [Switch A-bgp] peer 193.1.1.2 group ex193 as-number 200 [Switch A-bgp] quit Configure the MED attribute of Switch A z Add ACL on Switch A, enable network 1.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-32 [Switch C-Vlan-interface3] ip address 193.1.1.2 255.255.255.0 [Switch C] interface vlan-interface 5 [Switch C-Vlan-interface5] ip address 195.1.1.2 255.255.255.0 [Switch C] ospf [Switch C-ospf-1] area 0 [Switch C-ospf-1-area-0.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-33 z Define the route policy with the name of lo calpref, of those, the local preferen ce matching ACL 2000 is set as 200, and that of not matching is set as 100.
3Com Switch 8800 Configurati on Gu id e Chapter 21 BGP Configuration 21-34 covering large network segment ca nnot be im ported. For example, route 10.1.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-1 Chapter 22 IP Routing Policy Configuration 22.1 Introduction to IP Routing Policy When a router adverti ses or r.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-2 II. ip-prefix The function of the ip-prefix is simila r to that of the acl, but it is more flexible and easy for the users to understan d.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-3 Configuring ip-p refix z Configuring the AS Path List z Configuring a Community Attribute List Note: For the configuration of ACL, refer to the QoS/ACL operation part o f this manual.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-4 satisfies all th e if-match clauses of the node, it will be denied by the nod e and will not take the test of the next node. If not, howeve r , the route will take the test of the next node.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-5 Operation Command Cancel the matched next-hop of the routing information set by ACL undo if-match ip next-hop Ca.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-6 Operation Command Set the next-hop address of the routing information apply ip next-hop ip - addre ss Cancel the.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-7 22.2.2 Configuring ip-prefix z A prefix-list is identified by an ip - prefix - name . Each IP prefix-list may include multiple entries each specifying an IP prefix matching range.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-8 22.2.4 Configuring a Co mmunity Attribute List In BGP , community attribute is optional and transitive. Some community attributes known globally are call ed standa rd community attributes.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-9 Operation Co mmand Cancel the setting for importing routes of other protocols undo import-route protocol By default, the routes discovered by ot her protocols will not be advertised.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-10 Table 22-9 Configure to filter the advertised routes Operation Command Configure to filter the routes advertise.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-11 22.4 Typical IP Routing Po licy Configuration Example 22.4.1 Configuring to Filter the Received Routing Information I. Network requirements z Switch A communicates with Switch B , r unning OSPF protocol.
3Com Switch 8800 Configurati on Guide Chapt er 22 IP Routing Polic y Configuration 22-12 2) Configure Switch B: Configure the IP address of VLAN interface. [Switch B] interface vlan-interface 100 [Switch B-Vlan-interface100] ip address 10.0.0.2 255.0.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-1 Chapter 23 IP Multicast Overview Note: An Ethernet switch functions as a router whe n it runs IP multicast pr otocol. A router that is referred to in the following represents a generalized router or a layer 3 Ethernet switch running IP multicast proto col.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-2 over the network if there is a large num ber of users in need of thi s infomration. As the bandwidt h wo uld turn short, the unicast mode i s inca pable of massive tran smi ssion.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-3 Se r v e r Mu lt i cas t Us e r A Us e r B Us e r D Us e r E User C Se r v e r Mu lt i cas t Us e r A Us e r B Us e r D Us.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-4 z Occasional communication for trainin g and coop eration z Data storage and finance (stock) ope ration z Point-to-multipoint data distribution With the increasing popularity of multimedia servic es over IP network, multi cast is gaining its marketplace.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-5 Table 23-1 Range s and meani ngs of Class D add resses Class D address range Description 224.0.0.0 ∼ 224.0.0.255 Reserved multicast addresses (addresses of permanent group s).
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-6 Class D address range Description …… …… II. Ethernet Multicast MAC Addresses When a unicast IP p acket i s transmitted on the Ethernet, the destination MAC ad dre ss is the MAC address of the receiver .
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-7 Server Multicast User D User E Us e r C IGMP IGM P User A User B IGMP MBGP/MSDP PIM PIM AS1 AS2 Figure 23-5 Application positions of m ulticast-related protocols I.
3Com Switch 8800 Configurati on Guid e Chapter 23 IP Multicast Overvie w 23-8 uses the source addre ss of a received mult icast p acket to query the unicast routing table or the independe nt multicast routing tabl e to determin e that the receiving interface is on the shortest path from the receiving st at ion to the source.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-1 Chapter 24 IGMP Snooping Configuration 24.1 IGMP Snooping Overview 24.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-2 Internet / Intranet Vide o stre am VOD Serv er Layer 2 Ethernet Switch Video stream Multicast group member Non-multi.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-3 II. Implement Layer 2 multicast with IGMP Snooping The Ethernet switch runs IGMP Snooping to listen to the IGMP messages and map the host and its p orts to the co rresponding multicast group address.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-4 forwarding ta ble, and meanwhile creates an IP multicast group and adds the port received the report message to it.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-5 Table 24-1 Enabling/Di sabling IGMP Snooping Operation Command Enable/disable IGMP Snooping igmp-snooping { enable | disable } By default, IGMP Snooping is disa bled.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-6 Table 24-3 Configuri ng the maximum response time Operation Command Configure the maximum response time igmp-snooping max-response-tim e seconds Restore the default setting undo IGMP-snooping max-response-time By default, the maximum response time is 1 seconds.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-7 Caution: If IGMP snooping is not enabled o n the VLAN (nor Layer 3 multicast), unkn own multicast packets are broadcasted within t he VLAN no matter whether this function is enabled or not.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-8 T o implement IGMP Snooping on the switch, you need to ena ble IGMP Snooping on the switch first. The switch is connected with the router via the router port , and connected with user PC through the n on-router port s.
3Com Switch 8800 Configurati on Guide Chapt er 24 IGMP Snooping Configurati on 24-9 z If IGMP Snooping is not enabled, input the igmp-snooping enable command in system view to enable IGMP Snooping. Then, use the same command in VLAN view to enable IGMP Snooping in the corresp ondi ng VLAN.
3Com Switch 8800 Configurati on Guide C hapter 25 Multicast VLAN Config urati on 25-1 Chapter 25 Multicast VLAN Configuration 25.1 Multicast VLAN Overview Based on the current multicast on demand, whe n users in dif ferent VLANs request the service, multicast flow is duplicated in e ach VLAN and a great deal of band wid th is wasted.
3Com Switch 8800 Configurati on Guide C hapter 25 Multicast VLAN Config urati on 25-2 Item C ommand Description Add ports to correspondi ng VLANs port hybrid vlan vlan_id_list untagged Required T o cancel the configurations, use the corresponding undo comman ds.
3Com Switch 8800 Configurati on Guide C hapter 25 Multicast VLAN Config urati on 25-3 II. Network diagram PC 2 PC 2 PC 2 PC 2 PC 1 PC 1 PC 1 PC 1 Sw i t c h A PC 2 PC 2 PC 2 PC 1 PC 1 PC 1 PC 1 Sw i t.
3Com Switch 8800 Configurati on Guide C hapter 25 Multicast VLAN Config urati on 25-4 2) Configure Switch B Enable IGMP Snoopin g. <Switch B> system-view [Switch B] igmp-snooping enable Enable IGMP-Snooping on VLAN 2 and VLAN 3.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-1 Chapter 26 Common Multicast Configuration 26.1 Introduction to Common Multicast Configuration The multicast common configuration is fo r both the multicast group management protocol and the multicast routing protoc ol.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-2 26.2.2 Configuring multi cast route number limit Because too many multicast routes may ex haust the router memory , you need to limit the number of multicast routes.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-3 26.3 Controlled Multicast Configuration 26.3.1 Controlled Mu lticast Overview The controlled multicast feature co ntrols user’s authority to join mu lticast grou ps.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-4 Caution: In local user view, before executing thi s command, you must configure use r service type to LAN-ACCESS, which is the only one supported by controlled multicast at present.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-5 [SW8800-GigabitEthernet2/1/1] dot1x [SW8800-GigabitEthernet2/1/2] dot1x Configure the authentication mode on the cont rolle d port s to port-based mode.
3Com Switch 8800 Configurati on Guide C hapter 26 Common Multicas t Configur ation 26-6 Operation Command Enable multicast kernel routin g debugging debugging multicast kernel-routing Disable multicas.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-1 Chapter 27 IGMP Configuration 27.1 IGMP Overview 27.1.1 Introduction to IGMP Internet Group Management Protocol (IGM P) is a protocol in the TCP/IP suite responsible f or management of IP multicast members.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-2 address is ele cted as the querier when there are multiple multicast routers on the same network segment. II. Leaving group mechanism In IGMP V ersion 1, hosts leave the mult icast group quietly wi thout informing the multicast router .
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-3 27.2.1 Enabling Multicast Only if the multicast function is enabled can the multicast-related configuration s take effect. Refer to Chapter 26 Common Multicast Configu ratio n. 27.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-4 27.2.4 Configuring the Inter val to Send IGMP Query Message Multicast routers send IGMP query messages to discover which multicast groups are present on att ached networks.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-5 I. Configuring interval for querying IGMP packets Table 27-4 Configuri ng i nterval for querying IGMP pa ckets Operation Comma.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-6 maximum response time. When any timer becomes 0, the host will send the membership report message of the multicast gro up. Setting the maximum response time reasonably can enable the host to respond to query messages quickly .
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-7 Configuring one interfa ce of the router as multicast member can avoid such problem. When the interface receives IGMP que ry p acket, the router will respond, thus en suring that the network segment where the interfa c e located can normal ly receive multicast pack et s.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-8 Table 27-10 Limiting multicast group s an interface can access Operation Command Limit the range of allowed multicast groups o.
3Com Switch 8800 Configurati on Guid e Chapter 27 IGMP Configuration 27-9 27.3 Displaying and Debugging IGMP After the above configurati on, execute display command in any view to displ ay the running of IGMP configuration, and to verify the effect of the configuration.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-1 Chapter 28 PIM-DM Configuration 28.1 PIM-DM Overview 28.1.1 Introduction to PIM-DM PIM-DM (Protocol Indepe ndent Multicast, Dense Mode) bel ongs to dense mode multicast routing protocols.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-2 During this process, PIM-DM uses the RPF check and the existing unica st routing table to build a multicast forwarding tree rooted at the dat a source. When a packet arrives, the router will first judge the correctne ss of the pat h.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-3 IV. Graft When the pruned downstre am node needs to be restored to the fo rwarding st ate, the node will send a graf t packet to inform the up stream node.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-4 28.2.3 Configuring the Time Inter vals for Ports to Send Hello Packets When protocol indepe ndent multicast (PIM) protocol is enabled f or a port, the port sends Hello packet s peri odically .
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-5 28.2.5 Configuring the Filtering of Multicast Source/Group You can set to filter the source (and group) address of multicast d ata p ackets v ia this command.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-6 Table 28-6 Configuri ng the maximum number of PIM neighbor on an interface Operation Command Configure the maximum number of.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-7 Table 28-9 Displaying and debu gging PIM-DM Operation Command Display the PIM multicast routing table display pim routing-ta.
3Com Switch 8800 Configurati on Guid e Chapter 28 PIM-DM Configuration 28-8 Lan s w it ch3 Lan s w it c h1 RECE IVER 1 Lan s w it c h2 VL AN 1 0 VL AN 1 1 VL AN 1 2 M ult ic as t Sou rce RE CE I V ER .
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-1 Chapter 29 PIM-SM Configuration 29.1 PIM-SM Overview 29.1.1 Introduction to PIM-SM PIM-SM (Protocol Independent Multic ast, S parse Mode) belongs to sp arse mode multicast routing protocols.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-2 I. Build the RP shared tree (RPT) When host s join a multicast group G , the leaf routers that directly connect with the hosts send IGMP message s to learn the receivers of multicast group G .
