Cisco Systemsメーカー2940の使用説明書/サービス説明書
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Corporate He adquarters Cisc o Syst ems , Inc . 170 West Ta sman Drive San Jos e, CA 95 134-1706 USA http://www.ci sco.com Tel: 408 526-4000 800 553- NETS (638 7) Fax: 408 526-4100 Catal yst 2940 S witc h S of t w are Configuration Guide Cisco IOS Release 12.
THE SPECIFICATIONS AND INFORMATION REG ARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOU T NOTICE. ALL STATEMENT S, INFORMATI ON, AND RECOMMENDA TIONS IN T HIS MANUAL ARE BELIEVED TO BE ACCURATE BU T ARE PRESEN TED WITHOUT WARRANTY OF ANY KIND, EXPRE SS OR IMPLIED.
iii Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 CONTENTS Preface xix Audienc e xix Pur pose xi x Conv enti ons xx Rela te d Publi cation s xxi Obtain ing Docu mentati on xxi Cisco.
Cont ent s iv Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Abbrevi ating Comma nds 2-4 Using no an d defau lt Forms of Commands 2-4 Underst anding CL I Message s 2-5 Using Comma nd .
Content s v Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Displa ying CMS 3-10 Launching CMS 3-10 Front Panel View 3-12 Topolo gy View 3-14 CMS Icons 3-15 Wher e to Go N ext 3-15 CHA.
Cont ent s vi Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 IP Ad dres ses 5-12 Host Na mes 5-12 Passw or ds 5-12 SNMP Communi ty Str ings 5-13 TACACS+ a nd RAD IUS 5-1 3 Access Mode.
Content s vii Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Underst anding DNS 6-16 Defau lt D NS C onfig urat ion 6-1 7 Setti ng Up DNS 6-1 7 Displa ying the DNS Co nfig ura tion 6-.
Cont ent s viii Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Config urin g TACAC S+ Autho rizati on for Privi leged EXE C Access and Net work Ser vices 7-15 Starti ng TA CACS+ Acc o.
Content s ix Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Config urin g the Host Mo de 8-14 Resett ing th e 802 .1X Conf igurat ion to the Defaul t Values 8-15 Displa ying 8 02.
Cont ent s x Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 CHAPTER 11 Configur ing S TP 11-1 Underst anding Spa nnin g-T ree Fea tures 11-1 STP O ver view 11-2 Spannin g-Tr ee To pol.
Content s xi Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Underst anding Upl inkFas t 12-3 Underst anding Bac kbone Fas t 12-5 Underst anding Et herCh ann el Guard 12-7 Underst andi.
Cont ent s xii Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Intera ctio n wit h O ther F eat ures 13-14 Config urin g a Trunk Por t 13-14 Defin in g the Allo w e d V LA N s on a Tr .
Content s xiii Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 VTP Versi on 14-8 Config urati on Requir ements 14-9 Config urin g a VTP Server 14-9 Config urin g a VTP Clien t 14-10 Di.
Cont ent s xiv Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Config urin g th e Aging Time 16-1 2 Displa ying IGMP Sno oping Informat ion 16-12 Underst anding Mul ticast VLAN Reg ist.
Content s xv Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Methods t o Detect U ni directi onal Li nks 18-2 Config urin g UDLD 18-4 Defaul t UDLD Config urati on 18-4 Config uration .
Cont ent s xvi Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 CHAPTER 21 Configur ing R MON 21-1 Underst anding RMON 21-1 Config urin g RMON 21-2 Defaul t RMON Configur ation 21-3 Con.
Content s xvii Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Config urin g SNMP Gro ups and Us ers 23-8 Config urin g SNMP Not ificat ions 23-10 Setti ng the Age n t Contact and Loca.
Cont ent s xviii Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Config urin g the LACP P or t Prio rity 25-12 Config urin g Hot Standby Ports 25-13 Config urin g the LACP Syst em Prio.
xix Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Preface Audience The Cataly st 2 940 Sw itch Software Configuration Gu ide i s f or the networ k mana ger r e sponsib le for configuring th e Catalyst 2940 switc h, here after ref erred to as th e switc h .
xx Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Preface Conv ent ions Note Th is guide do es not repe at the c oncept s and CLI pro cedure s provided in th e standar d Cisco IOS Release 12 .1 docum entati on. For informa tion ab out the stan dard Cisc o IOS Relea se 12.
xxi Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Pre face Related Publ ications Related Publications These do cuments p rovid e comple te informati on about the swit ch and are a v ailable from this U RL: http://www .cisco.com /univ ercd/cc/td/doc/pr oduct/lan/ca t2940/inde x.
xxii Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Preface Obtain in g Technical Assis ta nce Documenta tion C D-ROM Cisco documentati on and additio nal literature are a v ailable in a Cisco Documentation CD-R OM packag e, w hich ma y have shipped with your produ ct.
xxiii Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Pre face Ob taining Technical Assistance Cisco TAC W ebsite The Cisco T A C website ( http://www .cisco.com/tac ) prov ides onli ne doc ument s and to ols for troublesh ooti ng and re solvin g te chni cal iss ues wi th C isco pr oduct s and t ech nolog i es.
xxiv Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Preface Obtainin g Addi ti ona l Publicat io ns and Info rmatio n Obtaining Ad ditional Public ations and In formation Informa tion ab out Cisco pro ducts, tec hn ologie s, and net wor k solutions is available from various onlin e and printe d source s.
C HAPTER 1-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 1 Overview This chapte r pro vide s these topics about the Catal yst 2940 swit ch softw are: • Feat ures , page 1- 1 • Ma.
1-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Feature s Note Refer to the release notes for the list of Catalyst switches el igible for switch clu stering, includ ing which on es c an be co mmand swi tch es a nd whi ch on es ca n on ly be memb er sw itch es.
1-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 1 Overview Features • Default c onfiguration storag e in Flash memo ry to ens ure that the switc h can be conn ecte d to a n.
1-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Feature s • VLAN Trunking Protoc ol (VTP) fo r reducing ne twork traffic b y restric ting floode d traffic to links dest ined for st ation s rec eiving th e tra ff ic.
1-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 1 Overview Manageme nt Options • Scheduli ng of egress queues— Four egress queues on a ll switch ports.
1-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Managem e nt Optio ns Manageme nt Interface Optio ns Y ou ca n configure an d monitor ind i vidua l switches.
1-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 1 Overview Network Configuration Examples • V ie w a top ology of in terco nnected de vices to identify e xisting switch c lus ters and eli gible switc h es that can joi n a clus ter .
1-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples Small Network C onfiguration Figure 1-1 sh ows a con figuratio n for a net work that ha s u p to 25 us ers . Users in thi s net work r equi re e-mail, f ile-sharing, data base, and Internet a ccess.
1-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 1 Overview Network Configuration Examples W ireless Access Point provides netw ork connecti vity for mobile users. Although the wireless ac cess provid es less bandwidth, it all ows u sers to ha ve netwo rk connecti vity re gardless of th eir location in the of fice.
1-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Netwo rk Conf igurati on Ex amples The work gr oups are cre ate d by cluste ring a ll t he C at aly st swi tch es exce pt th e Ca talyst 4500 s wi tch .
1-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 1 Overview Where t o Go Next Note An ext erna l p ower supply i s requ ire d for IP ph ones a nd the C is co Airon et acc ess poi n t.
1-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Ch ap ter 1 Ov er vi ew Where to Go Nex t.
C HAPTER 2-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 2 Using the Command-Line Interface This ch apt er de scri bes t he Ci sco IOS c omma nd- line int erface ( CL I) that you ca n use to con figure y our Catalyst 2940 switc h s wit ches .
2-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Cisco IOS Comm a nd Mode s Ta b l e 2 - 1 describes the main command modes, ho w to access each one, the prompt yo u see in that mod e, and ho w to exit the mode.
2-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 2 Using the Comm a nd-Line In terface Getting Help Getting Help Y ou can enter a qu es t ion ma rk (? ) at the sy st em pr om pt to d is p lay a list of comman d s a v ailable f or eac h comma nd mode .
2-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Specifyin g Ports in In ter face Confi gura tion Mode Specifying Ports in Inte.
2-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 2 Using the Comm a nd-Line In terface Understanding CLI Messages Understandin g CLI Message s Ta b l e 2 - 3 lists so me e rror me ssage s tha t y ou migh t e ncoun ter w hile using t he C LI to co nfigure you r switch.
2-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using E diting Feature s Recalling Commands T o re call comm ands fro m the hi.
2-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 2 Using the Comm a nd-Line In terface Using Edit ing Featu res T o reconf igure a sp ecif ic lin e to ha ve enha nced e diting.
2-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Using E diting Feature s Editing C ommand Lines that Wrap Y ou ca n use a wra paro und f eature for c om mands t hat extend beyond a singl e l ine on th e scre en .
2-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 2 Using the Comm a nd-Line In terface Searching and Filtering Output of show and m o re Co mm ands After you co mplete the entry , press Ctrl- A to check th e complete s yntax be fore pr essing the Retur n key to e x ecute the comman d.
2-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt er 2 Us i ng th e Com ma n d-L i ne In terfa ce Access ing th e CLI from a Br owse r For inform ation abo ut conf iguring the s witch fo r T elnet acces s, see the “Sett ing a T e lnet Password for a T erm inal Line ” sect ion on pag e 7-5 .
C HAPTER 3-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 3 Getting Started with CMS This chapt er contains t hese sect ions that desc ribe the Clust er Manage ment Suite (CM S) on th.
3-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Unders tan din g CMS Front Panel View The Front Pa nel vi e w displays the Front P anel image of a specif ic set of switches in a cluster .
