3Com 3000 TX manual

® http://www.3com.com/ SuperStack ® II Sw itch 3000 TX 8 Por t User Guide Agen t Software Vers ion 3.1 Docum ent No. DU A1694-1 AAA04 Pub lish ed Ju ne 1 99 7[...]

3Com Corpor ation ■ 5 400 Bayfr ont Pl aza ■ San ta Cl ar a, Cal ifo r ni a ■ 95052- 8145 Copyright © 3C om Ir e la nd , 19 97 . All rights reserved. No part of this doc umen tat ion m ay b e reprod uce d in a ny fo rm or by a ny mea ns or us ed to make an y derivative w ork (such as translation, tr ansformatio n, or ada pta tion) w ithou t [...]

C ONTE NTS A BO UT T HIS G UI DE Int roduc tion 1 How to Use This Gu ide 1 Convent ions 2 Rela ted Doc umentat ion 2 1 G ETTI NG S TA RTED Abou t the Swit ch 300 0 TX 1-1 Sum m ary o f Fea tu res 1- 1 Port Co nnecti ons 1-2 100BASE -TX Ports 1-2 Plug - i n Module 1 -2 Swit ch Operat ion an d F eatures 1-2 Inte llig ent Flow Ma nag eme nt 1- 2 Ful l[...]

3 S ETTI NG U P FOR M ANAG EM ENT Methods of Managing the Sw itch 300 0 TX 3-1 Usin g the VT1 00 Man agement Inter face 3- 1 Usin g T elnet 3 - 2 Mana ging Over The Network 3- 2 IP Addr e sses 3- 2 Obtai ning a Regi stere d IP Addr ess 3-3 Navi gating t he VT10 0 Scr eens 3-4 Scr e e n Conven tions 3-4 Keyboa rd Shortc uts 3-5 Corr ecting T ext Ent[...]

Sett ing Up VLANs on th e Swit ch 5-8 Assi gning a Port to a VLAN When Using Po rt VL AN Mode 5-9 Sp ecif ying tha t a Port is a VL T port 5- 9 Sett ing Up VLANs Usi ng AutoSel ect VLAN Mode 5-10 Speci fying Infor mation About the VL AN Server 5-10 Speci fying Auto Select VLAN M o de 5-11 Spanni ng T r ee Prot ocol 5-12 What is STP? 5- 12 How STP W[...]

C T RO U B LE - SHOOT ING LEDs C-1 Usi ng the VT10 0 Inte rfa ce C- 2 Usin g t he Sw itc h C-3 D P IN - OUTS Null Modem Cab l e D-1 PC -A T Seria l Cable D-1 Mode m Cable D-2 RJ45 Pi n Ass ignments D-2 E S WI TCH 30 00 T X T EC HNICA L S PECI FICA TIONS F T EC HNICAL S UP PORT Onli ne T echni ca l Servi ce s F-1 W orld Wide W eb Site F- 1 3Com Bull[...]

A BOUT T HIS G UI DE About This Gu ide pr ovides an overvi ew of t h is guide, desc ribes the gui de conventio ns, tells you where to look for specific information and lists other publications tha t may be useful. In tr oduc t ion This guide pr ovides the in formation you need to install and confi gure the S witch 3000 TX 8 Port (3C16941A) with v3.[...]

2 A BOUT T HIS G UIDE Conv ent ion s Ta b l e 1 and Ta b l e 2 list conventions that a re used throughout this gui de. Rel ate d Doc ume ntat ion The Switch 3000 TX docum e nt set includes: ■ SuperStack I I Switch 3000 TX 8 Port Quick Reference Guide . Docum e n t N umber DQA1694-1AA A 0x ■ SuperStack I I Switch 3000 TX 8 Port Qui ck Installa t[...]

1 G ETTIN G S TAR TE D Ab out the Swi t c h 3000 TX Switching is currently a leading option for incr easing performanc e by pr oviding h igh spe ed backbone li nks and eliminating s er ver b ottlenecks. Part of the 3Com SuperStack ® II ra nge of products, the Swit ch 3000 TX prov ides simple, low cost and high perfor- mance sw itched co nnections [...]