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-3 It should be noted that one RP can serve mult iple multica st groups or all multicast groups. Each multicast group can only be uniqu ely correspond ent to one RP at a time rather than multiple RPs.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-4 It should be noted that at least one router in an entire PIM-SM domain should be configured with Candidate- RPs and Candidate-BSRs. 29.2.1 Enabling Multicast Refer to Chapter 26 Common Multicast Configu ratio n.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-5 At first, each candidate BSR conside rs itself a s the BSR of the PIM-SM domain, and sends Boot strap message by t aking the IP address of the interface as the BSR address.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-6 Operation Command Remove the candidate-R P configur ed undo c-rp { interface-type interface-number | all } When configuring RP , if the range of the se rved multicast group is not specified, the RP will serve all multicast group s.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-7 By default, no domain border is set. After th is configuration is performed, a bo otstrap message can not cross the border but other PIM p ackets can. This config uration can effectively divide a network into domain s using dif ferent BSRs.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-8 Perform the following configuration in PIM view . Table 29-7 Limiting the range of legal BSR Operation Command Set the limit.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-9 Table 29-9 Displaying and debu gging PIM-SM Operation Command Display the BSR information display pim bsr-info Display the R.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-10 II. Networking diagram LSD LS_B LS_C LS_A Host A Host B VLAN11 VLAN12 VLAN10 VLAN10 VLAN11 VLAN12 VLAN12 VLAN10 VLAN11 LSD LS_B LS_C LS_A Host A Host B VLAN11 VLAN12 VLAN10 VLAN10 VLAN11 VLAN12 VLAN12 VLAN10 VLAN11 Figure 29-2 PIM-SM configuration net working III.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-11 [SW8800-vlan-interface12] quit 2) Configure LS_B Enable PIM-SM. [SW8800] multicast routing-enable [SW8800] vlan 10 [SW8800-.
3Com Switch 8800 Configurati on Guid e Chapter 29 PIM-SM Configuration 29-12 Enable PIM-SM. [SW8800] multicast routing-enable [SW8800] vlan 10 [SW8800-vlan10] port ethernet 2/1/2 to ethernet 2/1/3 [SW.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-1 Chapter 30 MSDP Configuration 30.1 MSDP Overview 30.1.1 Introduction Multicast source discovery protocol (MSDP) is used to discover multicast sou rce information in other PIM-SM domains.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-2 30.1.2 Working Principle I. Indentifying multicast sour ce and receiving multicast data As shown in Figure 30-1, the RPs of PIM-SM dom ains 1, 2 and 3 establi sh peer relationship between them.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-3 this case, the last hop router connected with the gro up member in domai n 3 can choose whether to switch to SPT.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-4 case when the messa ge is from Switch E to Switch F, i t is received and forwa rded to other peers.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-5 30.2.2 Configur ing MSDP Peers T o run MSDP , you need to configure MSDP peers locally .
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-6 rp-policy parameter are configured, any peer that receives an SA message will forward it to the other peers. z Not using the rp-policy parameter universally: According to the config uration sequence, only the first static RPF peer wh ose connection state is UP is activated.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-7 30.2.6 Configuring the Maxi mum Number of SA caching T o prevent DoS (Deny of Service) attacks, you can set the m aximum number of SAs cached on the router . Perform the following configuration in M S DP view .
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-8 qualified (S, G) entries in the multicast rout ing table when creating SA message s, that is, to control the (S,G) entries imported from the multica st routin g t able to the domain.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-9 I. Using MSDP outbound filter MSDP outbo und filter of are function al in: z Filtering off all the (S, G) entries z Forwarding only the SA messages permitted by the advanced A CL Please perform the following configurations in MSDP view .
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-10 Table 30-12 Controlling the received source informati on Operation Command Filter off the SA messages from a specified MSDP p.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-11 Table 30-14 Configuring the MSDP connection retry period Operation Command Configuring the MSDP connection retry perio d time.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-12 30.3 Displaying and Debugging MSDP I. Displaying and Debugging MSDP After the above configurati on, execute display commands in any view to display the running information of MSDP and to veri fy the effect of the configuration.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-13 30.4 MSDP Configuration Examples 30.4.1 Configuring Static RPF Peers I. Networking requirements In the following networking e.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-14 [SwitchD-msdp] static-rpf-peer 10.10.1.1 rp-policy list-a Configure Switch B to be a stat ic RPF pe er of Switch D. [SwitchD] ip ip-prefix list-b permit 10.21.0.0 16 [SwitchD] msdp [SwitchD-msdp] peer 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-15 II. Networking diagram SRC A Swit ch E Loop bac k0 10.10. 1.1 Loop back1 0 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-16 [SwitchB-LoopBack10] igmp enable [SwitchB-LoopBack10] pim sm [SwitchB-LoopBack10] quit Configure the IP address of Vlan-interface10 and ena ble IGMP and PIM-SM. [SwitchB] interface Vlan-interface10 [SwitchB-Vlan-interface10] ip address 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-17 [SwitchA] vlan 10 [SwitchA-vlan10] port ethernet1/1/2 [SwitchA-vlan10] quit [SwitchA] vlan 20 [SwitchA-vlan20] port ethernet1/1/3 [SwitchA-vlan20] quit Enable multicast. [SwitchA] multicast routing-enable Configure the IP address of interface loopba ck0.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-18 [SwitchA-ospf-1] quit Configure Switch B as its MSDP peer . [SwitchA] msdp [SwitchA-msdp] peer 10.10.1.1 connect-interface loopback 0 Configure Originating RP . [SwitchA-msdp] originating-rp loopback0 [SwitchA-msdp] quit Configure C-RP and BSR.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-19 II. Networking diagram SRC A Vlan-i nterfa ce30 Vlan -interfa ce20 Vl an-int erface10 PIM-SM domain 4 Loopba ck10 10.1 .1.1 Lo opback0 10.2 5.1.1 Loopba ck0 10.2 5.1.2 Ether net: 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-20 Enable multicast. [SwitchA] multicast routing-enable Configure the IP address of interface loopba ck0 and e nable PIM-SM. [SwitchA] interface loopback0 [SwitchA-LoopBack0] ip address 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-21 [SwitchA-bgp] peer 10.27.1.2 group in [SwitchA-bgp] peer in connect-interface loopback0 [SwitchA-bgp] ipv4-family multicast [SwitchA-bgp-af-mul] peer in enable [SwitchA-bgp-af-mul] peer 10.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-22 [SwitchE] multicast routing-enable Configure the IP address of interface loopba ck0 and e nable PIM-SM. [SwitchE] interface loopback0 [SwitchE-LoopBack0] ip address 10.26.1.2 255.
3Com Switch 8800 Configurati on Guid e Chapter 30 MSDP Configuration 30-23 [SwitchE-bgp] ipv4-family multicast [SwitchE-bgp-af-mul] peer in enable [SwitchE-bgp-af-mul] peer 10.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-1 Chapter 31 MBGP Multicast Extension Configuration 31.1 MBGP Multicast Extension Overview 31.1.1 Introduction At present, the most widely used inter-dom ain uni cast routing protocol is B GP-4.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-2 I. MP_REACH_NLRI attribute MP_REACH_NLRI is an optional non-tra nsitive attribu te, and can be used to: z Send the routing information of a new reach able p rotocol.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-3 31.2 MBGP Multicast Extension Configuration Basic configu ration ta sks of MBGP multicast extension inclu.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-4 Table 31-1 Enabling MBGP multicast extension protocol Operation Command Enter the MBGP multicast address .
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-5 31.2.5 Configuri ng Local Preference Differe nt local preference can be con figured as a reference o f the MBGP route selection.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-6 II. Enabling a peer (group) Please perform the following configurations in IPV4 multicast sub-address family view .
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-7 By default, there is no route reflector in an AS. It is generally unnecessary to configure th is command for a peer group. This command is reserved for the occasional comp atibilit y with the network equipment s of other vendors.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-8 Table 31-9 Configuri ng IP-ACL -based route filtering policy for a p eer (group) Operation Command Config.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-9 Operation Command Remove outgoing policy cnfiguration undo peer group -name ip-prefix prefixn ame export By default, a peer (group) does not pe rform r oute filtering based on the prefix list.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-10 31.2.10 Configure MBGP Community Attributes Within the MBGP , a community is a set of destinations with some characterie stics in common. A community is not limited to a network or an AS has no physical boundary .
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-11 31.2.14 Resetting BGP Connections After changin g the MBGP policy or p rotocol configuration, users must disconn ect the present BGP con nection to make the new configu rati on ef fective.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-12 31.4 MBGP Multicast Extension Configuration Example I. Networking requirement This example describe s how the administrat or uses t he MBGP attribute s to manage route selection.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-13 [SwitchA-bgp-af-mul] network 1.0.0.0 [SwitchA-bgp-af-mul] network 2.0.0.0 [SwitchA-bgp-af-mul] quit Configure peers relationship. [SwitchA-bgp] bgp 100 [SwitchA-bgp] group a1 external [SwitchA-bgp] peer 192.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-14 [SwitchB-vlan40] quit [SwitchB] interface vlan-interface 40 [SwitchB-Vlan-interface40] ip address 194.1.1.2 255.255.255.0 [SwitchB-Vlan-interface40] quit [SwitchB] ospf [SwitchB-ospf-1] area 0 [SwitchB-ospf-1-area-0.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-15 [SwitchC-bgp] group c2 internal [SwitchC-bgp] peer 194.
3Com Switch 8800 Configurati on Guide Chapter 31 MBGP Multicast Extensio n Conf iguration 31-16 [SwitchD-ospf-1-area-0.0.0.0] quit [SwitchD-ospf-1] quit [SwitchD] bgp 200 [SwitchD-bgp] undo synchronization [SwitchD-bgp] group d1 internal [SwitchD-bgp] peer 194.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-1 Chapter 32 ACL Configuration 32.1 ACL Overview 32.1.1 Introduction to ACL A series match rules must be configur ed to recognize the p acket s before they are filtered.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-2 Note: Depth first principl e means putting the st atement with smaller p acket range in the front. Y ou can know the packet range by comp ar ing IP address wildcards: The smaller the wildcard is, the smaller host range is.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-3 Table 32-1 Requirement s for defining ACLs Item Number range Maximum number Number-based basic ACL 2000 to 2999 1000 Number-b.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-4 Table 32-3 ACL configuration tasks No. Item Command Description 1 Enter the system view <SW8800> system-v iew — 2 Con.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-5 sta rt - time and end - time days - of - the - week define period time ra nge together . start - time sta rt - date and end - time end - date define absolute time range together .
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-6 Table 32-6 Length of template elem ent s Name Description Length in template cos 802.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-7 The fragment-flags field i s 0 in length in flow template, so it can be ignored in calculating the total length of template element s. Y ou can either use the defa ult template or define a flow template base d on your needs.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-8 Note: z If the time-range keyword is not sel ected, the ACL will be effective at any time af ter being activated. z You can define multiple rules for the A CL by using the rule command seve ral times.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-9 Table 32-9 Define advan ced A CL Operation Co mmand Enter advanced ACL view (system view) acl { number acl - n umber | name a.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-10 32.2.4 Activating ACL After defining an ACL, you must activate it. This configuration activates those ACL s to filter or classify the packet s forwarded by hardware. For interface cards, perform the following c onfigurations in Ethernet port view or port group view .
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-11 Display ACL configuration displa y acl config { all | acl - nu mber | acl - name } Display ACL application information displ.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-12 III. Configuration procedure Note: Only the commands concerning AC L co nfiguration are listed here. 1) Define the time range. Define the time range from 8:00 to 18:00. [SW8800] time-range 3Com 8:00 to 18:00 working-day 2) Define inbound traffic to the wage server.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-13 Note: Only the commands concerning AC L co nfiguration are listed here. 1) Define the time range. Define the time range from 8:00 to 18:00. [SW8800] time-range 3Com 8:00 to 18:00 daily 2) Define the traffic with source IP 10.
3Com Switch 8800 Configurati on Gu id e Chapter 32 ACL Configurati on 32-14 1) Define the time range. Define the time range from 8:00 to 18:00. [SW8800] time-range 3Com 8:00 to 18:00 daily 2) Define a.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-1 Chapter 33 QoS Configuration 33.1 QoS Overview Conventional packet net work treats all packet s equally .
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-2 There are two key steps in p acket filtering: S tep 1: Classify the traffic at the port according to a sp ecific rule. S tep 2: Run filtering operation (deny or permit ) to the i dentified traf fic.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-3 Figure 33-2 Ethernet frame with 802.1 Q tag head er In the above figure, each host sup porting 80 2.1Q protocol adds a 4-byte 802.1Q t ag header afte r the so urce address in Ethernet heade r .