3-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Understanding CMS • The feat ure bar sh ow s the featur es av ailable for the de vices in yo ur cluster . B y defau lt, the fea ture bar is in stand ard mod e.
3-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Unders tan din g CMS Figur e 3-2 Featur e Bar and Sear ch Windo w Note On ly featur es suppor ted by the devices in your cluster ar e displa yed in the feat ure bar .
3-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Understanding CMS Online help includes thes e featur es: • Feature-spec ific help that giv es ba.
3-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Unders tan din g CMS Guide mode is not av ailable if your switc h access level is read-on ly . For more infor mati on about th e read- only acc ess mode, s ee the “Privilege Lev els” se ction on pa ge 3-6 .
3-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Configuring CMS Access to Older Switches In a Cluster If your clu ster has these member switches r.
3-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Conf igu rin g CMS Operating System and Browser Support Y ou can acces s the CMS inter face b y using the operat ing system s and bro wsers listed in Ta b l e 3 - 3 .
3-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Configuring CMS Solari s For Solaris, Jav a plug-in 1. 4.1 is requir ed to run CMS. Y ou can download the Jav a plug-in an d installati on instruction s from this URL: http://www .
3-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Displa ying CM S Beginn ing in pri vileg ed EXEC mode, follo w these steps to conf igure the HTT.
3-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Displaying CMS Figur e 3-4 S witc h Home P age The Sw itc h Home Page has t hes e tabs : • Express Setup —Open s the Express Setup pa ge Note Y ou can use Expr ess Se tup to a ssign a n IP addr ess t o an u nco nfigured sw itch .
3-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Displa ying CM S Figur e 3-5 CMS Star tu p Report The CMS St a rtup Rep ort has links t hat inst ru ct yo u how to cor re ctly configure you r PC or work st at ion.
3-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Displaying CMS Figur e 3-6 T oolbar The Front P anel vie w displays the fr ont-panel image of th e command switch and other selecte d switches, as sh own i n Figur e 3-7 , and you c an select more switches to be displayed.
3-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Displa ying CM S Topology View When CM S is laun ch ed from a com mand sw itch, th e T opology v iew appea rs by de fault. (T his v iew is av ailable on ly when CMS is la unched fr om a comman d switch.
3-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 3 Getting Star ted with CMS Where t o Go Next • Collapse Cluster—W hen you righ t-clic k a comm and-swi tch icon a nd select Collapse Cluster , the clust er is colla psed and represen ted by a s ingle icon .
3-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 3 Getting Started with CMS Where to Go Nex t.
C HAPTER 4-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 4 Assigning the Switch IP Address and Default Gateway This chapt er describes ho w to create the initial switch conf iguration (for e xample, assig n the switch IP address an d default gateway informa tion) by using a variety of au tomati c and manua l methods.
4-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmatio n The boot loader a lso provid es trap-door access in to the system if the o perating system has problems serious enoug h that i t cannot be use d.
4-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Understand ing DHCP-Ba sed Autoco nfiguration The DHCP prov ides confi guration information to Intern et hosts and internetwo rking de vices.
4-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmatio n Figure 4-1 shows th e sequen ce of mess age s that ar e e xchanged betw een the DHCP c lient an d the DHC P server .
4-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information If you want the switch to rece iv e .
4-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmatio n Configuring the DNS The DH CP ser ver uses the DNS s erv er to reso lve the TF TP serv er name to an IP a ddres s.
4-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information Obtaining Configurati on Files Depen.
4-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Assign ing Swi tch Info rmatio n Example Configuration Figure 4-3 shows a sa mple netwo rk for re trieving IP informat ion by using DHCP-b ased auto configurat ion.
4-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Assigning Switch Information switch2-confg switch3-confg switch4-confg prompt> cat network-confg ip host switch1 10.
4-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Checking and Saving th e Run ning Confi gura tion T o remov e the switch IP addr ess, use th e no ip address interface configurat ion comma nd.
4-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 4 Assigni ng the Swi tch IP Addr ess an d Defa ult Ga tewa y Chec king and Savin g the Ru nnin g Co nfig ur atio n no ip route-cache ! ip default-gateway 172.
4-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 4 Assigning the Switch IP Address and Default Gateway Checking and Saving th e Run ning Confi gura tion.
C HAPTER 5-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 5 Clustering Switches This chapte r provides these topics to help you get started with switch clu stering: • Understa ndin .
5-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Underst an ding Switch Cl us ters Cluster members ar e connected to the comm and switch according to the connect i vity guide lines describe d in t he “ Auto mat ic Di scovery of Cl uste r Ca ndida tes and M embe rs” sec tion on p ag e 5- 3 .
5-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Candidate Switch and Member Switc h Characteristic s Candid ate swi tch es are cluster-capa ble switc hes tha t hav e not yet be en added t o a clus ter .
5-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Foll owi ng these connec tiv ity guidelines ensures auto matic disco ver.
5-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Discovery Through Non-CDP-Capabl e and Noncluster-Capable Devices If a com.
5-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Figur e 5-3 Disco very Thr ough the Same Manag ement VLAN Discovery Thro.
5-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Figur e 5-4 Disco v ery Thr ough Dif f erent M anage ment VLANs with a Lay.
5-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er Figur e 5-5 Disco v ery of Newly I nstalled S witc hes in Dif fer ent Ma.
5-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Note Th e clu ster sta ndby group i s an H SRP g rou p. D isab lin g HSRP di sable s t he c luste r stand by group. The switch es in the clus ter standb y group ar e ranke d accordin g to HSRP prioritie s.
5-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er – When the c ommand switch is a Cataly st 2955 swi tch ru nning Cisc o IOS Rele ase 12. 1(12c)E A1 or later, all stan dby co mman d sw itc hes m ust b e Catalyst 2955 swi tches ru nning Cisc o IOS Release 12.
5-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er Figur e 5-6 VLAN Co nnectivity Betw een Standby -Group Mem bers and Clus .
5-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er IP Addresse s Y ou must as sign IP info rmation to a command switch. Y ou can access the cl uster thr ough the comman d-sw it ch IP a dd ress.
5-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Planni ng a Swit ch Clust er If yo u chang e the mem ber -switch passw ord to be dif fer ent fr om the.
5-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Planning a Sw it ch Cl ust er For more infor mation abo ut CMS access mo des, see the “Pri vilege L ev els” se ction on pa ge 3-6 .
5-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster LRE P rofi les In Cisco IO S Rel ease 12. 1(1 4)EA 1 or lat er, the Catalyst 295 0 L RE sw itch es do no t sup por t pu blic profiles.
5-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Creating a Switch Cluster Note • W e strongly re commen d that the high est-en d, comman d-capa ble switch in the cluster be the comm an d s witc h: – If your switch cl uster has a Catalyst 3550 switch, that switch sho uld be the command swi tch.
5-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster Figur e 5-8 A dd t o Cluste r Window From C MS, the re ar e two ways to add swit ches t o a clus ter: • Select Cluster > Add to Cluster , select a c andidate s witch from th e list, click Add , and c lick OK .
5-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Creating a Switch Cluster Figur e 5-9 Using the T opolo gy V iew to A dd Membe r Sw itches Instead o f using CMS t o add memb er s to the cl uster, you can use the cluster member global conf igura tion command from the comman d switch.
5-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Creati ng a Swit ch Cluster Creating a Clu ster S tandby Group The cl uster s tandb y grou p member s .
5-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Creating a Switch Cluster • When th e comm and swi tch is a Catal yst 2 940 swi tches, al l sta ndby command switches must be Catalyst 294 0 switches.
5-21 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Using the CLI to Manage Switch Clusters Figur e 5-1 1 Inv entory Windo w Step 4 Se lect Reports > In ventory to displa y an in ventor y of the switches in t he clust er ( Figu re 5- 11 ).
5-22 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Using SNMP to Ma nage Sw itch Cl usters The T elnet sessio n accesse s the member -switch CLI at the same pri vile ge le v el as on the comm and swit ch.
5-23 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 5 Clustering Switche s Using S NMP to Ma nage Swit ch Clust ers If a m emb er switc h has i ts own I P a ddr ess a nd co mmuni ty stri ngs, t h ey can be u sed i n addi tio n to the acces s pro vided b y the command switch.
5-24 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 5 Clustering Switches Using SNMP to Ma nage Sw itch Cl usters.
C HAPTER 6-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 6 Administering the Switch This chap ter describ es how to perform one-ti me operat ions to admini ster your Ca talyst 2940 switch.
6-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date The sy stem clo ck can provid e time t o these servi ces: •.
6-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Se v e ral manuf act urer s inclu de NT P softw ar e fo r t heir hos t systems, and a public ly a vailable v er sion f or systems running UNIX and its various deriv ati ves is also available .
6-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Default NTP Configurati on Ta b l e 6 - 1 shows the default NTP co nfigurati on. NTP is enable d on all interfa ces b y defau lt.
6-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e T o di sab le NTP auth en t ica t ion, us e th e no ntp authenticate global co nfigur ation co mm and.
6-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Y ou ne ed to configure onl y one en d of an associat ion; the other device can automa tical ly establ ish the associat ion.
6-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e T o disable the interface fro m sending NTP broadcas t packets, use the no ntp broadcast interface conf igurat ion command.
6-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Creating an Access Gro up and Assigni ng a Basic IP Access Li.
6-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e If the source IP address m atches the access lists fo r more t han one acces s type, the f irst typ e is grant ed.
6-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Beginn ing in pri vile ged EXEC mode, follo w these steps to.
