3Comメーカー3C16476CSの使用説明書/サービス説明書
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http://www.3com.com/ Baseline Switch 2250 Plus User Guide Installationsanleitung 3C16476CS Part No. 10015237 Rev . AA Published August 2006.
3Com Corporation • 350 Camp us Driv e • Marlborough • MA USA 01752-3064 Copyright © 2006, 3Com Corporation. All rights reserved. No part of this documentation may be repr oduced in any form or .
C ONTENTS A BOUT T HIS G UIDE Conventions 5 Related Documentation 6 Documentation Comments 6 1 I NTRO DUCING THE B ASELINE S WITCH Overview of the Baseline Switch 2250 Plus 7 Features and Capabilities.
Backup Configuration 30 Restore Configuration 30 Firmware Upgrade 31 Initialize 31 Reboot 32 System Access 32 System Time 34 SNMP 34 Configuring VLANs 35 VLAN 36 Forwarding T agged/Untagged Frames 39 .
A BOUT T HIS G UIDE This guide describes how to install your Switch and perform initial management configurations. This guide is intended fo r use by network administa- tors who ar e respon sible for installing and setting up network equi pment. Consequent ly , it assu mes a basic working knowledge of LANs (local ar ea networks).
6 A BOUT T HIS G UIDE Related Documentation In addition to this guid e, each 3Com Baseline Switch 2250 Plus documentation set includes the following: ■ Online Help – Accessible from the Web interface, provides information that helps you perform tasks using the Web interface.
1 I NTR ODUCING THE B ASELINE S WITCH This chapter provides an ov erview of the featur es and capabilities of the 3Com ® Baseline Switch 2250 Plus. It also identifies the cont ents of the Switch package and helps you get to know t he physical features of the device.
8 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH SFP Ports The two SFP ports support f iber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This of fers you the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network.
Physical Features 9 available communication pa ths between switches and to determine the best available path and block le ss optimal path s. For information on configuring B PDU forwar ding and blocking, r efer to “ Span ning T re e ” on page 41 .
10 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH (half-duplex or full-duplex) ar e automatically determined by the capabilities of the connected device. Each port also supports automatic MDI/MDI-X detection and can be connected to eith er a 10BASE-T , or a 100BASE-T X device.
Physical Features 11 Ta b l e 5 10BASE-T/100BASE-TX/1000BASE-T Ports (4) Module Active LEDs The Module Active LEDs show the status of a ny SFP modules that are installed.
12 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH (5) Power LED The Power LED shows the powe r status of the Switch. Ta b l e 7 Power L ED (6) Self-Adhe sive Pads The unit is supplied with four self-adhes ive rubber pads. Do not apply the pads if you intend to rack- mount the unit.
2 I NSTALLING THE S WITCH This chapter contains info rm ation that you need to install and set up the Switch . It covers the following topics: ■ Positioning the Switch ■ Rack-Mount ing or Free-Sta.
14 C HAPTER 2: I NSTALLING THE S WITCH recommend s that you pr ovide a minimum of 25 mm or 1 in. clearance). ■ The air is as free of dust as possible. ■ T empe rature operating limits are not likely to be exceeded. It is r ecommended th at the unit i s installed in a clean, air conditioned environment.
Rack-Mounting or Free-Standing 15 T o rack -mount the Switch: 1 Place the unit the righ t way up on a hard, flat surface with the fr ont facing towar ds you. 2 Locate a mounting bracket over the mounting holes on one side of the unit. 3 Insert the tw o screws supplied in the m ounting kit and fully tighten with a suitable screwdriver .
16 C HAPTER 2: I NSTALLING THE S WITCH Placing Units On T op of Each Other If the Switch units ar e fr ee-standing, up to four units can be placed one on top of the other . If you are mixing a variety of Baseline and SuperSt ack units, the smaller units must be positioned at th e top.
Connecting a Network Device 17 If POST fails, try the following: ■ Power of f the Switch, and then power it on again . Check the Power LED and see if POST was successfully completed. ■ Reset the Switch. See “ Resetting to Factory Defaults ” on page 59 .
18 C HAPTER 2: I NSTALLING THE S WITCH Using SFP T ransceivers The following sections describe how to inser t and remove an SFP transceiver fr om an SFP slot. SFP transceivers are hot-in sertable and hot-swappa- ble. Y ou can remove the m from and insert them into any SFP port wi thout having t o power off the Switch.
Performing Spot Checks 19 CAUTION: SFP transceivers are keyed and can be properly inserted only one way . If the transceiver does not click when you insert it , remove it, turn it over , and then re-insert it. 3 Remove the plastic protec tive cover , if fitted.