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-4 Packets sent vi a this interface high priori ty Low pr iority Classif y Packets sent Sendin g queue Dequeue queue 7 queue 6 queue 5 queue 4 queue 3 queue 2 queue 1 queue 0 Figure 33-4 Priority queues SP algorithm is de signed for key services.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-5 Another merit for WRR algorithm: Thou gh t he queues are sched uled by turn, they are not configured with fixed time quantum . If a queu e has no p ackets, the system immediately schedules the next queu e.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-6 Item Command Description Apply flow template flow-template user-defined Optional. Refer to section 32.2.2 “ Defining and Applying Flow Template”. Activate ACL packet-filter inbound Optional.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-7 Item Command Description Display QoS configuration display You can execute the display command in any view to check the QoS configuration. Refer to section 33.3.11 “ Displaying and Debugging QoS Configuration”.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-8 II. Network diagram GE 7/1/ 8 GE7 /1/1 GE7 /1 /2 VL A N 2 , 1. 0. 0. 1/ 8 PC1 GE 7/1/ 8 GE7 /1/1 GE7 /1 /2 VL A N 2 , 1. 0. 0. 1/ 8 PC1 VL A N 3 , 2.0. 0. 1/ 8 PC2 VL A N 3 , 2.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-9 z Configuring Traffic Shaping z Configuring Traffic Priority z Configuring Traffic Redirection z Configuring Queue Sched uling.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-10 After receiving a p acket, the switch allocates a set of service param eters to it according to a specific rule. The switch fi rst get s its l ocal precedence and drop preceden ce according to the p acket 802.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-11 Table 33-4 Configure def ault local precedence for p ort Operation Co mmand Configure default local preceden ce for a port priorit y priority - level Restore the default local prece dence for a port undo priority 33.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-12 Restore the default values of the Local-precedence + Confo rm-Level — > mapping table (conform level view) undo local-precedence The system provides defaul t mapping t ables.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-13 Note: z The parameters of traffic policy must be the same if you configure th e same tc-index for different traffic; otherwise the system prompts you for the wrong configuration.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-14 rates, while traf fic policing drops excessiv e p ackets. Therefore, traf fic shaping may increase transmissi on delay , but not for traffic poli cing. Perform the following configurations in Ethern et port view o r port group view .
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-15 Remove traffic priority setting which applies IP group ACL and link gro up ACL at same time undo traffic-priority inbound ip-.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-16 Table 33-9 Configure traffic redi re ction Operation Command Configure traffic redirection which only applies IP group ACL tr.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-17 33.3.6 Configuring Queue Scheduling Each port support s eight outbound queues exc ept that port of XP4 board only sup ports four queues. The switch puts the packet s into the queues according to the local precedence of p acket s.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-18 1) Tail drop mode: Different queues (red, yellow and red) are allocated with differe nt drop thresholds. Wh en these thresholds are exceeded respe ctively, excessive packets will be dropped.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-19 II. Configuring drop algorithm Please perform the following configurations in Ethernet port view .
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-20 a system index for it when delivering an ACL rule with this command. Howev er , you are not recommended to a ssi gn a system index if not urgently necessary . See the corresponding Co mmand M anual for det ail s of the commands.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-21 port. You can only choose port B on board 2 as its monitoring port when configuring a se con d mirroring group in the same direction on b oard 1. z One mirroring group can co ntain as many as 24 monit ore d ports at most.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-22 Configure traffic statistics which only applies link group ACL traffic-statisti c inbound link-group { acl - number | acl - n.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-23 Operation Command Display traffic limit configuration of a port display qos-interface [ interface - na me | interface - type .
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-24 33.4 Configuration Example 33.4.1 Traffic Shaping Configuration Example I. Network requirements Set traffic shaping for the outbound queue 2 at the port GE7/1/8: maximum rate 500kbps, burst size 12 k bytes.
3Com Switch 8800 Configurati on Gu id e Chapter 33 QoS Configuration 33-25 II. Network diagram Se r v e r E3/0/8 E3/0/2 E3/0/1 Se r v e r GE3/1/ 8 GE3/1/2 GE3/1/1 Se r v e r E3/0/8 E3/0/2 E3/0/1 Serve.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-26 Create a number-based basic ACL 2 000 and enter it. [SW8800] acl number 2000 Define ACL rule for the traf fic from PC1. [SW8800-acl-basic-2000] rule 0 permit source 1.0.0.1 0 time-range 3Com 3) Define the CoS — > Conform-Level map ping table.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-27 Re-allocate service parameters for the pa cket s from PC1. [SW8800-GigabitEthernet7/1/1] traffic-priority inbound ip-group 2000 remark-policed-service dscp 63 33.4.4 Traffic Redirecti on Configuration Example I.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-28 33.4.5 Queue Scheduling Configuration Example I. Network requirements Modify the corresponden ce between 802.1p pri ori ty levels and local priority levels to change the mapping bet ween 802.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-29 2) Use WRR algorithm for the queues 0 to 5. Set the queues 0, 1 and 2 into WRR queue 1, with weight respectively as 20, 20 and 30; set the queues 3, 4 and 5 into WRR queue 2, with weight re spectively as 20, 20 and 40.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-30 III. Configuration procedure 1) Configure WRED parameters Configure parameters for WRE D 0. [SW8800] wred 0 [SW8800-wred-0] queue 7 150 500 5 100 150 10 50 100 15 10 2) Set drop algorithm and thresholds.
3Com Switch 8800 Conf ig uration Guide Chapter 33 QoS Configurati on 33-31 3) Count the packets to PC1 and display the result using the display command.
3Com Switch 8800 Conf iguration Guide Chapter 34 Logon User ACL Control Config uration 34-1 Chapter 34 Logon User ACL Control Configuration 34.1 Overview As the Ethernet switches are used m ore and more widely over the networks, the security issue becomes ev en more import ant.
3Com Switch 8800 Conf iguration Guide Chapter 34 Logon User ACL Control Config uration 34-2 Operation Command Delete a sub-rule (ba sic ACL view) undo rule rule - id [ source ] [ fragment ] [ time-ran.
3Com Switch 8800 Conf iguration Guide Chapter 34 Logon User ACL Control Config uration 34-3 34.2.3 Configur ation Example I. Network requirements Only the T elnet users from 10.1 10.100.52 and 10.1 10.100.46 can access the switch. II. Network diagram Internet Switch Figure 34-1 ACL configuration for Teln et users III.
3Com Switch 8800 Conf iguration Guide Chapter 34 Logon User ACL Control Config uration 34-4 34.3.2 Importing ACL Import the defined ACL into the commands with SNMP comm unity , username and group name configured, to achieve ACL control over SNMP users.
3Com Switch 8800 Conf iguration Guide Chapter 34 Logon User ACL Control Config uration 34-5 34.3.3 Configur ation Example I. Network requirements Only SNMP u sers fro m 10.1 10.100.52 and 10.1 10.100.46 can access the switch. II. Network diagram Internet Switch Figure 34-2 ACL configuration for SNM P users III.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-1 Chapter 35 MPLS Architecture Note: A Switch 8800 running MP LS can serve as a router . Routers mentioned in this manual can be either a router in common sense, or a layer 3 Ethernet switch running MP LS.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-2 35.2.2 Label I. Label definition A label is a lo cally significant short identifier with fixed length, which is used to ide ntify a FEC.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-3 Et hernet S O N E T /S DH pac k et Et hernet header / PPP heade r F lag La y er 3 data F r am e m o de AT M pa c k et C ell m .
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-4 In independent control mode, each LS R can send label mapping message s to the LSRs it connect s to at anytime.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-5 with labels, distributes label binding message s, establishes a nd maintain s label forwarding ta ble. The network consisting of LSRs is called MP LS domain. The LSR that is located at the edge of the domain is call ed edge LSR (LER, Lab eled Edge Router).
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-6 35.3.3 Establishing LSP Actually , the establishment of LSP refers to the process of binding FEC with the label, and then advertising this binding to the adjacent LSR on LSP .
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-7 received the returned label map message fr om it s downstream LSR. Usually , the upstream LS R select s the downstream LSR acco rding to the information in it s routing table.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-8 As shown in Figure 35-5, LSP <R2 R21 R22 R3> is a tunnel betwe en R2 and R3. II. Multi-layer label stack In MPLS, a packet may carry multiple labels wh ich are in the form of st ack.
3Com Switch 8800 Configurati on Gu id e Chapter 35 MPLS Architecture 35-9 there are obvious advanta ges to implement VPN by MPLS. MPLS VPN connect s the geographicall y different branche s of private network by using LSP , forming a united network. MPLS VPN also support s the interconnection betwee n dif ferent VPNs.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-1 Chapter 36 MPLS Basic Capability Configuration 36.1 MPLS Basic Capability Overview Basic MPLS forwarding fu nctions includ es LDP session e stablishment an d LSP path maintenance .
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-2 Table 36-1 Define MPLS LSR ID Operation Command Define LSR ID mpls lsr-id ip-ad dress Delete LSR ID undo mpls lsr-id By default, LSR ID is not defined.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-3 be the ingress node, an in termediate node (also called transit no de), or the egress node. Note that an LSP operates normally only af ter all the LSRs along the LSP have been properly configure d.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-4 Table 36-5 Enable/disa bl e LDP view Operation Command Enable LDP proto col mpls ld p Disable LDP undo mpls ld p By default, LDP is di sabl ed.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-5 There is no default remote-peer . II. Configuring an address for the remote-peer Y ou can spec ify the addres.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-6 Table 36-9 Configure ba sic session hold-time Operation Command Configure session hol d-ti me mpls ld p timer.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-7 36.3.5 Configuring LDP Loop Detection Control I. Enabling loop detection It is used to enable or di sable the loop detection function during LDP signaling p rocess.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-8 III. Setting the maximum hop count in path vector mode When path vector mode i s adopted for loop detection, it is also necessary to specif y the maximum value of LSP path.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-9 Table 36-16 Display the static LSP information Operation Co mmand Display the static LSP information display mpls st atic-lsp [ include text | verbose ] II.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-10 V. Trapping MPLS This command is use d to enable the trap function of MPLS duri ng an LSP/LDP setup process . Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-11 II. LDP debugging commands Execute debugging command in us er view for the debugging of various messages rel.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-12 II. Network diagram Switch A SwitchB SwitchC SwitchD VLAN 20 1 168.1.1. 1 VLAN2 01 168. 1.1.2 VL AN2 03 172. 17. 1.1 VLAN2 03 172. 17. 1.2 VLAN2 02 100. 10. 1.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-13 [SW8800] mpls [SW8800-mpls] quit [SW8800] mpls ldp Configure IP addre ss and enable MPLS and LDP for VLAN interface 201.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-14 Configure LSR ID and enable MPLS and LDP . [SW8800] mpls lsr-id 100.10.1.1 [SW8800] mpls [SW8800-mpls] quit [SW8800] mpls ldp Configure IP addre ss and enable LDP and MPLS for VLAN interface 202.
3Com Switch 8800 Configurati on Guide Chapter 36 MPLS Basic Capability Configur ation 36-15 36.6 Troubleshooting MPLS Configuration Symptom: Session cannot be setup with the pee r after LDP is enabled on the interface. T roubleshooti ng: Cause 1: Loop detection configuration i s dif ferent at the two ends.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-1 Chapter 37 BGP/MPLS VPN Configuration 37.1 BGP/MPLS VPN Overview T raditional VPN, for which layer 2 tunneling protocol s (L2TP , L2F and PPTP , and so on.) or layer 3 tunnel technology (IPSec, GRE and so on.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-2 37.1.1 BGP/MPLS VPN Model I. BGP/MPLS VPN model site 1 CE site 2 CE VPN1 site 3 CE VPN2 site 1 VPN1 site 2 VPN 2 CE PE.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-3 VPNs. These disadvant ages not only increa se the network operating cost, but also bring relevant management and se curity issues.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-4 compatibility: It not only suppo rts traditional IPv4 address family , but also supports other address families, for example, VPN- IPv4 address family .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-5 RD IPv4 addr es s ... ERT1 ERT2 ... ERTn ERT: Ex por t Rout e Target s Impor t Route Tar gets : ( IRT1, IRT 2, .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-6 LSPs must be set up between PEs for VPN dat a traf fic forwarding with MPLS LSP . The PE router which receives p acket s from CE and create label protocol st ack is calle d ingress LSR, while the BGP next hop (egress PE router) is egre ss LSR.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-7 3) Each P router on LSP forwards MPLS pac kets using exterior-l ayer label to the penultimate-hop router, namely the P router b efore PE2. The penultimate-hop router extracts the exterior-layer and sends MPLS packet to PE2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-8 As shown in Figure 37-5, the PEs directly conne cted with user device s are call e d UPE (underlayer PE or user-end PE); the devices in the core network connected with the UPEs are called SPE (superstratum PE or service-provider-end PE).