6-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Setting the System Clock If you have an outsid e source on the net work that pr ovides time ser vices, su ch as a n NTP server , you do not need to manuall y set the syste m clock.
6-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the Syste m Time and Date Configuring the Tim e Zone Beginn ing in pri vilege d EXEC m.
6-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Mana gi ng th e S y stem Tim e an d Da t e Configuring Summer Time (Daylight Saving Time) Beginn.
6-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Configur ing a Sys tem Nam e and Prompt Beginning in privileged EX EC mode, fol low these steps .
6-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Confi guring a S ystem Name an d Prompt This se ctio n c onta ins thi s configu ratio n inf or m.
6-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Configur ing a Sys tem Nam e and Prompt Configuring a System P rompt Beginning i n privileged EX.
6-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Confi guring a S ystem Name an d Prompt Default DNS Configur ation Ta b l e 6 - 2 shows the default DN S configur ation .
6-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Creating a Banner domain name is the v alue set b y the ip do ma in- nam e g lo bal c onfigurati on c om mand.
6-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Creat ing a Bann er Configurin g a Mess age-of-the -Day Log in Bann er Y ou can crea te a sin gl e or mult ilin e m essage b anne r t hat a ppea rs on th e scr een when so meo ne lo gs in to the switch.
6-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table Configurin g a Login B anner Y ou c an co nfigur e a l og in ba nner t o be di spla yed on al l c onnec ted t ermi nal s.
6-21 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Managin g the MAC Addre ss Table This se ctio n c onta ins thi s configu ratio n inf or mat ion:.
6-22 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table Default MAC Address Table Configuration Ta b l e 6 - 3 sho ws the default MAC address table con figuration.
6-23 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Managin g the MAC Addre ss Table Removi ng Dyn amic Ad dre ss E ntries T o re move all dynami c en tries, use the c lea r ma c ad dress- tab le dy nami c comman d in pr ivileged EXEC mode.
6-24 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the MAC A ddre ss Table T o di sable the sw itch from se nding MAC address notificati on traps, use the no snmp-serv e r enable traps mac-notification global con f igura tion co mman d.
6-25 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 6 Adminis ter ing the Switch Managin g the MAC Addre ss Table Adding and Remo ving Sta tic Address E ntries A static address has these characteristics: • It is manu ally en tered in th e address t able an d must be manu ally removed.
6-26 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 6 Administering the Switch Managin g the ARP Table Displaying A ddress Table Entries Y ou ca n display th e MA C addre ss t.
C HAPTER 7-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 7 Configuring Switch-Based Authentication This chapter describes ho w to conf igure switch-based authen tication on the Cata lyst 2940 switch.
7-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Protecting A ccess to Privileged EXE C Comman ds Protecting Access to Privileged EXEC Command s A simpl e way of p rovidin g te rmi nal acces s c ontr ol i n you r netwo rk i s to use p ass words a nd as sign privilege lev els.
7-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Setting o r Changin g a Static Enab le Pa ssword The en able password control s access to the privileged EXEC mode.
7-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Protecting A ccess to Privileged EXE C Comman ds Protecting En able and E nable Se.
7-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds If bo th the en able and e nable sec ret pas sword s are de f ined, us ers must enter th e enable s ecret p asswo rd.
7-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Protecting A ccess to Privileged EXE C Comman ds T o remov e the passwor d, use the no password glob al configur ation comm and.
7-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Prote c ting Acce ss t o Priv i lege d EX EC Co mman ds Configuring Multiple Privilege Level s By default, the Cisco IO S software has two modes of passwor d security: use r EXEC and privileged EXEC.
7-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Protecting A ccess to Privileged EXE C Comman ds When y ou set a command to a pr i vile ge le vel, all co mmands whose s yntax is a subs et of th at com mand are al so set to th at le vel.
7-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with TACACS+ Logging into and Exiting a Privilege Leve.
7-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controlling Sw itch Acce ss w ith TACACS+ The goal of T A CA CS+ is to provide a method for man aging multiple network a ccess points from a single manageme nt ser vice.
7-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with TACACS+ The T ACA C S+ pr otoc ol pr ovides a ut.
7-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controlling Sw itch Acce ss w ith TACACS+ authorize, or to keep accounts on users; if that meth od does not respond, the software selec ts the next method in the list.
7-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with TACACS+ T o remov e the specif ied T A C A CS+ serve r name or address, use the no tacacs- server ho st hostna me global configurat ion comm and.
7-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controlling Sw itch Acce ss w ith TACACS+ Beginn ing in pri vilege d EXEC mode, follo w th ese steps to conf igure login au thenticatio n: Comma nd Pu rpos e Step 1 configur e terminal Enter globa l configurati on mode.
7-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with TACACS+ T o disa ble A AA, use t he no aaa new-model glob al co nfigurati on comm a nd.
7-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS Starting TACACS+ Accounting The AAA acco unting feature tracks th e services that users are acces sing an d the amoun t of netwo rk resources th at the y are co nsuming.
7-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Understanding RADIUS RADIUS is a distr ibu ted client /serv er system that secures netw orks ag ainst una uthorized access.
7-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS Figur e 7 -2 T ransitioning fr om RADI.
7-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Configuring RADIUS This se ctio n de scri bes how to c onfigure your sw itch to su ppo rt R ADI US.
7-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS Y ou iden tif y R A DIUS secu ri ty s er vers by the ir host na me or I P a ddre ss, host na me a nd spe c ific UDP port num bers, or t heir I P addre ss and spec ific UDP port numb ers.
7-21 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Beginning i n privileged E XEC mo de, foll ow these s teps to c on figure p er-server R ADI US ser ver comm unicatio n.
7-22 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS This example shows ho w to configure h.
7-23 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Step 3 a aa authent ication login { default | list-name } method1 [ meth od2 ... ] Create a login auth entic ation meth od list.
7-24 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS T o disa ble A AA, use t he no aaa new-model glob al co nfigurati on comm a nd.
7-25 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Be ginning in pri v ile ged EXEC mode, fo.
7-26 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS T o remov e the specif ied RADIUS serve r , u se the no radius-serv er host hostname | i p-add r ess global configurat ion comm and.
7-27 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS Beginn ing in pri vile ged EXEC mo de, fo.
7-28 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS Configuring Settings for All RADIUS S .
7-29 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Controlling Switch Access with RADIUS For ex ample, this A V pair acti vates Ci.
7-30 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Controllin g Switch A cce ss wit h RA DIUS Beginning i n privileged EXEC mode, f .
7-31 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 7 Configuri ng Sw itch-Ba sed Auth entication Configuring the Switch for Local Authentication and Authorization Configuring t.
7-32 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 7 Configuring Switch-Based Authentication Configur ing the Switc h fo r Local Au thentica tion and A uthorizat ion.
C HAPTER 8-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 8 Configuring 802.1X Port-Ba sed Authen tication This c hapt er d escri bes how to c onfigure I EE E 802 .1X por t-ba sed a uth en tic ation o n the Cat al yst 2 940 switch to pre ve nt unauthorized devi ces (clients) from ga ining access to the netw ork.
8-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Unders tan ding 802.1X Port -Based A ut henticat io n Device Roles W ith 802.1X por t-bas ed authentic ation, the de vices in the netw ork ha ve speci fic ro les as sho wn in Figure 8-1 .
8-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Understandi ng 802.1X P ort-Based Aut henticat ion Authentication Initiation and Message Exchange The swi tch or th e client can initi ate authen tication.
8-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Unders tan ding 802.1X Port -Based A ut henticat io n Ports in Au thorized and Un authorized S tates The switc h port state determi nes whet her or not the client is gran ted acces s to the net work.
8-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Understandi ng 802.1X P ort-Based Aut henticat ion In a po in t-to- point configur ati on (se e Figu re 8-1 on pa ge 8-2 ) , only one cli ent can be connec ted to the 802.
8-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Configur ing 80 2. 1X Au thent ica tion Configuring 802.1X Authent ication These sec tions de scri be how t o con figure 8 02.
8-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication Retran smission ti me 30 seconds (nu mber of seco nds that the switch should wait for a response to an EAP request/iden tity frame from the c lient bef ore resen ding the reque st).
8-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Configur ing 80 2. 1X Au thent ica tion 802.1X Configuration Guidelines These ar e the 80 2.1X aut henti cation co nfigurati on guid elines : • When 802.
8-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication global c onfi guration c ommand.
8-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Configur ing 80 2. 1X Au thent ica tion T o disa ble A AA, use t he no aaa new-model glob al co nfigurati on comm a nd. T o disa ble 80 2.
8-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication T o delete the specif ied RADIUS serv er , use the no ra diu s- server h ost { hostnam e | ip-add r ess } global configurati on comm a nd.
8-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Configur ing 80 2. 1X Au thent ica tion Beginn ing in pri vileged EXE C .
8-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication T o return to the def ault quie t time, use the no dot1x time out quiet -peri od interface con figu ration comm and.
8-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Configur ing 80 2. 1X Au thent ica tion This e xample shows h ow to set .
8-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 8 Configuring 8 02.1X Port-B as ed Authen ti cat ion Configuring 802. 1X Authent ication W ith the multiple-hosts mode enabled, you can use 802.
8-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 8 Configur ing 802. 1X Port-Bas ed Authen tication Display ing 802.1 X Stat is t ics and Status Displaying 802.1X St atistics and Status T o display 80 2.1X stati stics fo r all interf aces, use the show dot1x all statistics pri vil ege d EXEC command.
C HAPTER 9-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 9 Configuring the Switch Interfaces This c hapt er d escrib es the types of int erfaces on a Ca taly st 29 40 switc h an d h ow to c onfigure them.