20 C HAPTER 2: I NSTALLING THE S WITCH.
3 C ONNECTING TO THE W EB I NTERFACE The Switch has a built-in We b interface that you can use to set the admin password, change the IP addr ess that is assigned to the Switch, and config ure it s advanced settings.
22 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE The Wel come scr een of Discover y appears. Figure 5 Welcome Scr een of Discovery 2 If the computer has multiple network adapters, se lect the adapter that connects the computer t o the Switch, an d then click Next .
Logging On to the W eb Interface 23 Logging On to the Web Interface After the Web int erface loads in your W eb br owser , the first page that appears is the logon screen. On this screen, you need to enter the administration user name and passwor d to gain access to the W eb interface.
24 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE Ta b l e 1 0 lists the available items on the menu. Ta b l e 1 0 Availab le Menu Items Menu Item Description Device Summary Contains tabs that allow you to: ■ Provide a summary of th e Switch’s basic settings and versions of current components.
Navigating the Web Interface 25 Buttons Depending on the screen that is cur rently displ ayed, the following butt ons may appear: ■ Apply – Click to save and apply any changes that you have made ■ Cancel – Click to discard any uns aved changes Link Aggregation Contains tabs that allow you to: ■ Display link aggregation su mmary.
26 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE Accessing the Interface Without Using Discovery The Discovery application wo rks by automatically detecting the IP address th at is assigned to the Switch, and then us ing that address to connect to the Web interface.
4 C ONFIGURING THE S WITCH This chapter provides information on how to configure the Switch’ s advanced features. T opics include: ■ Device Summary Information ■ Administration Sett ings ■ Con.
28 C HAPTER 4: C ONFIGURING THE S WI TCH Figure 9 Device View If you request for technica l as sistance from 3Com Support, you may be asked to print out the information on t his scr een. Polling Interval Enter the interval in second s you would like the Switch to r efr esh.
Administration Settings 29 Administration Settings The Administration menu includes ei ght administration items: ■ IP Setup ■ Backup Configuration ■ Restor e Configuration ■ Firmware Upgrade .
30 C HAPTER 4: C ONFIGURING THE S WI TCH IP Setup T o set the IP ad dress for the Switch: 1 Click Administ ration , then IP Setting on the men u. The IP Settings screen appe ars. Follow the IP Setup Wizard to complete the setup. This wizard can a lso be used to set syste m name, location and contact infor mation.
Administration Settings 31 3 Click Restore to copy the config uration back to the Switch. For security purposes, restorin g the configurat ion does not change the passwor d. Firmware Upgrade The Upgrade facility allows you to install on the Switch any new releases of system firmware that 3Com may make available.
32 C HAPTER 4: C ONFIGURING THE S WI TCH your computer to r e-establish communication with the Switch. Reboot Clicking on Administra tion , then Reboot on the menu has the same effect as power cycling the unit. No configuration information will be lost.
Administration Settings 33 Creat e User This page allows you to create a user and define the access level and passwor d for that user . Figure 17 CreateUser Scr een Modify User This page allows you to modify a user’ s access level and password.
34 C HAPTER 4: C ONFIGURING THE S WI TCH System Time Click Administration , then System Time on the menu. This screen allows you to set the system time.
Configuring VLANs 35 Figure 23 SNMP Add Screen SNMP Remove This page allows you to remove community strings. Figure 24 SNMP Remove Scree n Configuring VLANs A virtual LAN (VLAN) is a collection of network nodes that share the same collisi on domain, regar dless of their physical location or connection point in the network.
36 C HAPTER 4: C ONFIGURING THE S WI TCH VLAN Click Device , then VLAN on the menu. A screen appears with seven tabs that include: ■ Setup ■ Modify VLAN ■ Modify Port ■ Rename ■ Remove ■ Port Detail ■ VLAN Detail Setup Use the Setup screen to cr eate VLANs on the Switch.
Configuring VLANs 37 Figure 26 Modify VLAN S creen 1 Enter a set of VLANs or select all VLANs to configur e, then click Select . 2 From t he drop down menu , select a VLAN to modify .
38 C HAPTER 4: C ONFIGURING THE S WI TCH Rename Use the Rename screen to change the name of a VLAN. Figure 28 Rename Scr een 1 Enter a set of VLANs or select all VLANs to add to the rename list, then click Select . 2 From the list of selected VLANs, choose a VLAN to rename.
Configuring VLANs 39 Port Detail Choose a port t o display the tagg ed and untagge d VLAN memberships it is associated with. Figure 30 Port Detail Screen VLAN Detail Use this screen to display detailed VLAN information. 1 Enter a set of VLANs or select all VLANs to add to the details list, then click Select .