1- 2 C HAPTER 1: G ETTI NG S TARTED Por t Conn ect ions 100BASE-TX Ports The Swi tch has eight Fast Eth ernet 10 0B ASE-TX ports configured as M D IX (cross-over) , which provide a 100Mb ps connec tion to other F ast Ether net devi ces such as the SuperS tack I I Swi tch 1000. Th e maximum segment leng th is 100m (328 f t) o ver cat- egory 5 twiste[...]

About t he Swit ch 3000 TX 1- 3 Virtua l LANs (VLANs ) The Switc h 3000 T X ha s a V irtual LAN ( VLAN) fea- ture w hich allows you to build your network seg- ments wi thout being restricte d by physical connections. A VLAN is defi ned as a group of loca- tion- and topol ogy-independent dev ices that com - munic ate as i f t hey ar e on the same ph[...]

1- 4 C HAPTER 1: G ETTI NG S TARTED Net wor k Con figur ation Examples The following two ill ustrat ions show som e exam- ples of how the S witch 3000 TX can be us ed on your network. F igu r e 1-1 The Swit ch 3000 TX us ed as a da ta-c ent er switch Examples of how the Switch 3000 TX can be use d in a VLAN-based n etwork are given i n Chapter 5 .[...]

Netw ork Co nf i gur atio n Ex amples 1- 5 Fig ure 1 -2 Incr easing po rt den sity with th e Swit ch 3000 TX[...]

1- 6 C HAPTER 1: G ETTI NG S TARTED Unit Overvie w — F ront F igu r e 1-3 Switch 3000 TX front vi ew[...]

Unit Overvi ew — Front 1- 7 100BA SE-TX P orts The Switc h 3000 T X ha s eight Fast Ether net 100BASE- T X R J 4 5 ports configured a s MD IX (cross-over), whic h pr o vide con nection to o t her Fast Et hernet devices such as the SuperStac k II Switch 1000. The maximum segm ent length is 100m (3 28ft) over category 5 UTP or S TP cable. As these [...]

1- 8 C HAPTER 1: G ETTI NG S TARTED Unit Ove rview — Rear F igu r e 1-4 Switch 3000 TX rear vie w[...]

Unit Ove rview — Re ar 1-9 Pow er Socket The Switc h 3000 T X a utomatically ad justs to the supply vol tage. The fuse is suitable for bo t h 110 V A.C. and 2 20–240V A .C. operation. For informa- tion on replacing fuses, refer to A ppendix A . Unit Seri al Num ber Y ou may need thi s serial number for fault r eporting purposes. Red undant Po w[...]

1-10 C HAPTER 1: G ETTING S TARTED Unit Defaults The following table shows the fact ory d e faults for the Switch 3 000 TX fea tur es. Manag ing the Swit ch 3000 TX The menu-dri ven interf ace built into the Switch 3000 T X is know n as the VT100 interface. Y ou can access it using a VT100 te rminal, or a PC usin g ter- minal emulation software. Y [...]

Quick St art For SNMP Use rs 1-11 Quic k Start For SNMP Us ers This se c tion de scribes how to get s tarted if you want to use an SNMP N et work Manager to ma na ge th e Swi tc h. It as su m es y o u are al re ad y familiar with S NMP ma nagement. ■ If you a re usin g IP and y ou have a BOOTP se rver set up c orrectly on your network, the I P ad[...]

1-12 C HAPTER 1: G ETTING S TARTED[...]

2 I N S T A L L A T I O N A N D S E T U P Follow in g Safety Info rmation Before installing or removing any components fr om the Switch o r carrying out a ny maintenance pr oce- dures, you mus t read the saf ety in f o r m ation pro- v i de d in Appendix A of this guide. P ositi oni ng t he Sw it c h 3 000 TX The Swi tch is suited for use in the of[...]