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-9 interface, routing t able, and sends VPN r outing information over MPLS network using BGP/OSPF interaction. If supporting OSPF multi-insta nce, one rout er can run multiple OSPF procedures, which can be boun d to diffe rent VPN inst ances.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-10 compromised method b rings additional config uration burden and ha s limitation in actual use.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-11 I. Creating static route If you select static route mode for CE-P E r oute switching, you should then configure a private static route p ointing to PE on CE. Perform the following configur ation in th e system view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-12 37.2.2 Configur ing PE Router I. Configuring basic MPLS capability It includes configuring MPLS LSR ID, enabl e MPLS globally and enable MPLS in the correspondi n g VLAN interface view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-13 3) Configure vpn-instance description Perform the following configuration in vpn-in stance view Table 37-5 Configure .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-14 By default, the value is both . In general all sites in a VPN can be interconnecte d, and the import-extcommunity and export-ext communi ty attributes are the same, so you can execute the command only with the both option.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-15 Table 37-8 Configure ba sic A CL Operation Command Configure basic ACL acl { number acl - number | name acl - name ba.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-16 z Both VLAN ID and IP address-based packet re dire ction. Perform the following configurati on in th e Ethernet po rt view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-17 Y ou can configure a st atic route pointing to CE on PE for it to learn VPN routing information from CE.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-18 routes should also be im ported into OSPF . Here only introduces OSPF multi-in stance configuration in detail. First step: Configure OSPF procedure. Perform the following configur ation in th e system view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-19 Caution: The configured value will not t ake ef fect unit the command reset osp f is executed.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-20 Table 37-19 Configure sham link Operation Command Configure sham link sham-link sour ce - addr destination - addr [ c.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-21 By default, BGP neighbor is active while MBGP neighbor is inactive. Y ou should activate MBGP neighb or in VPNv4 sub-addre ss famil y view . Perform the following configuration in VPNv4 sub-address family view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-22 In the case of standard BGP , BGP tests routing loop via AS number to avoid generating routing loop.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-23 Table 37-26 Permit BGP session over any operable TCP interfa ce Operation Command Permit BGP se ssion over any operab.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-24 Table 37-29 Enable/disabl e IBGP peer group Operation Command Enable a peer group peer group - name enable Disable a .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-25 Operation Command Remove to advertise default route to the peer (group) undo peer { peer - address | group - name } d.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-26 II. Displaying IP routing ta ble associated with vpn-instance After the above configurat ion, you ca n execute displa.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-27 V. Displaying MPLS l3vpn-lsp information Table 37-38 Display MPLS l3vpn-lsp information Operation Command Display MPL.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-28 II. Network diagram AS 65430 AS 65410 AS 65430 AS 65440 VPN - B CE4 PE1 RD(1 00: 1) P VPN - A CE3 VLAN2 01 168. 3.1.1/ 16 168. 3.1.2/1 6 AS 65420 VPN - B CE2 VPN - A CE1 VLAN 20 1 168.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-29 Note: The configuration on the other three CE switches (CE2 to CE4) is si milar to that on CE1, the details are omitted here.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-30 [PE1] mpls lsr-id 202.100.1.1 [PE1] mpls [PE1-mpls] quit [PE1] mpls ldp [PE1] vlan 201 [PE1-vlan201] port gigabitethernet 2/1/1 [PE1-vlan201] quit [PE1] interface Vlan-interface 201 [PE1-Vlan-interface201] ip address 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-31 [P-LoopBack 0] quit [P] vlan 301 [P-vlan301] port gigabitethernet 3/1/1 [P-vlan301] quit [P] interface Vlan-interface 301 [P-Vlan-interface301] ip address 172.1.1.2 255.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-32 [P-ospf-1] import-route direct 4) Configure PE3 Note: The configuration on PE3 is si milar to that on PE1, you sh.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-33 [PE3] mpls lsr-id 202.100.1.3 [PE3] mpls [PE3-mpls] quit [PE3] mpls ldp [PE3] vlan 201 [PE3-vlan201] interface gigabitethernet 2/1/1 [PE3-vlan201] quit [PE3] interface Vlan-interface 201 [PE3-Vlan-interface201] ip address 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-34 z Two Switch 8800s se rve as PE devices, wh ich supp ort MPLS feature. CE-1 and CE-2 are two mid-range switche s; a Layer 2 switch serves as both CE-3 and CE-4, which is accessed dire ctly with users.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-35 Note: The configuration on VPN-B is simil ar to t hat on VPN-A and only VPN-A configuration is detailed he re.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-36 Globally enable MPLS. [PE1] mpls lsr-id 1.1.1.9 [PE1] mpls [PE1] mpls ldp Configure the public network interface a nd ena ble MPLS on it. [PE1] interface loopback0 [PE1-LoopBack0] ip address 1.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-37 Note: The configuration on VPN-B is simil ar to t hat on VPN-A and only VPN-A configuration is detailed he re.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-38 [PE2-bgp-af-vpn] peer 2 enable [PE2-bgp-af-vpn] peer 1.1.1.9 group 2 Globally enable MPLS. [PE2] mpls lsr-id 2.2.2.9 [PE2] mpls [PE2] mpls ldp Configure the public network interface a nd ena ble MPLS on it.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-39 Note: Cautions and configuration limit ations in hybrid networking: z For a trunk port on th e common interfa ce ca rd, you can configure to redi rect MPLS VPN of multiple VLANs to the same destination port.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-40 37.4.3 Extranet C onfiguration Example I. Network requirements Company A and Company B are located at City A and City B respectively . Their headquarters is located at City C.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-41 III. Configuration procedure Note: This configuration procedure ha s omit ted configurations bet ween PE and P , and configurations on CEs. For these det a ils refer to the former example.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-42 [PE-A-mpls] quit [PE-A] mpls ldp Set up MP-IBGP adjace ncy between PEs to exchange i nter-PE VPN routing information and activate MP-IBGP peer in VPNv4 sub-address family view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-43 [PE-C-LoopBack0] ip address 20.1.1.1 255.255.255.255 [PE-C-LoopBack0] quit Configure MPLS basic capacity .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-44 [PE-B] vlan 301 [PE-B-vlan301] port gigabitethernet 3/1/1 [PE-B-vlan301] quit [PE-B] interface Vlan-interface 301 [PE-B-Vlan-interface301] ip binding vpn-instance vpn-instance3 [PE-B-Vlan-interface301] ip address 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-45 z Set up IBGP adjacency between PE1 and PE2 o r PE1 and PE3, but not between PE2 and PE3, that is, VPN routing inform ation cannot be exchanged between PE2 and PE3.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-46 II. Network diagram Interne t CE1 PE1 CE2 PE2 PE3 20.1.1 .2 CE3 Hub Site Spoke Site Spoke Site VLAN 20 1 172. 18.0.1/1 6 VLAN2 01 172. 16. 0.1/1 6 VLAN2 02 172. 17. 0.1/1 6 VLAN2 01 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-47 [PE1] bgp 100 [PE1-bgp] ipv4-family vpn-instance vpn-instance2 [PE1-bgp-af-vpn-instance] import-route static [PE1-bgp-af-vpn-instance] import-route direct [PE1-bgp-af-vpn-instance] group 17216 external [PE1-bgp-af-vpn-instance] peer 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-48 [PE1-bgp] peer 22.1.1.1 group 22 as-number 100 [PE1-bgp] peer 22.1.1.1 connect-interface loopback 0 [PE1-bgp] group 33 [PE1-bgp] peer 33.1.1.1 group 33 as-number 100 [PE1-bgp] peer 33.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-49 [PE2-LoopBack0] quit Set up MP-IBGP adja cency between PE2 and PE1 to exchange inter-PE VPN routin g information and activate MP-IBGP peer in VPNv4 sub-address family view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-50 [PE3] interface loopback 0 [PE3-LoopBack0] ip address 33.1.1.1 255.255.255.255 [PE3-LoopBack0] quit Set up MP-IBGP adja cency between PE3 and PE1 to exchange inter-PE VPN routin g information and activate MP-IBGP peer in VPNv4 sub-address family view .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-51 II. Network diagram AS:100 CE1 PE1 CE2 PE2 PE3 Loopback0 1.1.1. 1/32 Loopback0 2.2.2. 2/32 Loopback0 3.3.3. 3/32 VLAN2 11 172. 11. 11.2/ 24 VLAN2 11 172. 11. 11.1/ 24 VLAN2 12 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-52 [PE1-vpn-vpn-instance1.2] quit Set up MP-EBGP adjacency between PE1 and CE1, import intra-CE1 VPN routes learned into VPN-insta nce 1.1. [PE1] bgp 100 [PE1-bgp] ipv4-family vpn-instance vpn-instance1.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-53 Configure MPLS basic cap acity , enable LD P on the in terface conne cting PE1 and PE2 and the interface connecting PE1 and PE3.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-54 [PE1-bgp] peer 3.3.3.3 group 3 [PE1-bgp] peer 3.3.3.3 connect-interface loopback 0 [PE1-bgp] ipv4-family vpnv4 [PE1-bgp-af-vpn] peer 2 enable [PE1-bgp-af-vpn] peer 2.2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-55 [PE2-bgp-af-vpn-instance] peer 172.22.22.2 group 17222 as-number 65002 [PE2-bgp-af-vpn] quit [PE2-bgp] quit Bind the interface connecting PE2 and CE 1 to VPN-instance 2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-56 [PE3-bgp-af-vpn-instance] import-route direct [PE3-bgp-af-vpn-instance] import-route static [PE3-bgp-af-vpn-instance] group 192 external [PE3-bgp-af-vpn-instance] peer 192.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-57 II. Network diagram P1 VLAN205 10.1.1.2/24 20.1.1.1/24 CE1 CE2 172.12.12.2/24 PC1 PC2 CE4 PC4 CE3 172.21.21.2/24 PC3 192.168.11.10 192.168.21.10 192.168.12.1 0 192.168.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-58 [PE1] vlan 205 [PE1-vlan205] port gigabitethernet 2/2/1 [PE1-vlan205] quit [PE1] interface Vlan-interface 205 [PE1-Vlan-interface205] mpls [PE1-Vlan-interface205] mpls ldp enable [PE1-Vlan-interface205] ip address 10.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-59 [PE2] mpls [PE2-mpls] quit [PE2] mpls ldp Configure the VLAN interface connecting CE. [PE2] vlan 203 [PE2-vlan203] port gigabitethernet 2/1/1 [PE2-vlan203] quit [PE2] vlan 204 [PE2-vlan204] port gigabitethernet 2/1/2 [PE2-vlan204] quit Configure loopback interfa ce.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-60 [PE2-bgp-af-vpn-instance] import-route direct [PE2-bgp-af-vpn-instance] group 172-12 external [PE2-bgp-af-vpn-instance] peer 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-61 [P1-Vlan-interface206] mpls ldp enable [P1-Vlan-interface206] ip address 98.98.98.1 255.255.255.0 [P1-Vlan-interface206] quit Configure IBGP neigh bors and EBGP neighb ors.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-62 III. Configuration procedure z Configuring OSPF on the MPLS backb one net work z Configuring basic MPLS ca pability on the MPLS backbone network z Configuring a VPN instance on PEs.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-63 [PE2] interface pos1/1/0 [PE2-Pos1/1/0] ip address 162.1.1.2 255.255.0.0 [PE2-Pos1/1/0] quit [PE2] ospf [PE2-ospf-1] area 0 [PE2-ospf-1-area-0.0.0.0] network 162.1.0.0 0.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-64 [PE1-Pos1/1/0] mpls ldp [PE1-Pos1/1/0] quit Configure basic MPLS capa bility on ASBR-PE1, enable LDP on the interface connected to PE1, and enable MPLS on t he interface connected to ASBR-PE2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-65 3) Create a VPN instance on each PE, and bind the instance to the interface connected to the corresp onding CE. Configure CE1 [CE1] interface ethernet 1 [CE1-Ethernet1] ip address 168.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-66 Note: z Enable the exchanging of label-carrie d IPv4 route between the following routers: PE1 and ASBR-PE1, PE2 and ASBR-P E2, ASBR-PE1 and ASBR-PE2. z Make each ASBR-PE change the next hop to it s own when it advertises routes to the PE in the same AS.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-67 [ASBR-PE1-acl-basic-2001] quit [ASBR-PE1] route-policy rtp-ebgp permit node 1 [ASBR-PE1-route-policy] if-match acl 20.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-68 [PE2-bgp] group 30 external [PE2-bgp] peer 30 ebgp-max-hop [PE2-bgp] peer 202.100.1.2 group 30 as-number 100 [PE2-bgp] peer 202.100.1.2 connect-interface loopback0 [PE2-bgp] ipv4-family vpnv4 [PE2-bgp-af-vpn] peer 30 enable [PE2-bgp-af-vpn] peer 202.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-69 networks at the city level into a single MPLS VPN will impose a high requirement in performance on the equipment on the entire ne twork, in the event that the network topology size is large.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-70 [SPE] mpls ldp Configure VPN-inst ance [SPE] ip vpn-instance vpn1 [SPE-vpn-vpn1] route-distinguisher 100:1 [SPE-vpn-v.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-71 Configure the basic MPLS capability . [UPE] mpls lsr-id 1.0.0.1 [UPE] mpls [UPE-mpls] quit [UPE] mpls ldp Configure V.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-72 37.4.9 OSPF Multi-instance sh am link Configuration Example I. Network requirements As shown in the following picture, a comp any connect s to a W AN through OSPF multi-instance function of a router .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-73 [PE1] vlan 203 [PE1-vlan203] port gigabitethernet 2/1/3 [PE1-vlan203] quit [PE1] interface Vlan-interface 203 [PE1-Vlan-interface203] ip address 168.1.12.1 255.255.255.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-74 [PE1-bgp-af-vpn-instance] import-route ospf-ase 100 [PE1-bgp-af-vpn-instance] import-route ospf-nssa 100 [PE1-bgp-af-vpn-instance] import-route direct [PE1-bgp-af-vpn-instance] undo synchronization Create and activate peer in MBGP .