9-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Underst an ding In te rface Type s Access Ports An access por t belongs to an d carri es the traffic of only one VLAN (unless it is configu red as a voice VLAN port) .
9-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Unde rsta ndi n g In t erf ac e Ty p es Port-Based VLANs A VLAN is a switched netwo rk that is logically segmented b y function, team, or application, witho ut reg ard to the physic al location of the user s.
9-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd Figur e 9-1 Connec ting VLANs with La y er 2 S witche s U.
9-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Using the Interface Command Procedures for Configuring In terfaces These ge neral instruc tions apply to all interfa ce conf iguration processes.
9-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd 5 minute output rate 1000 bits/sec, 2 packets/sec 2832963.
9-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Using the Interface Command Beg i n ni n g i n p r iv i l eg ed E X E C m o d e , fo l.
9-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Using the Inter fa ce Comma nd *Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/.
9-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Using the Interface Command Use the no de fine interface-range macr o_ name global conf iguration comm and to de lete a macro .
9-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Configur ing Ethernet Int erfaces Configuring Eth ernet Inte rfaces The swit ch support.
9-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Ethernet Interfaces Configuring In terface Sp eed and Du plex M ode The 1 0/100 Ethern et int erface s on the sw itch o perate i n 10 or 1 00 Mbp s and i n either full- o r half- duplex mode.
9-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Configur ing Ethernet Int erfaces Setting the Interface Speed and Duplex Pa rameters Be.
9-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Configuring Ethernet Interfaces Configuring Auto-MDIX on an Interface When autom atic.
9-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Monito rin g and Mai nt aining th e In terfaces This example shows how to enable Auto-M.
9-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Monitoring and Maintaining the Interfaces Monitorin g Interface an d Controlle r Stat.
9-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 9 Configuring the Switch Interfaces Monito rin g and Mai nt aining th e In terfaces T o clea r th e inte rface coun ter s shown by the show inte rfac es privileged EXEC co mman d, use t he clear counters pri vil eged EXEC comm and.
9-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 9 Configuring th e Sw itch Interf ace s Monitoring and Maintaining the Interfaces This exampl e shows ho w to re-ena ble Fast.
C HAPTER 10-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 10 Configuring SmartPort Ma cros This c hapter d escrib es how to c onfigure and appl y Sma rtPor t m acro s on y our Cataly st 2940 switch.
10-2 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 10 Configuring Smart P ort Mac ros Confi guring Smart -Port Mac ros Default SmartPort Macro Configuration There are no defa ult SmartPo rt macros conf igured on the swi tch.
10-3 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 10 Configuring SmartPort Macros Configuring Smart-Port Ma cros The no form o f the macro name global conf iguration command only delete s the macro def inition. It does not affect th e configurat ion of tho se inter faces on whi ch the ma cro is alre ady app lied.
10-4 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 10 Configuring Smart P ort Mac ros Displaying SmartPort Macros --------------------------------------------------------------.
10-5 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 10 Configuring SmartPort Macros Displaying SmartPort Mac ros.
C HAPTER 11-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 11 Configuring STP This ch apter descr ibes how to co nfigure the Sp anni ng T ree Pr otocol (STP) o n your Catalyst 2940 swit ch. For informat ion about option al spanning -tree features, se e Chapte r 12, “Configuring O pti onal Spanning -Tree Featur es .
11-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Underst an ding Spa nning- Tree Featu res For informat ion about option al spanning -tree features, se e Chapte r 12, “Configuring O pti onal Spanning -Tree Featur es .
11-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res • The br id ge I D of the se ndin g switc h • Message age • .
11-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Underst an ding Spa nning- Tree Featu res Spannin g tree uses the exte nded system ID, the switch prio rity , and the allocated spanning-tr ee MA C addr ess to mak e the bridge ID u nique f or each VLA N.
11-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res Figure 11-1 illustrates ho w an interface mo ves throug h the states.
11-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Underst an ding Spa nning- Tree Featu res Listening State The li stening state i s the fir st state a Layer 2 inte rface enter s after the block ing sta te.
11-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res How a Sw itch or Port Beco mes th e Root S witch o r Root Port If all switches in a netw ork are enabled with default spanni ng-tree settings, th e switch with the lo west MA C address becomes the root switch.
11-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Underst an ding Spa nning- Tree Featu res Figur e 1 1 -3 Spannin g T r ee and Redun dan t Conne ctiv ity Y ou ca n also creat e redund ant links be tween swit ches by using Ethe rChannel groups.
11-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Unders tanding Spanni ng-Tree Featu res Span ning- Tr ee Mo des a nd Pr ot ocols The sw itch supp orts PV ST+. T his span ning -tree mode i s based on th e IEEE 802.
11-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s When you c onnect a Cis co switch t o a non-Ci sco device throug h an 802 .1Q tru nk, the Cisco s witch uses PVST+ to prov ide spanning-tree interoperability .
11-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing S panning- Tree Features STP Configuration Guidelines Y ou ca n disabl e STP on one of the VLAN s and then e nable it on the VLAN whe re you want it to run .
11-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Beginning in privileged EXEC mo de, follow these steps to di sable STP on a per-VLAN basis: T o r e -ena ble spa nnin g t ree , use th e spanning-tree vlan vlan-id glob al con figuration co mman d.
11-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing S panning- Tree Features Use the diameter ke yword t o sp eci fy t he La yer 2 networ k d iam ete r (tha t is , t he max i mum n umb er o f switch hops b etw een a ny two end stat ion s in t he L ayer 2 network ).
11-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Configur ing a Se co ndar y R oot S witch When you con f igure .
11-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing S panning- Tree Features Beginn ing in pri vilege d EXEC mode, follo w th ese steps to conf igure the port prior ity of an interfac e.
11-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Configuring the Path Cost The spanni ng-tr ee path c ost defaul t v alue i s derived from the med ia speed of an i nterface.
11-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing S panning- Tree Features T o return the interfa ce to it s def ault setting, use the no spanning-tree [ vlan vlan-id ] cost interf ace configurati on comm a nd.
11-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing Span ning-T ree F eature s Configuring Spanning-T ree Timers T ab le 11-4 descr ibes th e timer s that af fect th e entir e spann ing-tree perfo rmanc e.
11-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 11 Configuring STP Configur ing S panning- Tree Features Configuring th e Forwarding-Dela y Time for a VLAN Beginning i n privileged E XEC mo de , fol low these s teps t o con figure t h e for war ding -de lay ti me for a VLAN.
11-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 11 Configuring STP Displaying the Spannin g-Tree Stat us Displaying the Sp anning-Tre e Status T o display th e spannin g-.
C HAPTER 12-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 12 Configuring Optional Spannin g-Tree Features This cha pter descri b es how to configure opt iona l span ning- t ree fea tu res.
12-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Underst an ding O pti on al Spann ing -Tree Fe atures Por ts co nnect ed to a singl e wo rkst atio n or s erve r sho uld n ot rec ei v e bri dge pr otoc ol dat a uni ts (B PDUs) .
12-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res The BPDU guard feat ure pr ovides a secur e response t o in valid configurati ons becau se you must manual ly put the por t back in service.
12-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Underst an ding O pti on al Spann ing -Tree Fe atures Figu re 12-2 Sw.
12-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 12-3 UplinkF ast.
12-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Underst an ding O pti on al Spann ing -Tree Fe atures The swi tch tries to determine if it h as an al ternate pa th to the r oot switch.
12-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Unders tanding Opt ional Spanning- Tree Featu res Figur e 12-6 Bac kboneF .
12-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Underst an ding O pti on al Spann ing -Tree Fe atures If the switc h .
12-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Understand ing Loop Guard Y.
12-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Configur ing Optiona l Spanning- Tree Fea tures Optional Spa nning-T.
12-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Enabling BP DU Guard (Opti.
12-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Configur ing Optiona l Spanning- Tree Fea tures Cautio n Configure P.
12-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures Beginn ing in pri vilege d EXEC mode, follo w th ese steps to enable Up linkFast.
12-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Configur ing Optiona l Spanning- Tree Fea tures T o disa ble t he Backb oneF ast featu re, u se the no spanning-tre e backbonefast global configurat ion comm and.
12-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 12 Configuring Op tiona l Spa nni ng-Tree Features Configurin g Optional Spanni ng-Tree Fe atures T o dis abl e root gua rd, u se the no spanning-tr ee guard inter face conf iguration command.
12-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 12 Con figuri ng Opti onal Sp anning-Tr ee Feat ures Displaying the Spannin g-Tree Stat us Displaying the Sp anning-Tre e.
C HAPTER 13-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 13 Configuring VLANs This ch apter des cribes how to configu re the supp orte d four nor mal-r ange VLANs (VLAN I Ds 1 to 1 005) on your Ca talyst 2940 s wit ch. Th is cha pter incl udes in forma ti on ab out V LAN mode s and t he V LA N Membership Polic y Serv er (VMPS) .
13-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Underst a n ding VLAN s Figure 13-1 shows an exam ple of V L ANs segmented into l ogica lly defined n etwor ks. Figur e 13-1 VLANs as Logically Defined Netw ork s VLANs are of ten assoc iated with IP su bnetw orks.
13-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Unde rst an din g VLA Ns VLAN Port M embership M odes Y ou c onfigure a por t to belo ng to a VLA N by assigni ng a memb ership mo de that dete rmines th e kind o f traf fic the port c arries and t he number of V LANs to which i t can belon g.
13-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing Normal- R ang e VLAN s Configuring Normal -Range VLANs Normal- range VL A Ns are VL ANs with VLA N I Ds 1 to 1005 .