2- 2 C HAPTER 2: I NST ALLATION AND S ETUP Conf igu rat ion Ru les for Fa st Et her ne t The topology rules for 100Mbps Fast Ether net are slightly dif ferent to those for 10Mbps Ether net. Fig ure 2-1 illustra t es the key topology rules and pro- vi des examples of how th e y allow for large-s cale Fast Ethernet ne tworks. The key topol ogy rules [...]

C onfigur atio n Rules w it h Full Duplex 2-3 Fig ure 2 -1 Fast Et hernet config uration rules[...]

2- 4 C HAPTER 2: I NST ALLATION AND S ETUP Ins talling the Switch 3000 TX Rac k M ounti n g The Switc h is 1.5U h igh and fits in mo st standard 19 -i nch rack s. CAUTI ON: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the und erside of t he unit, if fitted. 1 Place the unit the right way up on a har d [...]

Inst alling the Sw itch 3000 TX 2-5 W all Mounti n g A single Switch can be wall-mo unted. CAUTI ON: D isconnect any c ables fr om the unit before continuing. Remove self-adhe sive pads from the underside of the unit i f they have been previously fitte d. 1 Plac e the Swi tch the righ t way up on a har d fl at sur- face, wi th the front fac ing tow[...]

2- 6 C HAPTER 2: I NST ALLATION AND S ETUP P ow erin g-Up th e Swi tch 1 Connect the power cord to the IEC s ocket on the rear of th e Sw it ch , an d to you r m ai ns s ock et . The Switc h has no ON/OFF swi tch; the only method of connecti ng or disconne cting main s power is through the power cord. 2 The Swi tch enters a Power On Self T est (POS[...]

Connecti ng Equ ipme nt to the Conso l e Por t 2- 7 Conn ec tin g Equi pme nt to th e Cons ole Po rt The Switch console port sett i ngs are set to: ■ 8 data b its ■ no parity ■ 1 stop bi t The terminal c onnected to the console po r t on the Switch m ust be co nfigur e d with the same se ttings. This procedure is de scribed in the documentati[...]

2- 8 C HAPTER 2: I NST ALLATION AND S ETUP Conne ctin g a Wor kst ati on Running SLI P Y ou can communicate w ith the Switch via the con- sole port from a workstation running S L IP (Serial Line Intern e t Protocol). In this w a y , you can perform out-of-band managem e nt using T el net or SN MP . Cables required for this connection depend o n the[...]

3 S ETTI NG U P FOR M ANAGEM EN T Met hods of Man agi ng t he Swit ch 3 000 TX Y ou can ma nage the Sw itc h in four ways: ■ Using the VT100 interface by c onnecting a VT1 00 terminal (or wo r kstatio n wi th term inal emulation softwar e) to t he Switch console port. ■ Using the VT100 interface over a TCP/IP ne twork using a w orkstation run n[...]

3- 2 C HAPTER 3: S ETTING U P FO R M ANAGEMENT Usin g T e lnet Any T e lnet faci li ty that emulates a VT100 te rminal should be able to c omm unicate with the Switch over a TCP/I P network. Up to three a c ti ve T elnet ses- sions c a n access t he Switch conc urr ently . If a con- nect ion t o a T e lnet s e s sion is lost in adv e rte ntly , the[...]

Managing Ove r The Network 3-3 If your n e twork is internal to your organiza tion only , you m ay use a ny arbitrary IP addre ss. W e sug- gest you use addresses in the series 191.100.X.Y , where X and Y a r e numbers between 1 and 254. Use 191.101. X.Y for the SLIP ad dr ess. If your n e twork ha s a co nnection to the external IP net work, you w[...]

3- 4 C HAPTER 3: S ETTING U P FO R M ANAGEMENT Nav igat ing th e VT100 Sc ree ns Screen Con ventio ns T o dif ferentiate types of informatio n, the V T10 0 scre ens use the following conventions: Ty p e o f informati on Show n on sc reen as... Descr ip tion Choice Field ♦ text ♦ T e xt enclose d with marker s is a list fr om which you ca n sele[...]