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-75 [PE2-Vlan-interface203] mpls ldp enable [PE2-Vlan-interface203] quit [PE2] vlan 201 [PE2-vlan201] port gigabitetherne.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-76 [PE2-bgp-af-vpn] peer fc enable [PE2-bgp-af-vpn] peer fc advertise-community [PE2-bgp-af-vpn] peer 50.1.1.1 group fc Configure OSPF and import BGP and direct-connect route.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-77 [CE1-ospf-100-area-0.0.0.0] network 12.1.1.0 0.0.0.255 4) Configure CE2 Configure interface. [CE2] vlan 202 [CE2-vlan202] port gigabitethernet 2/1/2 [CE2-vlan202] quit [CE2] interface Vlan-interface 202 [CE2-Vlan-interface202] ip address 12.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-78 II. Network diagram VP N 3 VP N 2 VP N 1 A S 50002 VP N 1 A S 50001 prov _pe1 5. 5. 5. 5 cus t _ pe1 6. 6. 6. 6 CE1 CE 2 CE3 CE 4 VP N 2 VP N 1 A S 50003 CE 5 VP N 3 CE 6 CE7 cu s t _ p e 2 7.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-79 [prov_pe1-ospf-area-0.0.0.0] network 10.0.0.0 0.255.255.255 Configure prov_pe2 <SW8800> system-view [SW8800] sysname prov_pe2 [prov_pe2] interface LoopBack0 [prov_pe2-LoopBack0] ip address 4.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-80 [prov_pe1-bgp] quit Configure prov_pe2 [prov_pe2] bgp 100 [prov_pe2-bgp] group ibgp internal [prov_pe2-bgp] peer 5.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-81 [prov_pe2-Pos3/1/0] ip binding vpn-instance customer_vpn [prov_pe2-Pos3/1/0] link-protocol ppp [prov_pe2-Pos3/1/0] ip address 2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-82 [prov_pe1-bgp-af-vpn] peer ebgp vpn-instance customer_vpn enable [prov_pe1-bgp-af-vpn] peer 1.1.1.1 vpn-instance customer_vpn group ebgp [prov_pe1-bgp-af-vpn] peer 1.1.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-83 4) On each Customer PE, conf igure the su b-VPN that accesses the netwo rk through the Customer PE.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-84 II. Network diagram M P LS N et w or k PE v pn2 v pn1 Multi -VP N-I nsta nc e C E ospf 100 vpn1 ospf 300 vpn2 VLAN 201 10.1.1.2/24 VLAN 204 20.2.1.2/24 VLAN202 10.2.1.2/24 VLAN203 20.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-85 [CE] vlan 203 [CE-vlan203] port gigabitethernet 2/1/3 [CE-vlan203] quit [CE] interface Vlan-interface 203 [CE-Vlan-interface203] ip binding vpn-instance vpn2 [CE-Vlan-interface203] ip address 20.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-86 II. Network diagram PC 2 172.16.0.1/16 192.168.1.1/24 192 .168 .1.2 /24 E ther net2/1/0 20.1.1.2/24 E the r net 2/1/ 0 172.16.0.2/16 E ther net1/1/0 20.1 .1.1 /24 CE 2 PE 1 PE 2 PC 3 172.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-87 [PE2-LoopBack0] ip address 2.2.2.9 32 [PE2-LoopBack0] quit [PE2] interface Ethernet1/1/0 [PE2-Ethernet1/1/0] ip address 192.168.1.2 24 [PE2-Ethernet1/1/0] quit [PE2] ospf [PE2-ospf-1] area 0 [PE2-ospf-1-area-0.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-88 [PE2] mpls lsr-id 2.2.2.9 [PE2-mpls] lsp-trigger all [PE2-mpls] quit [PE2] mpls ldp [PE2-mpls-ldp] quit [PE2] interfa.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-89 [CE3-Ethernet1/1/0] quit [CE3] bgp 65430 [CE3-bgp] import-route direct [CE3-bgp] group 10 external [CE3-bgp] peer 20.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-90 [PE2-bgp] quit Configure multi-role host feature. Configure a default route pointing to PE1 on CE2. [CE2] ip route-static 0.0.0.0 0.0.0.0 20.1.1.2 If routing protocol is used between CE2 and PE1, to avoid routing loop, disable PE1 from advertising any route to CE2.
3Com Switch 8800 Configurati on Guide C hapter 37 BGP/MPLS VPN Configuration 37-91 III. Symptom 3 In Hub&S poke networking mode, spoke PE cann ot lea rn the private networking route of Hub PE. Solution: z Check whether the LSP tunnel i s established using the displ ay mpls lsp command.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-1 Chapter 38 MSTP Region-configuration 38.1 Introduction to MSTP MSTP st ands for Multiple S panning T ree Protocol, which is comp atible with S p anning T ree Protocol (STP) and Rapid S panning T ree Protocol (RSTP).
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-2 C A B BPDU BPDU BPDU CIST : com mon a nd internal s panning tree MSTI: m ulti pl e s panning tree insta nce CST : commo.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-3 IV. CST Common S panning T ree (CST): a LAN has only one CST . CST connect s the spanning trees of all MST region s. Regard ever y MST region as a “switch”, and the CST is generated by the computing of “switches” th rough STP/RSTP .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-4 z Master port is the port connecting t he entire region to the Com mon Root Bridge and located on the shortest path betwee n them. z An alternate port is a backup of the mat e r port, and al so a backup port of a root port in the region.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-5 Figure 38-3 BPDU packet format Figure 38-4 MSTI information format of the last pa rt in BPDU pa ckets Besides field roo.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-6 7 6 5 4 3 2 1 0 Tc P roposal Lear ning For war di ng Ag r e em e nt Tc A c k 7 6 5 4 3 2 1 0 Tc P roposal Lear ning For war di ng Ag r e em e nt Tc A c k Figure 38-5 Meaning of 1-byte Flags in BPDU pa ckets The second and third bit s together indi cate MSTP port role.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-7 Switch A Switch C Switch B CP2 BP2 CP1 BP1 AP2 AP1 LAN Figure 38-6 Design ated b ridge and designated port For a switch, the desi gnated bridge i s a swit ch in charge of forwarding BPDU to the local switch via a port called the designated port accordingly .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-8 priorities of Switch A, B and C are 0, 1 a nd 2 and the path cost s of their links are 5, 10 and 4 respectively .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-9 BPDU for every port: substituting the root ID with the root ID in the configuration BPDU of the root port, the cost of .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-10 CP2 receives from the BP2 of Switch B the configu ration BPDU { 1, 0, 1, BP2} that has not been updated and then the updating process is lau nched. The configuration BPDU is updated as {1, 0, 1, BP2}.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-11 configuration BPDUs besides t he first four items will make modifications according to certain rule s.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-12 38.2 Configuring MSTP MSTP config uratio n includes: z Configuring the MST Regi on for a Switch z Specifying the Switc.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-13 Setting the Timeout Factor of a Specific Bridge z Configuring the Max Transmission Spee d on a Port z Configuring a Po.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-14 Table 38-1 Enter MST region view Operation Command Enter MST region view (from system view) stp region-configura tion Restore the default settings of MST region undo stp region-configuration II.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-15 III. Activating the MST region configuration,and exit the MST re gion view Perform the following configuration in M S T region view .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-16 If the primary root is down or powered of f, the seco ndary root will t a ke it s place, unless you configure a new primary root.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-17 Restore the default MSTP running mode undo stp mode Generally , if there is a STP switch on the sw itching net work, the port connected to it will automatically transit from MSTP mode to STP-compatible mode.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-18 discards the configuration BPDU with 0 hop s lef t. This makes it impossible f or the switch beyond the max hop s to take part in the spanning tree calculation, thereby limiting the scale of the MST region.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-19 Note: The stp bridge-diameter command configures the swit ching network diameter and determines the three MSTP time parameters (Hello T ime, Forward Delay , and Max Age) accordingly .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-20 Caution: The Forward Delay configured on a switch depends on the switching network diameter . Generally , the Forward Delay is supposed to be longer wh en the network diameter i s longer .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-21 38.2.8 Setting the Timeout Fact or of a Specific Bridge A switch transmits hello p acket regularly to the adjacen t bridges to check if there is link failure.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-22 II. Configuration in Ethernet port vie w Perform the following configurat ion in Ethernet port view .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-23 Table 38-14 Configure a port as a n edge port or a non-e dge p ort Operation Command Configure a port as an edge port. stp edged- port enable Configure a port as a non-edge port.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-24 I. Configuration in system vie w Perform the following configuration in sy stem view . Table 38-15 Configure the path co st of a port Operation Command Configure the path co st of a port.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-25 The actual rate count s. 2) Calculating the path cost z Full-duplex and non-aggre gation po rt at a rate less than 1 GE Path cost = [200,000,000 / (rate × 10)] – 1 z Other ports Path cost = 200,000,000 / (rate × 10) II.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-26 The rate of the primary port in an aggregat ion group is determined by the sum of the port rates in this group. No calculation i s performed fo r secondary port. z Non-aggregation po rt The actual rate count s, but the rate is 0 if the port is down.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-27 Table 38-20 Configure the port prio rity Operation Command Configure the port priority . stp int erface interface - list instance inst ance - id port priority priority Restore the default port priority .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-28 Operation Command Configure MSTP to automatically detect if the port is directly connected with the point-to-p oint link.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-29 By default, the parameter is configu red as auto . 38.2.15 Configuring the mC heck Variable of a Port The port of an MSTP switch ope rates in either STP-compatibl e or MSTP mode.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-30 Y ou can configure mChe ck variable on a port with either of the earlie r-mentioned measures. Note that the command can be us ed only if the switch runs MSTP . The command does not make any sen se when the switch runs in STP-comp atible mode.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-31 Note: For the loop protection-en abled port, if the po rt p articip ates in STP calculation, all the instances of the port will be always set to be i n discarding st ate regardless of the port role.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-32 Operation Command Configure TC protection of the swit ch (from system view) stp tc-protection enable Disable TC protection (from system view) stp tc-protection disable By default, only the protection from TC-BPDU p a cket attack is ena bled on the switch.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-33 Table 38-27 Enable/Disabl e MSTP on a device Operation Command Enable MSTP on a device . stp enable Disable MSTP on a device . stp disable Restore the disable st at e of MSTP , as defaulted.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-34 disabled, upon receiving TC/TCN p acket s, the port broadcast s TC packets to delete the MAC address entries of the port in the STP active stat e on the bridge. Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-35 Table 38-31 Enable/Disabl e MSTP on a port Operation Command Enable MSTP on a port. stp en able Disable MSTP on a port. stp disable Y ou can enable/disa ble MSTP on a port with either of the earlier-m entioned measure s.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-36 Operation Command Enable STP global error or event debugging debugging stp { global-error | global-event } Disable STP global error or event debugging undo debugging stp { global-error | global-event } 38.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-37 III. Configuration procedure 1) Configurations on Switch A MST region [SW8800] stp region-configuration [SW8800-mst-re.