13-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri ng Norm a l-R an ge VLAN s • Creatin g or Modify ing an Eth erne t VLAN, page 13-7 • Del.
13-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing Normal- R ang e VLAN s VLAN Configuration in config- vlan Mode T o access co nfig-v lan mode , enter the vlan gl obal co nfigurati on co mman d with a VLA N ID.
13-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri ng Norm a l-R an ge VLAN s Default Ethernet VLAN Configuration T ab le 13-2 shows the def ault conf iguration for Ethe rnet VLANs. Note The switch suppo rts Ethe rnet interf aces exc lusi v ely .
13-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing Normal- R ang e VLAN s T o return the VLAN name to the defa ult settings, use th e no vlan name , no vlan mtu , or no remote span config-vl an co mman ds.
13-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri ng Norm a l-R an ge VLAN s Note Y o u ca nnot configu re an RSP A N V LAN in VL AN databa se configura tion m od e.
13-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing Normal- R ang e VLAN s Assigning S tatic-Ac cess Ports to a VLAN Y ou can assi gn a s ta.
13-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Displaying VL ANs Displaying VLANs Use th e sho w vl an p ri vile ged EXE C command to disp lay a list of all VLANs on th e switch. The di splay include s V LAN st atus, p orts, and c onfigura tion i nf orma tio n.
13-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing VLAN Trunk s Figure 13-2 shows a network of swit ches that are conn ected by 802.1Q trunks. Figur e 13-2 Catal yst 2940, 2900 XL, and 3 500 XL S witche s in a 802 .
13-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s 802.1Q Configuration Considerations 802.1 Q trunks impos e these lim itations on t he trunkin g strategy for a net work: • In a network of Cisco swi tches con necte d throug h 802.
13-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing VLAN Trunk s Configuring a n Ethern et Interface as a Trunk P ort Because t runk po rts .
13-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s T o return an interfac e to its default conf iguration, use the defaul t interface interface-id interface configurat ion com mand.
13-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing VLAN Trunk s Defining the Allowed VLANs on a Trunk By default, a trunk port sends traf fic to and recei ves traf fic from all VL ANs. All VLAN IDs, 1 to 1005, are al lo wed on each t runk.
13-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s This e x ample sho ws how to remo ve VLAN 2 fr om the al lo wed VLAN lis.
13-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing VLAN Trunk s Beginning i n privileged EX EC mo de, foll ow these s teps to c onfigure th e nat iv e VL AN on an 8 02.
13-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Config uri n g VL AN Tr unk s In thi s way , Trunk 1 c arri es tr affic for VLA Ns 8 thr oug h 10 , a nd T runk 2 car rie s tra ffic for VLA Ns 3 through 6.
13-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configur ing VLAN Trunk s Load Sharing Using STP Path C ost Y ou ca n configure para llel trunks t o share VLAN traff ic by setting different pa th costs on a trunk an d associ ating the path costs with dif feren t sets of VLA Ns.
13-21 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Configuring VMPS Beginn ing in pri vileged EXEC mode, follo w these steps to conf igure th e netw o r .
13-22 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configuring VMPS • “Mon itori ng t he V MPS” sect ion on pa ge 13-28 • “Troubleshoot ing Dy.
13-23 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Configuring VMPS If the link goes do wn on a d ynamic port, the por t returns to an isolated state and does not be long to a VLAN.
13-24 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configuring VMPS ! address <addr> vlan-name <vlan_name> ! address 0012.2233.4455 vlan-name hardware address 0000.6509.a080 vlan-name hardware address aabb.
13-25 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Configuring VMPS VMPS Configuration Guidelines These gui deline s and restric tions appl y to dynamic a ccess port VL AN mem bership: • Y ou shou ld c onfigure the VM PS b efore you c onfigure po rt s as dyn am ic.
13-26 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configuring VMPS Note Th e swi tch por t that is c onn ect ed t o the VMPS se rver ca nno t be a dy na mic a cce ss po rt. It ca n be e it her a stat ic ac cess po rt or a tr unk por t .
13-27 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Configuring VMPS T o return an interfac e to its default conf iguration, use the defaul t interface interface-id interface configurati on comm and.
13-28 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configuring VMPS Changing the Retry Count Beginn ing in pri vileg ed EXEC mode, follo w these steps t.
13-29 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 13 Configuring VLA Ns Configuring VMPS This i s a n exam ple of out put for th e show v mps privileged EXE C c om mand : Switch# show vmps VQP Client Status: -------------------- VMPS VQP Version: 1 Reconfirm Interval: 60 min Server Retry Count: 3 VMPS domain server: 172.
13-30 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 13 Configuring VLANs Configuring VMPS Figur e 13-5 Dynami c P or t VLAN Membe rship Conf iguration Primar y VMPS Ser ver 1 Secondar y VMPS Ser ver 2 Secondar y VMPS Ser ver 3 172.
C HAPTER 14-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 14 Configuring VTP This c hapt er d escri b es how to us e t he V LAN Trunking Pr otoc ol ( VTP) a nd t he V LAN dat aba se for managing VLANs on you r Catalyst 2940 switch.
14-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Underst an ding VTP The VTP Do main A VTP do ma in ( also c alle d a VLA N ma nage ment domai n ) con sis ts of o ne sw itch or several interconn ected swit ches under th e same a dministrati ve responsibili ty sharing the same VTP d omain name.
14-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Understanding VTP VTP Mode s Y ou ca n configure a supp orted switc h to be in one of the VTP mod es listed in Ta b l e 1 4 - 1 .
14-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Underst an ding VTP • MD5 diges t VLAN co nf igurat ion, in clud ing max imum tr ansmi ssion unit (M TU) si ze fo r each VLAN.
14-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Understanding VTP Figure 14-1 shows a switche d network w ithout VTP pr unin g en able d. Port 1 on Swi tch 1 and Port 2 on Switch 4 are assi gned to the Red VLAN.
14-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Conf igu rin g VTP VTP pruning is not designed to func tion in VTP transparent mode . If one or more switches in the netwo rk are in VTP transparen t mode, yo u should do on e of thes e: • T urn off VTP prun ing in the en tire network .
14-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Configuring VTP VTP Configuration Options Y ou ca n configure VTP by using th ese configurat ion mode s.
14-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Conf igu rin g VTP VTP Configuration Guidelines These sec tions descr ibe guid elines you should fol low when implem entin g VTP in your ne twork. Domain Names When co nfiguring VTP f or the first tim e, y ou mu st always a ssign a do main n am e.
14-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Configuring VTP • Do not enable VTP v ersion 2 on a switch unless all of the switches in the same VTP domain are version-2-ca pable . When y ou ena ble versio n 2 on a switch, all of the version-2-ca pable switches in the domain en able ver sion 2.
14-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Conf igu rin g VTP Switch(config)# vtp domain eng_group Switch(config)# vtp password mypassword Switch(config)# end Y ou ca n also use VLA N configuration mode to configure VTP paramet ers.
14-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Configuring VTP Beginn ing in p ri vilege d EXEC m ode, follo w these step s to conf igur e the swi tch as a VTP clien t: Use the no vtp mode glob al configurat ion com mand to re turn the swi tch to VT P server mode.
14-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Conf igu rin g VTP T o return the switch to VTP serve r mode, use the no vtp mode globa l c onfigurati on c om mand.
14-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Configuring VTP Note Y o u can also e nable VTP version 2 by using t he vlan database priv ilege d EXEC c ommand to enter VLAN conf iguration mode and en tering the vtp v2-mode VLAN configurat ion comm and.
14-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Conf igu rin g VTP Beginning i n privileged EX EC mode , foll ow these s te ps t o ver ify an d rese t .
14-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 14 Configuring VTP Monito rin g VTP Monitoring VTP Y ou mon itor V TP by di sp layin g VT P configu ratio n in for matio n: t he dom ain na me, the cur rent VT P revision, and the n umb er of VL AN s.
14-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 14 Configuring VTP Monito rin g VTP.
C HAPTER 15-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 15 Configuring Voic e VLAN This cha pter describ es how to configure the voice VLAN feat ure on yo ur Catalyst 294 0 swit ch. V oice VLAN is referr ed to as an auxi liary VLAN in the Catalyst 6 000 f amily switch d ocumentatio n.
15-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 15 Configuring Voice VLAN Configuring Voic e VL AN Figure 15-1 shows one way to connect a Ci sco 7 960 IP Phone.
15-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 15 Configuring Voice VLA N Configuring Voice VLAN Voice V LAN Con figuration Guide lines These a re the v oice VLAN conf iguration guidel ines: • Y ou shou ld configu re voice VLA N on swi tch a cce ss port s.
15-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 15 Configuring Voice VLAN Configuring Voic e VL AN Configuring Ports to Carr y Voice Traffic in 802.1Q Frames Beginn ing in pri vileg ed EXEC mode, follo w these steps to conf igure a port to carry v oice traf fic in 802.
15-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 15 Configuring Voice VLA N Configuring Voice VLAN Overriding the CoS Pr iority of Incoming Data Frame s Y ou c an con nect a PC o r othe r data d evice to a Cisco 7960 IP Phon e por t.
15-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 15 Configuring Voice VLAN Displa ying Vo ice VLA N T o return the port to its defa ult setting, use the no swit chport priority extend interface co nfiguration comm an d o r th e switchport priorit y extend cos 0 inter face configurat ion comm and.