40 C HAPTER 4: C ONFIGURING THE S WI TCH The Switch will only forward a frame to ports that are members (tagged o r untagged) of t he VLAN to which the frame is assigned. If the port is an untagged member , the egress frame will be stripped of the VLAN tag and forwarded as untagg ed.
Configuring VLANs 41 Figure 33 T agged VLAN Configuration T o set up the configuration shown in Figure 33 , do the following: 1 Creat e VLAN2 on both Switch 1 and Switch 2. Y ou need not cr eate VLAN1 since it exists by default. 2 On Switch 1, set the ports that you want to be part of VLAN2 to Untagged .
42 C HAPTER 4: C ONFIGURING THE S WI TCH After all the bridges o n the network have de termined the configuration of their ports, each bridge only forwards traffic between th e Root Port and the ports that are the Designated B ridge Ports for e ach network segment.
Configuring Port Settings 43 Broadcast Storm Use the Br oadcast Storm page to set the Switch’ s broadcast storm control and threshold limits. A broadc ast storm is an incorr ect packet sent out on a network that cau ses most hosts to respond all at once, typically with wrong answers that start the process over again.
44 C HAPTER 4: C ONFIGURING THE S WI TCH Figure 38 Port Administration Summary Screen Detail Use the Detail tab to display detailed port sett ing information for a port. Figure 39 Port Administrati on Detail Scr een Setup Use the Setup tab to configure the port settin gs.
Configuring Port Settings 45 ■ Duplex – Sets the duplex mode of the port. Available options include auto, half, and full. If you modify any of these settings, click Apply to save your changes. Figure 40 Port Administration Setup Scre en Speed/Duplex for 1000 Mbps Connections Y ou cannot pr eset the speed t o 1000 Mbps.
46 C HAPTER 4: C ONFIGURING THE S WI TCH Guidelines for Creating T runks ■ Any port on the Switch can be used for cr eating a trunk. ■ This switch supports a maxi mum of four trunks. ■ Each trunk may contain up to four members. ■ A port may only be a member of one trunk at any one time.
Configuring Port Settings 47 Modify Use the Modify tab reassign port members to a link aggregation gr oup. Figure 43 Link Aggr egation Modify Scr een T o modify a link aggregation gr oup: 1 Select the aggr egation gr oup to modify , then click Select .
48 C HAPTER 4: C ONFIGURING THE S WI TCH the Root Bridge generates BPDUs (Bridge Pr otocol Data Units) on all ports at a regular interval known as the Hello T ime.
Configuring Port Settings 49 Figure 46 Spanning T ree Detail Scr een Setup Use the Setup tab to configur e the spanning tree settings for ea ch port. The following optio ns are available: ■ Status – Enables and disables spanning tree for the port.
50 C HAPTER 4: C ONFIGURING THE S WI TCH Figure 48 Port Mirroring Screen T o set up port mirror ing: 1 Connect a network analyzer to a port. 2 Access the Web interface. Click Port , then Port Mirroring on the menu . The Port Mo nitoring Set up Screen appears.
QoS V oIP T raffic Settings 51 Setup Use the Setup tab to co nfigure the global settings for V oice VLAN. The following options are available: ■ V oice VLAN Status – Enable or disable V o ice VLAN for the switch. ■ V oice VLAN ID – Input the V oice VLAN ID for the switch.
52 C HAPTER 4: C ONFIGURING THE S WI TCH Figure 52 QoS Port De tail Scr een OUI Summary Use the OUI Summary tab to display the list of Organizational Uniq ue Identifier fo r a company a nd their description. Figure 53 QoS OUI Summary Screen OUI Modify Use the OUI Modify tab to add to the list of Organizational Unique Id entifier .
Security 53 Security Using the W eb interface, you can configur e the RADIUS Client and 802.1X settings. The Security menu includ es two items: ■ RADIUS Client ■ 802.
54 C HAPTER 4: C ONFIGURING THE S WI TCH Figure 56 RADIUS Client Configur e Screen 802.1X Settings The IEEE 802.1X (dot1x) stand ard defines a port-based access control procedur e that prevents unauthorized access to a network by r equiring users to first submit credentials for authenticatio n.
Security 55 Setup Use the Setup tab to configur e the 802 .1X authenticaion settings. The following fields are available: ■ System Authentication – Sets the global setting for 802.1X. (Default: Disabled) ■ Operation Mode – Allows single or multiple hosts (clients) to connect to an 802.
56 C HAPTER 4: C ONFIGURING THE S WI TCH Monitoring Using the W eb interface, you can display addr ess table information and cable diagnostics. The Monitoring menu includes t wo items: ■ Address T able ■ Cable Diagnostics Address T able Use the Address T able Summary scr een to display the Address T able information.