3Com Switch 8800 Configurati on Guide Chapter 38 MSTP Region-co nfiguration 38-38 MST region [SW8800] stp region-configuration [SW8800-mst-region] region-name example [SW8800-mst-region] instance 1 vl.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-1 Chapter 39 802.1x Configuration 39.1 802.1x Overview 39.1.1 802.1x Sta ndard Overview IEEE 802.1x (hereinafter si mplified as 802.1x ) is a port-based net work access control protocol that is used as the st and ard for LAN user access authentication.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-2 is to be encapsulated in th e packet s of other AAA upper layer protocols (e.g. RADI US) so as to go through the complicated netwo rk to reach the Authentication Server . Such procedure is called EAP Relay .
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-3 802.1x provides an implement ation solution of user ID authentication. However , 802.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-4 Checking the Users that Log on the Swit ch via Proxy z Setting Supplicant Number on a Port z Setting the Authentication in DHCP Environment z Configuring Authentication Method for 802.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-5 Configuring 802.1x Timers z Enabling/Disabling quiet-perio d Timer Among the above tasks, the first one is compul so ry , otherwise 802.1x will not take any effect. The other t asks are optional.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-6 auto (automatic identification mod e, which is al so called protocol control mode). That is, the initial state of the port is unau thorized. It only permits EAPoL packet s receiving/transmitting and does not permit the us er to acce ss the network reso urces.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-7 39.2.4 Checking the Users that Log on the Switch via Proxy The following commands are used for che cking the users that log on the switch via proxy . Perform the following configuration in sy stem view or Ethernet port view .
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-8 Perform the following configuration in sy stem view . Table 39-6 Set the Authentication in DHCP Environment Operation Comma.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-9 Perform the following configuration in sy stem view or Ethernet interface view .
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-10 39.2.10 Configur ing 802.1x Timers The following commands a re u sed for co nfiguring the 802.1x timers. Perform the following configuration in sy stem view . Table 39-10 Configure 802.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-11 supp - timeout - valu e : S pecifies how long the duration of an authentication timeout timer of a Supplicant is. The value range s from 10 to 120 in unit s of second and defa ults to 30.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-12 Enable the error/event/pa cket/all debugging of 802.1x debugging dot1x { err or | even t | p acket | all } Disable the error/event/p acket/all debugging of 802.1x. undo debugging dot1x { error | event | p acket | all } 39.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-13 II. Network diagram Supplicant Authentication S erve rs (RADIUS Serve r Cluster IP Address: 10.11. 1.1 10.11.1.2) Internet Authenticator Switch Supplicant Authentication S erve rs (RADIUS Serve r Cluster IP Address: 10.
3Com Switch 8800 Configurati on Guid e Chapter 39 802.1x Configurat ion 39-14 [SW8800-radius-radius1] primary accounting 10.11.1.2 Set the IP address of the seco nda ry aut hentication/accounting RADIUS serve rs. [SW8800-radius-radius1] secondary authentication 10.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-1 Chapter 40 AAA and RADIUS/TACACS+ Protocol Configuration 40.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-2 in PSTN environment or Ethernet switch with access function in Ethernet environ ment), NAS, namely RADIUS client end, will transmit user AAA request to the RADIUS server .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-3 Table 40-1 TACACS+ v s . RADIUS TACACS+ RADIUS Adopts TCP , providing more reliable network transmission. Adopts UDP . Encrypts the entire packet except for the standa rd T ACACS+ header .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-4 z The TACACS server send s back an authent ication response, req uesting for the login password. Upon receiving the respon se, the TACACS client requests t he user for the login password .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-5 User TACA CS Client TACA CS Server User lo gs on Authentication start packet Authentication resp .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-6 Figure 40-3 Network diagram for u sin g RADIUS to authenticate 40.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-7 Switch 8800 ISP domain view , you can conf igure a complete set of exclusive ISP domain attributes on a pe r-ISP dom ain basis, which includes AAA policy ( RADIUS scheme applied etc.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-8 users already online. An ISP is in active stat e once it is created, that is, at that time, all the users in the domain are allowed to req uest network service s.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-9 Once this function is enabled on the switch, users can locate the self-service server through the following operations: z Select "Change user password" on the 802.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-10 40.2.5 Setting the Attri butes of a Local User The attributes of a local user include it s pass word display mode, st ate, service type and some other settings.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-11 Operation Command Set the priority of the specified user level level Restore the default priorit.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-12 Table 40-9 Configure VLAN deliveri ng mode Operation Command Configure the VLAN delivering mode to be of string type private-group-id mode st andard Revert to the default VLAN delivering mode.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-13 Among the above tasks, creating RADI US sc heme a nd setting IP add ress of RADIUS server are required, while other t akes are optional and ca n be performed as your requiremen ts.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-14 Table 40-11 Set IP Address and Port Number of RA DIUS Serve r Operation Command Set IP address and port number of prima ry RADIUS authentication/aut hori zation server .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-15 4 RADIUS servers, or specify one of the two servers as primary authentication/authorization serv.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-16 Set RADIUS accounting p acket en cryption key key accounting string Restore the default RADIUS a.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-17 By default, RADIUS request packet will be retransmi tted up to three times.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-18 Table 40-17 Recommend ed real-time accounting in tervals for differe nt number of users Number of users Real-time accounting interval in minutes 1 to 99 3 100 to 499 6 500 to 999 12 ≥ 1000 ≥ 15 By default, minute is set to 12 minutes.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-19 40.3.9 Enabling/Di sabling Stopping Accounting Request Buffer Because the stopping accounting re.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-20 40.3.11 Setting the Supported Type of RADIUS Server The Switch 8800 support s the stand ard RA DIUS protocol an d the extended RADIUS service plat fo rms, such as IP Hotel, 201+ and Port al.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-21 40.3.13 Setting the Username Forma t Transmitted to RADIUS Server As mentioned above, the supplicant s are gener ally named in userid@isp-name format.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-22 By default, the default data unit is byte and the default dat a packet unit is one packet.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-23 Configuring TACACS + Au thentication Servers z Configuring TACACS + Authorization Servers z Conf.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-24 40.4.2 Configuri ng TACACS+ Authentication Servers Perform the following confi guration in T ACACS+ view .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-25 Note: If only authentication and accounting se rv ers are configured and no authorization se.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-26 Table 40-30 Configure stop-a ccounting packet retransmi ssion Operation Command Enable stop-acco.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-27 Table 40-32 Set a key for securing the communication with the T ACACS+ server Operation Command .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-28 40.4.9 Setting Timers Re garding TACACS Server I. Setting the response timeout timer Since T ACACS+ is implemented on the basis of TCP , server resp o nse timeout or TCP timeout may terminate the connection to the T ACACS server .
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-29 Table 40-37 Set a real-time accounting interval Operation Co mmand Set a real-time accounting in.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-30 Operation Command Display related information of use r ’s connectio n display connection { acc.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-31 Operation Command Enable debugging of local RADIUS authentication server debugging local-s erver.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-32 II. Network Topology Authentication Servers ( IP address:10.110.91.164 ) Internet Switch telnet user Internet Figure 40-4 Network diagram for the re mote RADI US authentication of Telnet users III.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-33 40.6.2 Configuring Auth entication at Local RADIUS Authentication Server Local RADIUS authentication of T elnet/FTP users is similar to the remote RADIUS authentication described i n section 40.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-34 III. Configuration procedure Configure the T elnet user . Here it is omitted. Note: The configuration of the FTP and T elnet users can refer to User Interface Configuration of Getting Sta r t e d Operation section of this manual.
3Com Switch 8800 Configurati on Guide Chapter 40 AA A and RADIUS/T ACACS+ Protocol Con figuration 40-35 z There might be some communi cation fault betwe en NAS and RA DI US/TACACS + server, which can be di scovered throug h pinging RADIUS/TACAC S+ server from NAS.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-1 Chapter 41 VRRP Configuration 41.1 Introduction to VRRP Virtual Route r Redundancy Protocol (V RRP) is a fau lt-tolerant protocol. In gene ral, a default route (for example, 10.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-2 Ether net Master Host 1 H ost 2 Host 3 10.100.10.7 10.100.10.8 10.100.10.9 Virtual IP address10.100.10.1 Network Backup Virtual IP address10.100.10.1 Actual IP address10. 100.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-3 41.2.1 Enabling/Disabli ng the Function to Ping the Virtual IP Address This operation enables or disables the func tion to ping the virtual IP address of the virtual router .
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-4 Due to the chips inst alle d, som e switche s support mat chin g one IP address to multiple MAC addresses.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-5 The virtual - a ddress can be an unused address in t he network segment whe re the virtual router resides, or the IP address of an interface in the virtual router .
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-6 is higher than that of the cu rrent Maste r switch. Acco rdingly , the former Maste r switch will become the Backup switch. T ogether with preemption settings, a delay can also be set.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-7 to authenticate the VRRP packet s. In this case an authenticatio n key not exceeding 8 characters should be configured. Those packet s failing to p ass the authenticati on will be discarded and a trap p acket will be sent to the network managem ent system.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-8 Table 41-8 Configure virtual router tim er Operation Command Configure virtual router timer vrrp vrid virtual - router - ID .
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-9 41.3 Displaying and debugging VRRP After the above configurati on, execute display command in any view to display the running of the VRRP configuration, and to verify the conf iguration.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-10 II. Networking diagram Vi rt ual IP addr ess: 2 02.38.1 60.111 Swi tc h_A Hos t A 202.38. 160.3 VLA N- i nterf ac e 2: 202 .38.160 . 1 In t e rne t Sw i tc h_B VLA N- i nt er fa c e2 : 202.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-11 [LSW-B-vlan-interfa ce2] ip add re ss 202.38.160.2 255. 255.255.0 [LSW-B-vlan-interfa ce2] quit Configure VRRP . [LSW-B] vrrp ping -en able [LSW-B] interface vlan 2 [LSW-B-vlan-interfa ce2] vrrp vrid 1 virtual-ip 20 2.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-12 [LSW_A-vlan-interface2] vrrp vrid 1 virtual-ip 202.38.1 60.1 1 1 Set the priority for the virtual router . [LSW_A-vlan-in terface2] v rrp vrid 1 priority 1 10 Set the authentication key for the virtual router .
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-13 switch for virtual router 2 and vice versa for swit ch B. Some hosts employ virtual route r 1 as the gateway , while others employ virtual router 2 as the gate way . In this way , both load balancing and mutual backu p are impleme nted.
3Com Switch 8800 Configurati on Guid e Chapt er 41 VRRP Configurat ion 41-14 41.5 Troubleshooting VRRP As the configuration of VRRP is not very complicated, almost all the malfunctions ca n be found through viewing t he configuration an d debugging info rmation.