C HAPTER 16-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 16 Configuring IGMP Sno oping an d MVR This cha pter d escribes h ow to configure In ternet Gr oup Ma nageme nt Prot ocol (IGM P) snoop ing on your Catalyst 29 40 switch, in cluding an applicat ion of l ocal IGMP sn ooping, Mu lticast VLAN Registr ation (MVR).
16-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Underst an ding IGM P Snoopin g the switc h adds the host p ort numb er to the for wardin g table en try; when it recei ves an IGMP Lea ve Group message from a host, it remo ves the host port from the table entry .
16-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Understanding IGMP Snooping An IGMPv 3 sw itc h ca n r ece ive messages f rom a nd forwa rd me ssage s to a device ru nning the So urce Specif ic Multica st (SSM) featu r e.
16-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Underst an ding IGM P Snoopin g Note that the switc h hardware can distin guish IGMP information pack ets f rom other packets for the multicas t group.
16-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Understanding IGMP Snooping When ho sts want to lea ve a multic ast group, they can eith er silently lea ve, or the y can se nd a leav e message .
16-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Configuring IG MP Sn ooping The default learning method is IP mu lticast- source -only lea rning.
16-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Enabling or Disa bling IGM P Sn oopin g By default, IGM P snoopin g is globall y enab led on the swit ch. When glob ally en abled or disabled, i t is also enabled or disa bled in all existin g VLAN interfa ces.
16-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Configuring IG MP Sn ooping listens to only CG M P self-jo in and CGMP prox y-jo in pac kets and no other CG MP packe ts.
16-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Beginn ing in pri vilege d EXEC mode, follo w th ese steps t.
16-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Configuring IG MP Sn ooping This e xample sho ws how to statically conf ig ure a host on an interfa ce and verif y the conf iguration: Switch# configure terminal Switch(config)# ip igmp snooping vlan 1 static 0100.
16-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Snooping Beginning in privileged EXEC mo de, foll ow these steps to .
16-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Displaying IG MP Sn ooping Informa tion Current configuration : 1972 bytes ! version 12.
16-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Displaying IGMP Snooping Information T o d i splay IGM P snoo ping i nfo rmat ion , u se on e or mo re o f th e privileged E XEC c omm an ds in T ab le 16-4 .
16-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Underst an ding Mu lticas t VLA N Registrat ion Understandin g Multicast VL AN Regist.
16-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Underst anding Multicast VLAN Registration as a forwar ding destinatio n of the specifi ed multicast strea m when it is recei ved from the multicast VLAN.
16-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Conf igu rin g MVR MVR elimin ates the need to duplicate tele vision-c h annel multi cast traf fic for subscribers in e ach VLAN.
16-17 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring MVR MVR Configuration Guidelines and Limitations Foll ow these gui delines when conf iguring MV R: • Receiver ports cann ot b e t runk p ort s.
16-18 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Conf igu rin g MVR T o return the switch to its defa ult sett ings, use th e no mvr [ mode | group ip-a ddress | querytime | vlan ] global configurati on comm ands.
16-19 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring MVR T o return the interfa ce to its default setti ngs, use the no mvr [ ty pe | immediate | vl an vlan -id | gro up ] interf ace conf iguration com mands.
16-20 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Disp l ay in g MV R Info rma t ion This is an example of output fro m the show mvr interface privileged EXEC com mand whe n the member keyword is inc lud ed : Switch# show mvr interface fastethernet0/2 members 224.
16-21 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Filtering and Throttling This is an example of output fro m the show mvr interface pri vile ged EXEC command for a specif ied interf ace: Switch# show mvr interface fastethernet0/2 224.
16-22 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Con figur ing IGM P Fil ter in g an d Thr o tt li ng These se ctions describ e ho w t.
16-23 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Filtering and Throttling Beginn ing in pri vilege d EXEC mode, follo w th ese steps to create an IGMP prof ile: T o delete a prof ile, us e the no ip ig mp pro f ile pr ofile number glob al co nfiguration co mman d.
16-24 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Con figur ing IGM P Fil ter in g an d Thr o tt li ng Beginn ing in pri vilege d EXEC .
16-25 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Configuring IGMP Filtering and Throttling Setting th e Maximum Numbe r of IGMP Groups.
16-26 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Con figur ing IGM P Fil ter in g an d Thr o tt li ng – If you c onf igur e the thrott ling act ion as de ny , the entries t hat we re pr e viously i n th e forw ardin g tabl e are n ot rem ov ed b ut are aged out.
16-27 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 16 Configuring IGMP Sno oping and M VR Displaying IGMP Filtering and Throttling Configuration Displaying IGMP Filtering and .
16-28 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 16 Configuring IGMP Snooping and MVR Displaying IGMP Filterin g and Thro tt ling Co nfigurat ion.
C HAPTER 17-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 17 Configuring Port-Base d Traffic Control This chap ter de scribe s ho w to conf igure the port-b ased tr af fic co ntrol fe atures on your Catalyst 2940 switch.
17-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Stor m Control Storm contro l use s one o f these metho ds to m eas.
17-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 17 Configuring Port -B ased Tra ffic Control Configuring Storm Control The outp ut f rom t he show storm-c ontrol privileged .
17-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Protected Po rts Configuring Prote cted Ports Some appl ications re.
17-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Switch# show interfaces gigabitethernet0/1 switchpor.
17-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security The stick y secure MA C addresses do not autom atically become par t of the conf iguratio n f ile, which is the startu p co nf iguration used each time the switch r estarts.
17-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Default Port Security Configuration T ab le 17-2 shows the def ault port security conf iguration for an interface.
17-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security T o return the in terfac e to the default conditi on as not a secure p ort, use the no switchport port -security interf ace co nf igurati on com mand.
17-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty T o disa ble st icky learni ng on an in terfa ce, use the no switchport port-security mac-addr ess sticky interf ace conf iguratio n command.
17-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Configuring Port Security 1 0003.fd62.1d45 SecureConfigured Fa0/5 - 1 0003.fd62.21d3 SecureSticky Fa0/5 - 1 0005.7428.1a45 SecureSticky Fa0/8 - 1 0005.
17-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 17 Configuring Port -B ased Tra ffic Control Confi guring Port Securi ty Beginn ing in pri vilege d EXEC mode, follo w th es.
17-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 17 Configuring Port-Based Traffic Co ntro l Displaying Port-Base d Traffic Cont rol Settings Displaying Port-Based Traffic.
C HAPTER 18-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 18 Configuring UDLD This c hapt er d escri b es how to c onfigure the Un iDi rec tiona l Li n k De tect ion (UD LD) pr otoc ol o n y our Catalyst 294 0 switch.
18-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 18 Configuring UDLD Underst andin g U DLD A unidirectio nal link occurs when ev er traf f ic sent by a local de vice is re cei ved b y its neighbor b ut traf fic from the neighb or is not recei ved by the loca l devic e.
18-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 18 Configuring UD LD Understand ing UDLD • Ev ent-dr iv en detection an d echoin g UDLD re lies on echo ing as its detec tion m echanism .
18-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 18 Configuring UDLD Conf igu ring U DLD Configuring UDLD This se cti on de scri bes how to c onfigure UD LD o n your sw it ch.
18-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 18 Configuring UD LD Configur ing UDLD Enabling UDL D Globally Beginn ing in pri vilege d EXEC mode, follo w th ese steps to .
18-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 18 Configuring UDLD Conf igu ring U DLD T o disa ble UD LD on a non-fiber-optic int erface, use the no udld port interfa ce configu ration command.
18-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 18 Configuring UD LD Displaying UDLD Status Displaying UDLD Status T o displa y the U DLD st atus for the specif ied interf ace o r for all inter faces , use the show udld [ interface-id ] pri vileged EX EC comm and.
18-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 18 Configuring UDLD Displa ying U DLD Statu s.
C HAPTER 19-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 19 Configuring CDP This c hapter de scribe s how to co nfigure Cisco Discovery Pro tocol (C DP) o n your Catalys t 2940 s wit ch.
19-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 19 Co nfigu ri n g CDP Conf igu rin g CD P Configuring CDP These sec tions inclu de CDP con figuration info rmation a nd p.
19-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 19 Configuring CDP Configuring CDP Use the no form of the CDP commands to return to the def ault settings. This e xample sho ws how to confi gure and v erify CDP character istics.
19-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 19 Co nfigu ri n g CDP Conf igu rin g CD P This example shows how to enable CDP if it has been di sabled .
19-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 19 Configuring CDP Monitoring and Maintaining CDP Monitoring and Maintaining CDP T o m on itor a nd m ainta in CDP on yo ur device, p erfor m one o r mor e of t hese ta sks, begi nnin g in privileged EXEC mo de .
19-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapte r 19 Co nfigu ri n g CDP Monito rin g and Mai nt aining CDP.
C HAPTER 20-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 20 Configuring SPAN This c ha pter d esc ribes how to c onfigure Swi t ched Po rt Anal yz er ( S P AN) on your Catalyst 2940 s wit ch .
20-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 20 Configuring SP AN Underst an ding SPAN Figur e 20-1 Example SP AN Configur ation Only traffic that ent ers or le aves source port s c an be mon i tore d by us ing SP A N.
20-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 20 Configuring SPAN Understa nding SPAN Traffic Types SP AN sessions include these traff ic types: • Recei ve (Rx) SP AN—The goal of re cei ve (o r ingress ) SP AN is to monitor as much as pos sible all the pa ck ets recei v ed by the s our ce int erfac e.
20-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 20 Configuring SP AN Underst an ding SPAN • It canno t be a source por t or a reflec tor port.