Navi gating t he VT100 Scre ens 3-5 Ke yboa rd Shor tc uts Ther e ar e several special characters o r combinations of character s that allow you to make shortcuts: [T ab] allow s y ou to move from one field to the next, on any s cr een without m aking any changes. [Return] mov e s y ou to the n e xt field on a form after you have made changes to th[...]

3- 6 C HAPTER 3: S ETTING U P FO R M ANAGEMENT Set ting u p th e S wit ch fo r Man ageme nt The following section s describe how to get started if you want to use an SNMP N etwork Manager to ma na ge th e Swi tc h. It as su m es y o u are al re ad y familiar wi th SNMP m anagement. If not, we rec om- mend the following p ublication: “The Si mple [...]

Sett i n g up the Switch for Management 3- 7 ■ If you have been assign e d a user na me and p ass- wo rd , en te r th o se d et a ils . ■ If you are logging on for the first time ( after insta llatio n or initia liza tion ), use a d efau lt u ser name and password to match your access requir e ments. The defaults ar e shown in Ta b l e 3 - 1 . [...]

3- 8 C HAPTER 3: S ETTING U P FO R M ANAGEMENT After Lo gging On When you have successfully logged on to the Switch, the Main M enu scre en is dis played as shown in Figure 3-3 . From he r e , you can select the options needed to m anage t he unit. Refer to the scr een map on page 4-1 . If you hav e installed an A TM OC-3c Mo dule into the Swit ch,[...]

Sett i n g up the Switch for Management 3- 9 Swi tch Managem e n t Setu p The Managem ent Setup screen all ows you to con- figur e IP , IPX, and SLIP parameters for the Sw itc h. This sc reen also all ows you to dis play sc r eens fo r setting u p the cons ole port and tra ps. T o a ccess the Setup sc reen, fr om t he Swi tch Mai n Menu scr een, se[...]

3-10 C HAPTER 3: S ETTI NG U P FO R M ANAG EMENT If you suspect that there is a prob lem with the Switch th at has not been detected by the Normal test s, set this field to Extended and reset the Swit ch (r efer to “ Resetting the Switch 3 000 TX ” on pa ge 4-26 ). If you set the Switch to perform an Extended test, the Switch m ust be disconnec[...]

Sett i n g up the Switch for Management 3- 11 CONSOLE PORT Sel ect this button to di spl ay the setup screen for console port parameters. Console port setup is described in “ Setting up the Console Port ” on page 4-24 .[...]

3-12 C HAPTER 3: S ETTI NG U P FO R M ANAG EMENT Loggi ng Of f If you have finished using the V T100 mana gement interfa ce, select the LOGOFF option from t he bottom of the main m enu. If you accesse d the VT100 management i nterfac e using a T el net sessi on or modem connecti on, the connection i s closed automatically . Aut o Logout There is a [...]

4 M A N A G I N G T H E S W I T C H 3000 T X F igur e 4-1 Scr ee n map Chapters 4 and 5 describe all m anagem ent facilities for the Switc h. While follo wing steps in these chap - ters, you m ay find the screen map below useful: If an A TM OC-3c Module is i nstalled in the Switch, extra s creens a re a vailabl e. Refer to the “SuperStack ® II S[...]

4- 2 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX S ett ing Up Us er s Fr om the Mai n Menu , s elec t USER AC CESS LEVEL S. The User Access L ev els scr een is displa yed as s hown in Figure 4-2 . Fr om this scr een you can access: ■ LOCAL SECU RITY s creen — This allow s you to set up access levels for users on t he Switch. ■ CREA T E USER [...]

Creati ng a New User 4- 3 Cr ea ting a New User These steps ass ume the User A cces s L evels s cr een is displayed. 1 Sele c t the CREA TE USER o pti on. The Cr eate User screen is di splayed, as shown in Figure 4-3 . 2 Fi ll in the fields and ass ign an access level f or the new user . 3 When the form is c omplete, s elect OK. The Cr eat e User s[...]

4- 4 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Deleting a User These steps ass ume the User A cces s L evels s cr een is displayed. 1 Sele ct the DELETE USERS option . The Delete Users screen is di splayed as show n in F igure 4 -4 . 2 Use the spacebar to highlig ht the user that you want to delete. Note that yo u cannot delete default users o r[...]