3Com Switch 8800 Configurati on Gu id e Chapter 42 HA Configuration 42-1 Chapter 42 HA Configuration 42.1 Introduction to HA HA (high availability) is to achieve a high availability of the system and to recover the system as soon as possible in the event of Fabric failures so as to shorten the MTBF (Mean T ime Between Failure) of the system.
3Com Switch 8800 Configurati on Gu id e Chapter 42 HA Configuration 42-2 z Configuring the Load Mode of the Fabri c and Slave Board 42.2.1 Restarting the Slave System Manually In the environment in which t he sl ave system is available, the user can restart the slave system manually .
3Com Switch 8800 Configurati on Gu id e Chapter 42 HA Configuration 42-3 Table 42-3 Enable/Disab le automati c synchronization Operation Command Enable automatic synchronization slave auto-update config Disable automatic synchronization undo slave auto-update config By default, the automatic synchronization of system is enabled.
3Com Switch 8800 Configurati on Gu id e Chapter 42 HA Configuration 42-4 Caution: When a single Fabric is in position, t he load-balan ce mode is not effective and the Fabric changes to the load-si ngle mo de automatically.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-1 Chapter 43 File System Management 43.1 File System Configuration 43.1.1 File System Overview The Ethernet switch provides a file system module for user’s ef ficient management over the storage devices su ch as flash memory .
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-2 43.1.2 Direct ory Operation The file system can be used to create or del ete a directory , display the current workin g directory , and display the information about the files or di rectories u nder a specified directory .
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-3 Caution: When you use the delete command without the unreserv ed option to delete a file, the file is in fact saved in the recycle bin and still occupies som e of the storage space.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-4 43.1.5 Setting the Prompt M ode of the File System The following command can be used for setting the prompt mode of the current file system. Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-5 will begin the initialization with the default parameters. Relative to the saved-configuration, the configuration in ef fect during the operating process of the system is called current-confi guration.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-6 43.2.4 Erasing Conf iguration Files from Flash Memory The reset saved-configuration comm and can be used to erase configuration files from Flash Memory .
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-7 Note: The system supports FTP se rvices over VPN. 43.3.1 FTP Overview FTP (File T ransfer Protocol) is a universal method for transmitting files on the Internet and IP networks.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-8 T able 43-1 1 lists the config uratio n of the switching as FTP server . Table 43-11 Configuration of the switch as FTP serve r Device Configuration Default Description Start FTP server.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-9 authorized users. Y ou can use the followi ng com mands to configure FTP server authentication and authori zation. The authorizat io n information of FTP server includes the top working directory provided for F TP client s.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-10 43.3.5 Displaying a nd Debugging FTP Server After the above configurati on, execute display command in any view to display the running of the FTP Server configuration, and to verify the effect of the co nfigu ration.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-11 The switch application switch.app i s stor ed on the PC. Using F TP , the switch can download the switch.app from the remot e FTP serve r and upload the vrpcfg.cfg t o the FTP serve r u nde r the switch directory for backup purpose.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-12 Use the put command to upload the vrpcfg.cfg to the FTP server . [ftp] put vrpcfg.cfg Use the get command to download the switch.app fr om the FTP se rver to the Flash directory on the FTP server .
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-13 [SW8800] ftp server enable [SW8800] local-user switch [SW8800-luser-switch] service-type ftp ftp-directory flash: [SW8800-luser-switch] password simple hello 2) Run FTP client on the PC and establish FTP connection.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-14 Switch PC Network Switch Switch PC Network Figure 43-4 TFTP configuration T able 43-17 lists the configuratio n of the swit ch as TFTP client.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-15 43.4.3 Uploading Files by Means of TFTP T o upload a file, the client sends a request to the TFTP server and then transmit s data to it and receives the ac knowledgement from it.
3Com Switch 8800 Configurati on Guid e Chapter 43 File System Management 43-16 <SW8800> system-view [SW8800] Caution: If the Flash Memory of the switch is n ot enough, you need to first delete the existing programs in the Flash Memory and the n upload the new ones.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-1 Chapter 44 MAC Address Table Management 44.1 MAC Address Table Management Overview An Ethernet Switch maint ains a MAC a ddress t able for fast forwarding p a ckets.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-2 Y ou can configure (add o r modify) the MAC add re ss entries manual ly according to the actual networking environ m ent. The entries can be static ones or dynamic one s.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-3 If aging time is set too short, the Ethernet switch may delete valid MAC addre ss table. Y ou can use the following comm ands to set the MAC address aging time for the system.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-4 44.3.1 Maximum MAC Address Number Learned b y a Port and Forwarding Option Configuration Tasks Maximum MAC address n.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-5 Sequence number Configuration item Command Description 5 Set the maximum number of MAC addresses learned by an Ether.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-6 Execute the debugging command in user view to debug MAC address t able configuration.
3Com Switch 8800 Configurati on Guide C hapter 44 MAC Address Table Management 44-7 II. Network diagram Consol e Por t Network Port Switch Internet Figure 44-2 Network diag ram for a ddre ss t able management co nfiguration III. Configuration procedure Enter the system view of the switch.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-1 Chapter 45 Device management 45.1 Device Management Overview With the device managem ent function, the Ethernet Switch can disp.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-2 Table 45-2 Enable the Timing Reboot Fun ction Operation Command Enable the timing reboot function of the switch, and set specif.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-3 45.2.4 Upgrading BootROM Y ou can use followed command to upgrade th e BootROM with the BootROM program in the Flash Memory . This configuration task facilit ates the remote upgrade.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-4 main control boa rd of a 16 MB flash, th e service proce ssing board cann ot be updated according to the original pro cedure.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-5 Display CPU occup ancy display cpu [ slot slot - no ] 45.4 Device Management Configuration Example 45.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-6 Caution: If the flash memory of the switch is no t enough, you need to first delete the exi sting programs in the flash mem ory and then download the new ones to the memory. Enter the corresponding command in use r view to establish FTP connection.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-7 45.4.2 Use the Switch as an FTP Ser ver to Implement the Remote Upgrade I. Network requirements The switch serves as an FTP server and the PC a s an FTP client.
3Com Switch 8800 Configurati on Guide Chapter 45 Device managem ent 45-8 Caution: If the flash memory on the switch is not sufficient, delete the original appli cation program in the flash before uploading th e new one into the flash of the switch. 3) After uploading, performs upgrading on the swit ch.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-1 Chapter 46 System Maintenance and Debugging 46.1 Basic System Configuration The basic system configura t ion and ma nagement include: z Switch name setting z System clock set t i ng z Time zone setting z Summer time setting 46.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-2 Table 46-3 Set the time zone Operation Command Set the local time clock timezone zone_name { add | minus } HH:MM:SS Restore to the default UTC time zone undo clock timezone By default, the UTC time zone is adopted.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-3 Operation Command Display the information about the optical module co nnected with a in-place optical port on current frame display fiber-module or display fiber-module [ interface - type interface - number | interface - name ] 46.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-4 Table 46-6 Enabling/Di sabling the d ebugging Operation Command Enable the protocol debugging debugging { all [.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-5 46.4 Testing Tools for Network Connection 46.4.1 ping The ping command ca n be used to check the net work conne ction and if the host i s reachable. Perform the following configuration in any view .
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-6 46.4.3 tracert The tracert is used for testing the gateways p assed by the p acket s from the source host to the destination one. It is mainly us ed for checking if the netwo rk is connected and analyzing where the f ault occu rs in the network.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-7 The description of the component s of log information is as follows: 1) % In practical output, some of the informati on is sta rted with the % character , which means a logging is ne ce ssary .
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-8 Module name Description DEV Device management module DHCP Dynamic host configuration proto col module DIAGCLI D.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-9 Module name Description MPM Multicast port management module MSDP Multicast source discovery protocol module MS.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-10 Switch information falls into three categories: log information, debuggin g information and trap information. The info-center classifie s every kind of inform ation into 8 severity or urgent levels.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-11 Logging buffer 4 logbuf snmp 5 snmpagent Log file 6 logfile Note: The settings in the 7 directions are ind epende nt from e ach other. Th e settings will take effect only after enabling the information center.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-12 Table 46-15 Send the configuration info rmation to the console terminal. Device Configuration Default val ue Configuration description Enable info-center By default, info-center is enabled.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-13 Table 46-17 Send the configuration info rmation to the log buffer Device Configuration Default val ue Configuration description Enable info-center By default, info-center is enabled.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-14 Set the information output direction to SNMP — — Set information source — You can define which modules and information to be sent out and the time-stamp format of information, and so on.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-15 Table 46-21 Configure to output information to the logho st Operation Command Output information to the loghos.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-16 Every channel has been se t with a default record, whose module n ame is default and th e m od u le n um b er i s 0x ffff 0000. However , for different chan nels, the default record may have different default settings of l og, trap and debugging.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-17 Note: Info-center is enabled by default. After info-c enter i s enabled, system performances are affected when the system processes much information because of information classification and outputting.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-18 may have different default settings of l og, trap and debugging. When there i s no specific configuration reco rd for a modu le in the channel, use the d efault one.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-19 Enable terminal display function of trap information terminal trapping Disable terminal display function of trap information undo terminal trapping 46.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-20 Table 46-31 Define information so urce Operation Command Define information source info - center source { modu.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-21 This configuration will af fect the timest amp of t he displayed information.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-22 1) Enabling info-center Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-23 modu - name spe cifies the module name; default rep resent s all the modules; all represent s all the informat.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-24 Disable info-center undo info - center en able Note: Info-center is enabled by default. After info-c enter i s enabled, system performances are affected when the system processes much information because of information classification and outputting.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-25 Every channel has been se t with a default record, whose module n ame is default and th e m od u le n um b er i s 0x ffff 0000. However , for different chan nels, the default record may have different default settings of l og, trap and debugging.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-26 Note: Info-center is enabled by default. After info-c enter i s enabled, system performances are affected when the system processes much information because of information classification and outputting.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-27 Every channel has been se t with a default record, whose module n ame is default and th e m od u le n um b er i s 0x ffff 0000. However , for different chan nels, the default record may have different default settings of l og, trap and debugging.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-28 Table 46-46 Display and debug info-cen ter Operation Co mmand Display the content of information channel displ.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-29 III. Configuration steps 1) Configuration on the switch Enable info-center [SW8800] info-center enable Set the host with the IP address of 20 2.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-30 kill -HUP 147 After the above operation, the swit ch system c an record informatio n in related log files. Note: To configure facility, severity, filter and t he file syslog.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-31 2) Configuration on the loghost This configuration is performed on the logho st. S tep 1: Perform the following co mmand as the super user (root). mkdir /var/log/SW8800 touch /var/log/SW8800/information S tep 2: Edit file /etc/syslog.
3Com Switch 8800 Configurati on Guide Chapt er 46 System Maintenance an d Debugging 46-32 Note: To configure facility, severity, filter and t he file syslog.conf synt hetically, you can get classification in great detail and filter the information.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-1 Chapter 47 SNMP Configuration 47.1 SNMP Overview By far , the Simple Network Management Protocol (SN MP) has ga ined the mo st extensive applica tion in the co mputer networks .
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-2 A 2 6 1 5 2 1 1 2 1 B Figure 47-1 Architecture of the MIB tree The MIB (Management Information Base) is use d to describe the hierarchi cal architecture of the tree and it is th e set defined by the st andard variables of the monitored network device.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-3 MIB attribute MIB content References DHCP MIB — QACL MIB — ADBM MIB — RSTP MIB — VLAN MIB — Device management — Private MIB Interface management — 47.3 Configuring SNMP The following sections descri be the SNMP configuration tasks.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-4 Table 47-2 Set community names Operation Command Set the community name and the access authority snmp - agent community { read.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-5 Table 47-4 Enable/disa bl e SNMP Agent to send Trap Operation Command Enable the sending of trap(system view) snmp-agent trap .
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-6 Table 47-6 Set the lifetime of Trap message Operation Command Set lifetime of Trap message snmp - agent trap life seconds Restore lifetime of Trap message undo snmp - agent trap life By default, the lifetime of T rap message is 120 seconds.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-7 47.3.8 Setting the Source Address of Trap Y ou can use the following commands to set or remove the sou rce address of the trap. Perform the following configuration in sy stem view .