20-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 20 Configuring SPAN Understa nding SPAN • Ether Channel —Y o u can configure an Ether Channel group as a sou rce port but not as a SP A N destinat ion po rt. Wh en a g rou p is co nfigured a s a SP AN sour ce , t he e nti re g ro up is mo ni tore d.
20-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 20 Configuring SP AN Configuring SPAN Configuring SPAN This sec tion d escribes h ow to configure SP AN o n your switch.
20-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 20 Configuring SPAN Configuring SPAN This example shows how to set up a SP AN session, s ession 1, for moni toring sour ce port tra ff ic to a destinati on port .
20-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 20 Configuring SP AN Configuring SPAN Creating a SPAN Session and Enabling Ingress Traffic Beginn ing in pri vileged EXEC m.
20-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 20 Configuring SPAN Configuring SPAN This exam ple sh ows how to configure th e dest inati on port for i ng ress t raffic on VLAN 5 by u si ng a secu rity de vice that support s 802.
20-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 20 Configuring SP AN Displaying SPAN Status This exam pl e sh ows how to di sabl e rece ived traffic monitor in g on por t.
C HAPTER 21-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 21 Configuring RMON This c hapt er d escri bes how to c onfigure Re mo te N etwork Mo nito ring ( RMON ) on yo ur Cat alyst 2940 switch.
21-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 21 Configuring RMON Conf igu ring R MON Figur e 21 -1 Remot e Monit or ing Example The switc h supports t hese RM ON groups (defined in RFC 1757) : • Statistics (RMON gro up 1)—Collec ts Eth erne t, F a st Etherne t, and Gig abit Ethernet st atisti cs on an interf ace.
21-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 21 Configuring RMON Confi guring RMON Default RMON Configuration RMON is disa bled by default ; no alarms or events are configured .
21-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 21 Configuring RMON Conf igu ring R MON T o disable an alarm, use the no rm on al arm number global c o n figuration c omma nd on ea ch ala rm you configured . Y o u c anno t di sabl e at once a ll t he a la rms tha t yo u c onfigure d.
21-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 21 Configuring RMON Confi guring RMON Configuring RMON Collection on an Interface Y ou must first c onfigure RM ON a lar ms an d events to displ ay co llec tio n inf orma tio n.
21-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 21 Configuring RMON Displa ying RM ON Sta tus T o disa ble t he coll ection of grou p Ethe rnet statistic s, us e the no rmon collection stats inde x i nterf ace configurati on comm a nd.
C HAPTER 22-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 22 Configuring System Message Logg ing This c hapter d escrib es how to c onfigure sy stem messa ge l oggi ng on yo ur Cat alys t 294 0 switc h.
22-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Configur ing System Mes sage Logg ing Configuring Sy stem Me ssage Logging These se.
22-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging This example shows a partial switch system mess.
22-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Configur ing System Mes sage Logg ing Disabling an d Enab ling Me ssage Lo gging Message logging is enab led by de fault. It must be enabled to send messages to any destination othe r than the conso le.
22-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging The logging buffered globa l configur ation comm and c opies l ogging messa ges to a n inte rnal buffer .
22-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Configur ing System Mes sage Logg ing is retu rned. Ther efore , unsolici ted messag es and deb ug command output ar e not inter sperse d with solicited d e vice outp ut and pr ompts.
22-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging Enabling a nd Disab ling Time S tamps on Log M essages By default, log message s are not time-stam ped.
22-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Configur ing System Mes sage Logg ing This example shows part of a logging displa y with sequenc e numbe rs enabled : 000019: %SYS-5-CONFIG_I: Configured from console by vty2 (10.
22-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging The sof tware ge ner ates fou r o ther c a tegories of m essage s: • Error mes sag es about softwa re or hardwa re malfunc tions tha t appea r at lev els warnings through emerge ncie s .
22-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Configur ing System Mes sage Logg ing When the histor y table is full (i t contain.
22-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 22 Configuring Sys te m Message L ogging Config uring Syst em Message Logging Configuring the UNIX System Logging Facility W.
22-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 22 Configur ing System Me ssage Logging Display ing the Log gi ng Configur ation Displaying the Log ging Configuration T o di splay the lo gging c onfiguration and th e con tents o f the log buf fer , use the show logging pri vile ge d EXEC co mmand.
C HAPTER 23-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 23 Configuring SNMP This chapt er describ es ho w to configure the Sim ple Network Mana gement Prot ocol (SNM P) on your Catalyst 2940 swi tch.
23-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Underst an ding SNM P • Using SNMP to Access MIB V ariables, page 23-4 • SNMP Notif ications, page .
23-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Underst anding SN MP Y ou must configure the SN MP agent to use the SNMP version supp orted by the mana gement s tation.
23-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Underst an ding SNM P A com mun ity st ring c an h ave one of t hese at tribute s: • Read-only (R O).
23-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Configuring SNMP T raps are un rel iable bec ause t he r ece iver does no t send an ackn owledgment wh en it rece ives a trap , and the send er canno t determine if the trap wa s recei ved.
23-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Conf igu rin g SNMP SNMP Configuration Guidelines An SNMP gr oup is a tab le th at maps SNMP users to SNM P views. An SNMP use r is a member of an SNMP group.
23-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Configuring SNMP Disabling the SNMP Agent Beginn ing in pr iv ileged EXEC mode, f ollo w these steps to .
23-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Conf igu rin g SNMP Note T o dis able a ccess for an SNMP c ommunity , set th e comm unity string for that com munity to the null string (do not enter a value for th e communi ty string ).
23-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Configuring SNMP Beginn ing in pri vileg ed EXEC mode, follo w these steps to confi gure SNMP on the switch: Command Purpo se Step 1 c onfigure te rmina l Enter global co nfiguration mo de.
23-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Conf igu rin g SNMP Configuring SNMP Notifications A trap manag er is a mana geme nt statio n that recei ves and process es traps. T raps are sy stem aler ts that the switc h gener ates whe n cert ain events occu r .
23-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Configuring SNMP Some noti fication type s can not be c ontr olled wi th the sn mp-se rver ena ble globa l configurati on comm an d, for exampl e, tty a nd udp-port .
23-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Conf igu rin g SNMP The snmp-serv er host co mmand s pecif ies which ho sts rec eiv e the notif ications. T he snmp-server enab le trap command global ly enables the me chanism f or the speci f ied notif ication (fo r traps and informs ).
23-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Configuring SNMP Setting th e Agent C ontact and Location In formation Beginn ing in pri vilege d EXEC .
23-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Conf igu rin g SNMP SNMP Examp les This example shows ho w to enable all versions of SN MP . Th e configurat ion perm its any SNMP manager to access all objects with read-only permissions using the co mmunity string public .
23-15 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 23 Configuring SNM P Disp la yin g S N M P S t at us Displaying SNMP Status T o di spla y SNM P input and o ut put sta tisti.
23-16 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 23 Configuring SNMP Displaying SNM P Status.
C HAPTER 24-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 24 Configuring QoS This chapte r describes ho w to config ure quality of service (QoS) by using stan dard QoS commands. W ith QoS, you can giv e pre fer entia l treatm ent to cer tain types of traffic at the expe nse of other s.
24-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt e r 24 Conf igur ing Q o S Underst andin g Q oS Figur e 24-1 QoS Clas sification La yers in Fr ames and P ack ets All switche.
24-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 24 Configuring Qo S Configur ing Qo S Eac h port on t he sw itch has a singl e r ece iv e que ue buffer (the ingre ss port) for incomi ng traffi c. When an untagged frame arr iv es, it is assigned the v alue of the port as its port def ault priority .
24-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt e r 24 Conf igur ing Q o S Conf igu rin g QoS • By default, the port trust state is not configured.
24-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 24 Configuring Qo S Configur ing Qo S Beginn ing in pr iv ileged EXEC mode, follo w thes e steps to confi gure the port to tr.
24-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt e r 24 Conf igur ing Q o S Conf igu rin g QoS Configuring the CoS Val ue for an Interface QoS assigns the CoS v al ue specif ied with the mls qos cos interfac e conf igu ration c ommand to unta gged frames re ceived on trusted and untrust ed port s.
24-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 24 Configuring Qo S Configur ing Qo S Ho we ver , if a u ser b ypasses the t elephone an d connect s the PC d irectly to the .
24-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt e r 24 Conf igur ing Q o S Conf igu rin g QoS Enabling Pass-Through Mode When the sw itch is i n pass-th rough mode , it use s the CoS value of in coming packets wi thout mo difying the DSCP value and sends the packets from one of the four egress queues.
24-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 24 Configuring Qo S Configur ing Qo S Configuring CoS Pri ority Queues Beginn ing in pri vilege d EXEC mode, follo w these st.
24-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapt e r 24 Conf igur ing Q o S Displa ying QoS Infor mation Displaying QoS Information T o di splay QoS in format ion, us e one .
C HAPTER 25-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 25 Configuring EtherChannels This c hapt er d escri bes how to c onfigure E ther Cha nnel on t he L ayer 2 interfac es of a C ata lyst 2940 switch. E the rChann el provide s fau lt-tol eran t high -sp eed links b etw een swit ches, rout ers, and servers.
25-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Underst an ding Et her Channel s Figur e 25-1 T ypical EtherChanne l Configur ation Each Et h erCha nne l ca n co ns is t of up to eigh t com pa tib ly configur ed Ethe rn et i nte rface s.
25-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Understa nding Et herChann els Figur e 25-2 Relation ship of Ph ysical P orts, Lo gical P ort Cha nnels, and Channel Gr oups When a port joins an Ethe rChanne l, the physic al inter face for that port is shut down.
25-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Underst an ding Et her Channel s Exchanging P AgP Packets Both the auto and desirable P A g.