Editing Use r Deta ils 4-5 Editing User De t ail s These steps ass ume the User A cces s L evels s cr een is displayed. 1 Sele c t the EDI T USER opt ion. The Edi t User scr een is displayed, as shown in Figure 4-5 . 2 Fill in the fields as requi r e d. 3 Whe n you h ave co mple ted t h e chang es , select OK. The Edit U s e r sc r een sho ws th e [...]

4- 6 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Assigning Local Security The Local Security scr een shows a matrix of opti ons for access method (Con sole Port, Rem ote T eln e t, Communi ty-SNMP) and acce ss level. These steps ass ume the User A cces s L evels s cr een is displayed. 1 Sele c t the LOCAL S ECURITY option. The Local Secu- rity sc [...]

C hoosing a Switc h Management Level 4- 7 Cho osin g a Switch M ana gemen t Level The Swi tch Management s creen allows you to: ■ Choose b etween m a naging a port, the u nit, or a VLAN ■ Display screens for setting up the Switch ■ Displ ay a scr een for managing the Switch Data- base ■ Displa y sc r ee ns for mana ging resilien t link s ?[...]

4- 8 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX STP Use this button to di splay scr eens for ma naging Spanni ng T ree Pr otocol ( STP) informa tion for the level of ma nagement you have chose n (port or VLAN). Refe r to “ Spanning T ree Pr otoc o l” on page 5-12 . STP is not supported ov er Asynchrono us T r ansfer Mode (A TM) . Conseque ntl[...]

Sett ing Up t he Switch Unit 4- 9 Setting Up the Switch Unit With the Sw itch Management scr een displayed, cho ose the ma nage men t level Unit , then se lect th e SETUP b utto n. The Unit Setup scre en is displayed as shown in Figure 4-10 . Th e sc re en s ho w s th e fo llo w ing fie ld s: Unit Name Thi s r e ad-only f ield s hows the ty pe of d[...]

4-10 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX V LA N C on fi g ura t io n Mode Port / AutoSel ec t Thi s field allows you to specify how ports on the Switch ar e place d in VLAN s: ■ Port — The ports use P o r t VLAN Mode, which means that they are manuall y placed in the requir ed VLAN. Thi s is the d e fault m ode. ■ Au to Sel ect — T[...]

Setti ng Up the Switch Por ts 4-11 S ett ing Up th e Swi t ch P ort s With the Sw itch Management scr een displayed, choose the manage ment lev el Port . Choose the appr opriate port, then select the SETUP button. The Port Setup scr een i s displ ayed, as shown in Figure 4-11 . If the port is an A TM OC-3c Modul e port, the A TM Port Setup scree n [...]

4-12 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX IFM is not a v ailable on a port tha t h as ful l duplex enabl ed: ■ If the Duplex Mode fiel d i n this scre en is set to Full Duplex, the Intelligent Flow Ma nagement field is not displayed ■ In all o ther cases where the port has full duplex enabled, IFM has no effect Di sab le I n t er act iv[...]

Setti ng Up the Switch Por ts 4-13 ■ Un it De fa ult — Th e p o rt us es Po rt VL AN M o de o r AutoSelect V LAN Mod e depending on the c on- tents of t h e V LAN Configuration Mode f i eld in the Unit Setup scr e en. T his is the def ault setting. For m ore i nformation, r efer to “ Usi ng AutoSe lect VLAN Mode” on page 5-4 . Broad cast S [...]

4-14 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX ■ Broadc ast St o r m Control calculates t h e average broadcast ba ndwidth over the previous 20-second i nterval. T he average is ba sed on four samples taken at 5-second intervals. ■ When t h e av erage value ex c eeds t h e ris ing threshold value, the ri sing action is triggered. The acti on[...]

Sett ing Up the Swit ch Dat a ba s e (SDB) 4- 15 S ett ing U p the Swit ch Data base (S DB) The Swi tch maintai ns a database of device addr esses that i t receiv es on its ports . I t uses the i nformation in t his database to decide whethe r a frame should be forwarded or filte red. The database hol ds up to a maximum of 4080 entries; each e ntry[...]