Monitoring 57 Diagnostics Use the Diagnostics tab to display ind ividual port information on T est Result, Cable Fault Distance, and Last Update. Figure 62 Cable Diagnostic Scr een.
58 C HAPTER 4: C ONFIGURING THE S WI TCH.
5 T R OUBLESHOOTING This chapter lists some issues th at you may encounter while installing, using, and managing the Switch, with suggested cou rses of corr ective action to take. If you encounter an issue th at is not lis ted her e and you cannot solve it, chec k the 3Com Knowledgebase at http://knowledgebase.
60 C HAPTER 5: T ROUBLESHOOTING Forgotten Static IP Address If you forget the sta tic IP address that you assigned to the Switch and you need to access the Web interface, use the Discovery application to automatically detect the IP address and connect to the interface.
If the Problem Persists 61 Ensure that the connected device has either: ■ Autonegotia tion enabled, or ■ The ports are configur ed for half-duplex operation All ports appear to show continual activity . There may be broadcast storms on the networ k.
62 C HAPTER 5: T ROUBLESHOOTING.
A O BTAINING S UPPORT FOR Y OUR P R ODUCT Register Y our Product W arranty and other service benefits start from the date of purchase, so it is im portant to register your product quickly to ensure you get full use of the warranty and other serv ice benefits available to you.
64 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT at http://eSupport.3com.com/ , or under the Product Support heading at http://www.3com.com/ Software Up grades are the softwar e releases that follow the software version included with your ori gi- nal prod uct.
Contact Us 65 . Country T elephon e Number Asia, Pacific Rim T elephon e T echnical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philippi nes P .
66 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonaire Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Republi c Guate.
B S AFETY I NFORMATION Important Safety Information Please refer to the sa fety informat ion found in th e 3Com Switch Family Safety and Regulator y Informa- tion manual included with t his pr oduct. Y ou can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD-ROM that was included with your switch.
68 A PPENDIX B: S AFETY I NFORMATION.
C T ECHNICAL I NFORMATION Related Standards The 3Com Baseline Switch 2250 Plus has been designed to the following st andards: Environmental Physical Electrical Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab (Gigabit Ethernet), IEEE 802.
70 A PPENDIX C: T ECHNICAL I NFOR MATION.
G LOSSARY 10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE- TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twist ed-pair cable. 1000BASE-LX IEEE 802.3z specification fo r Gigabit Ethernet over 9/125 micr on cor e single-mode fi ber cable.
72 G LOSSARY category 5e cables One of five grades of T wisted Pair (TP) cabling defined by the EIA/TIA-568 standar d. Category 5e can be used in Ethernet (10BAS E-T), Fast Ether net (100BASE-TX) and Gigabit Ether net (1000BASE-T) networks, and can tr ansmit data at speeds of up to 1000 Mbps.
G LOSSARY 73 standar d way for VLANs to communicate acr oss switched networks. IEEE 802.1p An IEEE standa rd for prov id ing quality of service (QoS) in Ethe rnet networks. The st andar d uses packet tags that define up to eight traffic classes and allow s switches to transmit packet s based on the tagged priority value.
74 G LOSSARY Most devices that connec t to a LAN have a MAC address assigned to them as they are used to identify other devices on a netw ork. MAC addresses are 6 bytes long. network A network is a collection of computers and other computer equipm ent that are connected for the purpose of exchanging info rmation or shar ing resour ces.
G LOSSARY 75 developed for the int erco nnection of networks . Originally a UNIX standard, TCP/IP is now supporte d on almost all platforms, and is th e prot ocol of the Internet. TCP relates to the content of the data travelling through a network — ensuring th at the inf ormation sent arriv es in one piec e when it r eaches it s destination.
76 G LOSSARY.
I NDEX Numbers 1000BASE-LX 71 1000BASE-SX 71 1000BASE-T 71 100BASE-TX 71 10BASE-T 71 A auto IP confi guration 29 default IP address 29 default mask 29 autonegotiati on 7 autosensing 7 B bandwidth 71 C.
78 I NDEX changing 32, 34 default (blank) 32 setting 28 physical features 9 port settings configuring 43, 50, 53 ports RJ-45 11 SFP 8, 10 positioning 13 POST 16 powering on 16 power -on self-test See .
R EGULATORY N OTICES FCC S TATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuan t to part 1 5 of the FCC rul es. These limit s are designed to provide reasonable protection against harmful interfere nce when the equipment is operated in a commercial environment.
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ですが、ユーザガイドが果たす重要な役割の一つは、3Com 3C16476CS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 3C16476CS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。