25-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Understa nding Et herChann els Exchanging LA CP Packets Both the acti v e and passive LA CP mo.
25-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Underst an ding Et her Channel s P AgP sends an d receives P AgP PDU s only from interface s that have P AgP en abled for the auto or desirabl e mode.
25-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Config uring Et herCh annels Figur e 25-3 Load Distr ibution a nd F orwa rding Me thods Config.
25-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Configur ing Eth erChann els Default EtherCh annel Configura tion T ab le 25-2 shows the de fault E the rCh annel co nfigur ation .
25-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Config uring Et herCh annels desirable mode. When c onf igur ing an in terfa ce for LA CP , if.
25-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Configur ing Eth erChann els Step 3 channel-gr oup channel-group- number mode {{ auto [ no.
25-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Config uring Et herCh annels T o re move an interfac e from the Eth erCha nnel gro up, use t he no channel-group interfa ce configurat ion comm and.
25-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Configur ing Eth erChann els T o return E therChannel load bala ncing to the def ault conf iguration, use the no port-channel load-balanc e global con figurati on comm and.
25-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 25 Configuring Eth erCh annels Config uring Et herCh annels Configuring Hot Standby Ports When enabled , LA CP tries to config ure the maximum number of LA CP-compatible ports i n a channel, up to a m ax imu m of 1 6 po r ts .
25-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 25 Config uring Et herChan nels Displaying Eth erChannel, PA gP, and LACP Status Beginn ing in pri vilege d EXEC mode, fol.
C HAPTER 26-1 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 26 Troubleshooting This ch apter descr ibes how to iden tify a nd resol ve Catalyst 2940 sof tware prob lems related t o the Cisco IOS software .
26-2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Using Re covery Procedu res Recovering from Corru pted Softw are Switch software can be cor ru pted du ring an up grade , by downloadin g the wr ong file to the swi tch, and by d eleting the im age f ile.
26-3 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Using Reco very Pr ocedures Step 4 Press th e Mode button, and at the same time, reconnect the po wer cord to the switch. Y ou can r elease th e Mod e b utton a seco nd or two after the LED above port 1X turns off.
26-4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Using Re covery Procedu res Press Return in response to the confirmation pr ompts. The co nf iguration file is no w reloaded, and yo u can us e the follo wing norma l comman ds to chang e the password.
26-5 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Using Reco very Pr ocedures Replacing a Failed Command Switch with a Cluster Member T o replac e a f ail.
26-6 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Using Re covery Procedu res If this pro mpt does not app ear , enter enable , and press Return . Enter se tup , and press Re turn to start the set up pro gra m.
26-7 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Using Reco very Pr ocedures Basic management setup configures only enough connectivity for management of.
26-8 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Preventing Autone gotiati on M ismatche s Preventing Autone gotiation Mismatc hes The IEE E 802.
26-9 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Diagnosing Connectivit y Problems Executing Ping If you attem pt to pi ng a host in a d ifferent IP subne twork, you m ust define a st atic route to the network.
26-10 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Diagno sing Connec tivity Prob lems Using La yer 2 Tr ac erou te This section describes this informati.
26-11 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Using Debug C ommands • The trac erout e m a c i p c omma nd outp ut sh ows the La yer 2 p ath whe n th e specified so urc e a nd destinati on IP addr es ses b elon g to t he sa me sub ne t.
26-12 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Using D ebug Command s Enabling Debugging on a Specific Feature All deb ug comman ds are en tered in pr i vile ged EXEC mode, an d most deb ug co mman ds take no arguments.
26-13 Catalyst 2940 Switch Software Configuration Guide 78-15507-02 Chapter 26 Troublesho oti ng Usin g th e cr a shi n fo Fi le Note Be aware that the debuggin g destin ation yo u use affects system overhead. Lo gging messages to the console produces very high ov erhea d, where as logging me ssages to a vir tual termi nal produ ces less overhead.
26-14 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Chapter 26 Trouble shooting Using t he c rashinfo File.
A- 1 Catalyst 2940 Switch S oftware Configur ation Gui de 78-15507-02 APPEND IX A Supported MIBs This app endix lists the supporte d manage ment info rmation ba se (MIBs) for this rel ease.
A- 2 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Appendi x A Suppor ted MIBs MIB Li st • CISCO-SMI • CISCO-ST A CKMAKER-MIB • CISCO-STP-EXTENSIONS-MIB • CISCO-SYSLOG-MI B .
A-3 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Append ix A Supported M IBs Using FTP to Access the MIB Files Using FTP to Access the MIB Files Y ou ca n obt ai n ea ch MIB file by u sing th is pr oced ure : Step 1 Use FTP to acc ess the serv er ftp .
A- 4 Catalyst 2940 Swi tch Software Configu ration Guide 78-15507-02 Appendi x A Suppor ted MIBs Using FTP t o Acces s the MIB Fi le s.
IN-1 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 INDEX Numerics 802.1 D See STP 802.1 Q and trunk ports 9-2 config urati on limitat ions 13-13 nati ve VL AN fo r un tagge d tr affic 13-17 802.
Index IN-2 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 ARP table address resolution 6-26 managing 6-26 attribute s, RADIUS vendor-p ropri etary 7-29 vendor-s peci fic 7-28 aut hent .
Inde x IN-3 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 C cables , monit oring for uni direct ional links 18-1 candidate switch adding 5-16 automatic d iscovery 5-3 defined 5-3 HC .
Index IN-4 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 planning c onsid er atio ns automatic d iscovery 5-3 automatic r ecovery 5-8 CLI 5-21 host names 5-12 IP addresses 5-12 LRE pr.
Inde x IN-5 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 design co ncepts network pe rforman ce 1-7 network se rvices 1-7 large ca mpus 1-10 small to medium-size d network 1-8 confi.
Index IN-6 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 Devi ce Mana ger 3-13 See also Swi tch Manager DHCP-b ased autoc onfig urati on client re quest m essage ex change 4-4 config .
Inde x IN-7 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 PAgP aggreg ate-port lea rners 25-5 compatibilit y with Catalyst 1900 25-12 displaying sta tus 25-14 interactio n with other.
Index IN-8 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 HP OpenView 1-6 HSRP automatic cluster recovery 5-11 cluste r st andby g rou p c ons ider a tions 5-9 See also clu sters , cluster st andby group, an d standby comm an d sw it ch I ICMP ping exec uting 26-9 overvi ew 26-8 IDS, using with SPAN 20-2 IEEE 8 02.
Inde x IN-9 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 Intrusion De tection System See IDS inventor y, c lus ter 5-21 IP addresses candi dat e o r me mb er 5-3, 5-12 clust er acce.
Index IN- 10 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 lear ning 6-21 removi ng 6-23 static adding 6-25 char acte rist ics of 6-25 removi ng 6-25 MAC address mult icast entrie s, .
Inde x IN- 11 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 interoper ability and compat ibility among modes 11-9 loop gu ar d describe d 12-9 enab lin g 12-15 Port Fast describe d 1.
Index IN- 12 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 P PAgP See E ther Chann el pass-throug h mode 24-8 passwords default conf igur ati on 7-2 encr ypting 7-4 in clusters 5-12, .
Inde x IN- 13 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 ports acces s 9-2 dynami c access 13-3 priority 24-2 protec ted 17-4 secure 17-5 static-access 13- 3, 13-10 switch 9-1 tru.
Index IN- 14 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 queries , IGMP 16-3 R RADIUS attributes vendor-p ropri etary 7-29 vendor-s peci fic 7-28 config uring accoun ting 7-27 authe.
Inde x IN- 15 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 root gu ar d describe d 12-8 enab lin g 12-14 support fo r 1-3 root switch STP 11-12 RSPAN default conf igur ati on 20-5 d.
Index IN- 16 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 system contact and lo cation 23-13 trap m ana ger , conf ig uring 23-11 traps describe d 23-3, 23-4 differ ence s from infor.
Inde x IN- 17 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 BPDU filtering describe d 12-3 enab lin g 12-11 BPDU guard describe d 12-2 enab lin g 12-11 BPDU mes sage ex change 11-2 c.
Index IN- 18 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 summ er t ime 6-13 Sun Net Mana ger 1-6 switch cl usterin g tech nology See clu sters, switc h switch ed ports 9-1 Switch Ma.
Inde x IN- 19 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 TFTP config uration fi les in base dire ctory 4-5 config uri ng for au t oconf ig urat ion 4-5 limiti ng acc ess by server.
Index IN- 20 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 UplinkFast describe d 12-3 enab lin g 12-12 support fo r 1-3 user EXE C mode 2-2 usern ame-base d authentic ation 7-6 V version -depend ent transpa rent mode 14-4 virtual IP add re ss cluster st andby g roup 5-9, 5-20 comm an d sw it ch 5-9, 5-20 See also IP addresses vlan.
Inde x IN- 21 Catalyst 2940 Switch S oftware Configur ation Guide 78-15507-02 reconf irmation i nterval , changi ng 13-27 reconfi rmi ng m embe rship 13-27 retry co unt, changi ng 13-28 voice VL AN Ci.
Index IN- 22 Catalyst 2940 Switch Sof tware Configuration Guide 78-15507-02 WRR config uring 24-9 defining 24-3 descript ion 24-3 X XMOD EM pr otoc ol 26-2.
デバイスCisco Systems 2940の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Cisco Systems 2940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Cisco Systems 2940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。Cisco Systems 2940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。Cisco Systems 2940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。
Cisco Systems 2940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Cisco Systems 2940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、Cisco Systems 2940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Cisco Systems 2940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。