4-16 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX The Datab ase V iew The Uni t Databas e View scr een, as shown in Figure 4-12 , allows y ou to view a nd configure the Switch Data b a se. T o access the Uni t Database view screen, displa y the Swi tch M a nagement screen, choose the man- agemen t lev el Un it , then se lect the SD B button. The U [...]

Sett ing Up the Swit ch Dat a ba s e (SDB) 4- 17 DELETE This button allows yo u to de lete entries from the database. Y ou cannot delete an entry associated with a port that uses AutoSe l e c t V L AN Mo de. Searching the Sw itch Datab ase Y ou ca n sea r ch t he sw it ch d ata bas e in two wa ys: by MAC address or port num ber . By M AC Add ress T[...]

4-18 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Setting Up Resilient Links Y o u c an c onfigu r e a Sw itch t o p r ov ide r esilie nt links to another device so tha t network disruption is mini- mize d if a link fa ils. A resilien t link pair c onsists of a main link and a standby link. Y o u define a resilient link pair by specifying t h e m a[...]

Sett ing Up Re silien t Li nks 4-19 Conf igur in g Resi lient Li nks With the Sw itch Management scr een displayed, choose the port to b e the main port in the resilient link pair , then s elect the RE S ILIENCE button. The Port Resilience screen is di spla y ed, as shown in Figure 4-14 . Th is scre en al lo w s yo u to s et u p , ed it and del ete[...]

4-20 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX ■ Both Failed — Although the resi li ent li nk i s cor- rectl y c onfigure d , both l inks have failed. This could be due to loose connectio ns or cabl e dam - age. ■ Un kn own — The network configura tion has changed and the resil ient link pair no longer con- forms to the rules . ■ No t [...]

Sett ing Up Re silien t Li nks 4-21 View ing the Re silient Links Setu p With the Sw itch Management scr een displayed, choose the manage ment lev el Uni t an d se lec t t he RESIL IENCE button. The Unit Resilie nce Sum mary screen i s di splay e d, as shown in Figure 4-15 . This sc r een sho ws t he cu r - rent r e silient link configu r ation for[...]

4-22 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Pair En able En ab le d / Dis ab l ed This field display s whet her this resilien t link pair is current ly enab led or disabled . Y ou ena ble or disab le a resi lient li nk pair using the P ort Resilience screen described in “ Con- figuring Resilient L inks” on page 4-19 . OK This bu t ton all[...]

Set t i ng Up T raps 4-23 Set ti ng U p T ra ps T raps a r e m essages sent ac ross the ne twork to an SNMP N e tw ork Manager . They alert t h e network administrator to faults or chang e s at the S witch device. Y our Network Manager may automa t ically set up tr aps in the Sw i tch T rap T able. Check the documen- tation accompa nying t he netwo[...]

4-24 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX S ett ing up the Co nsole Por t Fr om the Manage m ent Setup screen, described in Ch ap ter 3 , selec t the CONSOLE PORT button. The Consol e Port Setup scr een is displ ayed, as shown in Figure 4-17 . If you change any of the conso le port parameters, you terminate any existi n g se ssions using th[...]

Sett i ng up the C onsole Port 4- 25 Speed 1 200 / 2 400 / 4 80 0 / 9 600 / 1920 0 This field allows you to select the c orrect l ine sp eed (baud rate) for your terminal or modem. If you have enab led auto-configurati on, the line speed is set automatically . Cha r Size 8 Thi s read-o nly field disp lays the charac - ter bit (data bit) size for th[...]

4-26 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Res etting th e Switch 300 0 TX If you suspect a pro blem with the S witch 3000 TX, you can rese t it. 1 Fr om the Main Men u, selec t the RESET opt ion. The Rese t screen is di splayed, a s sh own in Figure 4-18 . 2 Sele ct OK. Rese tting t he Switc h in t his wa y is simi lar t o per- forming a po[...]