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-8 47.3.10 Creating/Updati ng View Information or Deleting a View Y ou can specify the view to control the access to the MIB by SNMP manage r . Y ou can use either the predefined views or the self- defined views.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-9 47.4 Displaying and Debugging SNMP After the abov e configuration, execute the display command in any view to display the running of the SNMP configuration, and to ve rify the effect of the configuration.
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-10 II. Network diagram Ethernet NMS 129.102.0.1 129.102.149.23 Figure 47-2 Network diagram for SNM P configuration III. Configuration procedure Enter the system view . <SW8800> system-view Set the community name, group and u s er .
3Com Switch 8800 Configurati on Guid e Chapter 47 SNMP Configuration 47-11 Users can query and configure the Ethernet switch th rough the network manage ment system.
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-1 Chapter 48 RMON Configuration 48.1 RMON Overview Remote Network Monitoring (RM ON) is a ty pe of IETF-defined MIB. It is the most important en hancement to the MIB II st andard.
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-2 Note: Before configuring RMON, you must ens ure that the SNMP agent is prope rly configured. See Chapter 50 SSH Terminal Service for the SNMP agent configur ation. The following sections descri be the RMON configuration t asks.
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-3 Perform the following configuration in sy stem view . Table 48-2 Add/delete an entry to/from the alarm t able Operation Comma.
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-4 Table 48-4 Add/delete an entry to/from t he extended RMON al arm table Operation Command Add an entry to the extended RMON al.
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-5 Delete an entry from the history control table. undo rmon history entry - number History control entry calculates variou s data at th e sampling time interval.Y ou can u se the display rmon history command to view the information of the history control entry .
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-6 Display the event log of RMON display rmon eventlog [ event - number ] 48.4 RMON Configuration Example I. Network requirements Set an entry in RMON Ethernet st atistics t able for the Ethernet port p erformance, which is convenient for network administrato rs’ query .
3Com Switch 8800 Configurati on Guid e Chapter 48 RMON Configur ation 48-7 Packets received according to length (in octets): 64 :644 , 65-127 :518 , 128-255 :688 256-511:101 , 512-1023:3 , 1024-1518:0.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-1 Chapter 49 NTP Configuration 49.1 Brief Introduction to NTP 49.1.1 NTP Functions As the network topology gets more and more complex, it becomes impo rtant to synchronize the clocks of the eq uipment on the whol e network.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-2 z Before synchronizing the system clo cks on Ethernet Switch A and B, the clock on Ethernet Switch A is set to 10:00:00am, and that on B is set to 11:0 0:00am. z Ethernet Switch B serves as an NTP ti me server.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-3 time server of the local equipment. In this case the local Ethernet Switch works as an NTP cli ent. If you set a remote server as a peer of the local Ethernet Switch, the l ocal equipment operates in symmetric a ctive mode.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-4 II. Configuring NTP Peer Mode Set a remote server whose ip address is ip - address as the peer of the local equipment. In this case, the lo cal equipment operates in symmetric active mode.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-5 IV. Configuring NTP Broadcast Client Mode Designate an interface on the local Ether net Switch to receive NTP broad cast messages and operate in bro adcast client mode. The local Ethernet Switch li stens to the broadcast from the server .
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-6 VI. Configuring NTP Multicast Client Mode Designate an interface on the local Ethernet Switch to receive NTP multicast messages and operate in multicast client mod e. The local Ethe rnet Switch listens to the mult icast from the server .
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-7 Table 49-8 Configure NTP authentication key Operation Command Configure NTP authentication key ntp-service authen tication-key.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-8 ntp-service unicast-server or ntp-service unicast-peer command also designates a transmitting interface, use the one designated by them.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-9 server : Allow local NTP time service request an d control query . However , the local clock will not be synchroniz ed by a remote server . peer : Allow local NTP time servi ce request and control query .
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-10 49.4 NTP Configuration Example 49.4.1 Configuri ng a NTP Server I. Network requirements On SW88001, set local clock as the NTP master clock at stratum 2. On SW88002, configure SW88001 as the time server in se rver mode and set the local eq uipment as in client mode.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-11 clock stratum: 16 reference clock ID: none nominal frequency: 100.0000 Hz actual frequency: 100.0000 Hz clock precision: 2^17 clock offset: 0.0000 ms root delay: 0.00 ms root dispersion: 0.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-12 II. Network diagram See Figure 7-2. III. Configuration procedure Configure Ethernet Switch SW88003: Enter system view . <SW88003> system-view Set the local clock as the NTP master clock at stratum 2.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-13 Reference time: 19:21:32.287 UTC Oct 24 2004(C5267F3C.49A61E0C) By this time, SW88004 has been synchronized by SW88 005 and it is at stratum 2, or higher than SW88005 by 1 . Display the sessions of SW88004 and you will se e SW88004 has been con nected with SW88005.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-14 Configure Ethernet Switch SW88001: Enter system view . <SW88001> system-view Enter Vlan-interface2 view .
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-15 their respective Vlan-i nterface2. (Note: SW 88003 support s to configure the l ocal clock as the master clock) II. Network diagram See Figure 7-2. 1) Configuration procedure Configure Ethernet Switch SW88003: Enter system view .
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-16 49.4.5 Configure Authenticati on-Enabled NTP Server Mode I. Network requirements SW88001 set s the local clock as the NTP ma ster clock at stratum 2. SW88002 sets SW88001 as it s time server in server mode and itself in client mode a nd enables authentication.
3Com Switch 8800 Configurati on Gu id e Chapter 49 NTP Configuration 49-17 [SW88001] ntp-service authentication-keyid 42 authentication-mode md5 aNiceKey Configure the key as reliable.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-1 Chapter 50 SSH Terminal Service 50.1 SSH Terminal Service 50.1.1 SSH Overview This chapter introduces th e secure she ll (SSH) feature.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-2 Local swit ch Local Ethernet WA N Ser ver SSH cli ent PC Laptop Laptop Wo r k s t a t i o n Wo r k s t a t i o n Rem ote Eth.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-3 z The server initiates a procedure to authe ntic ate the user. If the server is co nfigured not to authenticate the user, the proces s procee ds to session request phase directly.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-4 Num Item Command Description 2 Entering VTY type of user interface view [SW8800] user- interf ace vt y X X – 3 Configure t.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-5 Num Item Command Description 15 Configure the SSH compatibility mode [SW8800] ssh server compatible _ ssh1x enable Optional By default, the server is compatible with the SSH1.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-6 z The minimum and maximum lengths for the host key and the server key are 512 bits and 2048 bits respectively.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-7 Table 50-5 Configure the updating cycle of the server key Operation Command Configure the updating cycle of the server key s.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-8 Table 50-8 Public key configuration Operation Command Enter the public key view rsa peer-public-key key - name Exit the publ.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-9 While the Generator is running, move your mous e over the blank area of the window.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-10 Convert the file aaa.pub into key configuration data in Hex. Convert the converted result in to the CLI of the switch unit .
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-11 X. Exiting the public key edit view Use this configuration task to return from the public key edit view to the public key view and save the input publi c key .
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-12 50.1.3 SSH Client Configuration The following sections descri be the SSH client configuration ta sks.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-13 Perform the following configuration in sy stem view . Table 50-16 Configure the first-time aut hentication of the server Op.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-14 II. Network diagram Switc h PC SSH clien t Switc h SSH ser v e r PC Figure 50-3 Network diag ram for SSH se rver III.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-15 Note: You can use the default values for SSH aut hentication timeout and retries.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-16 50.1.6 SSH Client C onfiguration Example I. Network requirements As shown in Figure 50-4: z Switch A is used as an SSH client. z Switch B is used as the SSH server , and the IP address is 10.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-17 [SW8800] ssh client first-time enable Access the remote server and perform o peration s. z Employ RSA public key authentication mode, and start using the co rrespondin g encryption algorithm configured.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-18 Table 50-18 Configure the servi ce type to be used Operation Command Configure the service type to be used ssh user username service-ty pe { telnet | sftp | all } Restore the default service type undo ssh user username service-type By default, the service type is telnet .
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-19 Num Item Command Description sftp-client> bye sftp-client> exit 3 Shut down the SFTP client sftp-client> quit Opti.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-20 Perform the following configuration in sy stem view . Table 50-21 Start the SFTP client Operation Co mmand Start the SFTP c.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-21 Operation Command directory ls [ remote - path ] Create a new directory on the server mkdir remote - path Delete a directory from the server rmdir remote - path Note: The dir command and the ls command have the sam e functionality.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-22 Table 50-25 Display help information for clie nt comm ands Operation Command Display help information for client command s help [ command - nam e ] 50.2.4 SFTP Conf iguration Example I.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-23 [SW8800-rsa-public-key] public-key-code begin [SW8800-rsa-key-code] 308186028180739A291ABDA704F5D93DC8FDF84C427463 [SW8800-.
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-24 -rwxrwxrwx 1 noone nogroup 225 Aug 24 08:01 pubkey2 -rwxrwxrwx 1 noone nogroup 283 Aug 24 07:39 pubkey1 drwxrwxrwx 1 noone .
3Com Switch 8800 Configurati on Guid e Chapter 50 SSH Terminal Service 50-25 sftp-client> Exit SFTP . sftp-client> quit Bye <SW8800>.
3Com Switch 8800 Configurati on Gu id e Chapter 51 PoE Configuration 51-1 Chapter 51 PoE Configuration 51.1 PoE Overview 51.1.1 PoE on the Switch The Switch 8800 support s power-over-Ethernet (PoE).
3Com Switch 8800 Configurati on Gu id e Chapter 51 PoE Configuration 51-2 51.1.2 External PSE 4500-A Power System If PSE4500-A power system is t aken as the external power supply of the switch, the po.
3Com Switch 8800 Configurati on Gu id e Chapter 51 PoE Configuration 51-3 Table 51-1 PoE configuration tasks o n the Switch 8800 No Item Command Description 1 Enter sy stem view system-view — 2 Ente.
3Com Switch 8800 Configurati on Gu id e Chapter 51 PoE Configuration 51-4 T o cancel the configurations, use the corresponding undo command s. For details about the parameters, refer to the Com mand Manual .
3Com Switch 8800 Configurati on Gu id e Chapter 51 PoE Configuration 51-5 II. Network diagram Figure 51-1 PoE remote power supplyin g III. Configuration procedure Set the maximum power to 400 W on t he card in slot 3. By default, the power o f each card is full, so the power on the card in sl ot 5 need not be configured.
3Com Switch 8800 Configurati on Guide Chapt er 52 PoE PSU Supervision Config uration 52-1 Chapter 52 PoE PSU Supervision Configuration 52.1 Introduction to PoE PSU Supervision The PoE-capable Swit ch 8800 can moni tor the external PoE PSUs through the powe r supervision module on th e PoE extern al power system.
3Com Switch 8800 Configurati on Guide Chapt er 52 PoE PSU Supervision Config uration 52-2 Note: z You can set the thresholds to any appro priate values in the range, but make sure the lower threshold is le ss t han the upper threshol d.
3Com Switch 8800 Configurati on Guide Chapt er 52 PoE PSU Supervision Config uration 52-3 52.3.1 DC Output Alarm Thres holds Configuration Tasks Table 52-2 DC output ala rm thre sh olds configuration .
3Com Switch 8800 Configurati on Guide Chapt er 52 PoE PSU Supervision Config uration 52-4 [SW8800] poe-power output-thresh lower 45.0 Display the DC output state of the PoE PSUs. [SW8800] display poe-power dc-output state Display the DC output voltage/current value s of the PoE PSUs.
3Com Switch 8800 Configurati on Guide Chapt er 52 PoE PSU Supervision Config uration 52-5 II. Network diagram Figure 52-1 Network diagram for PoE s upe rvisio n configuration III. Configuration procedure Enter system view . <SW8800> system-view Set the overvoltage alarm t hreshold of AC input for PoE PSUs to 264.
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3Com DUA1750-2BAA01をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこには3Com DUA1750-2BAA01の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。3Com DUA1750-2BAA01の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。3Com DUA1750-2BAA01で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
3Com DUA1750-2BAA01を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又は3Com DUA1750-2BAA01の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、3Com DUA1750-2BAA01に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわち3Com DUA1750-2BAA01デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