Init iali zing t he Swit ch 3000 TX 4-27 Init ializing the Swi tch 3000 TX This sc reen allows you to perform a reset as described in the previous sec t ion, and in a ddition, returns non-volatile data stored on t h e unit to its factory defaults (show n on page 1-10 ). Not e that the IP address is no t cle a red . Y ou sho uld only in itia l- iz e[...]

4-28 C HAPTER 4: M AN AGING T HE S W ITCH 3000 TX Up gr adin g Soft war e When 3Com issues a new v er s ion of the softwar e image for the Switch, you can obtain i t fr om 3Com’ s information delivery s ystems, de scribed in “ Online T ec hnical Services” on page F-1 . For upgrading A TM OC-3c Module software, refer to the “SuperStack II Sw[...]

5 A DV ANC ED M ANAGEM EN T Virtual LANs (VLANs) Setting up Virtual Local A r e a N et work s (VLANs) on the Switch 3000 TX provides you with less time-con- suming network admini stra tion and more effi cient network op eration. The following sections explain m or e about the con- cept of VL ANs and explain how they can be imple- mented on the Swit[...]

5- 2 C HAPTER 5: A DVANCED M ANAGEMENT How VLANs Ease Chan ge and Movement W i th traditional IP networks , network administra- tors spend muc h of their time dealing w i th move s and cha nges. If users mov e to a dif f er ent IP subne t , the IP a ddresses of each endstation must be updated m anually . W i th a VLAN setup, if an ends tati on in V[...]

Vir tual LANs (VLANs ) 5- 3 VLAN s and the Sw itch 3000 TX The Switc h 3000 T X su pports VLAN s which consist of a s et of s witch ports. E ach sw itc h port can only belong to o ne VLAN at a time, r e gar dless of the device to which it i s attached. Each Switch 3000 T X c an suppo r t up to 16 VLANs. However , yo u can have mo r e than 16 V L AN[...]

5- 4 C HAPTER 5: A DVANCED M ANAGEMENT Using Aut oSelect VLAN Mode By defa ult, all ports on the Switch use P ort VLAN Mode — where eac h switch port is ma nually plac ed in the r equir ed VLAN. T he Swi tch allows some ports to use another mode, AutoSelect VLAN Mode. In this m o de, the ports a re autom a tically placed in the r equired VLAN by [...]

Vir tual LANs (VLANs ) 5- 5 If you use AutoSelect VLAN Mode, note the foll ow- ing: ■ Y ou need to s pecify an IP add r ess and c ommunity string for the VLAN Serv er . ■ Y ou cannot us e VLAN 15. ■ If a port has bee n configured as a backbone port or as a VL T port, the port cannot use Auto S ele ct VLAN Mo de. ■ If a port has a perman e n[...]

5- 6 C HAPTER 5: A DVANCED M ANAGEMENT VL AN Co nf igur at ion Ex am pl e The exampl e shown in Figure 5-5 illustrates two VLANs spanning three S witch 1000 units a nd a basement Switch 300 0 TX uni t . Eac h Switch 1000 conne cts to the basement Switch using a VL T . The at tached r outer allows the two VLANs t o c om muni- cate with each other . [...]

Vir tual LANs (VLANs ) 5- 7 Fig ure 5 -5 VLAN conf igurati on with a S w itc h 3000 TX as a ba sement sw itch[...]

5- 8 C HAPTER 5: A DVANCED M ANAGEMENT Setting Up VL ANs on the Switch The VLAN Setup scr een allow s you to: ■ Assign ports t o VLANs, if tho se ports use Port VLAN Mode. ■ View VLAN s etup information for the Sw itc h. T o acc ess the VLAN Setup scr een: 1 From t he Main M enu , select S WITC H MAN AGE- MENT . The Switch Ma nagement sc reen i[...]

Vir tual LANs (VLANs ) 5- 9 Port ID 1 / 2 / 3 .. . 6 / 7 / 8 This field displ ays the ID of the port curr ently selected in the listbox. VLAN I D 1 / 2 / 3 . . .14 / 15 / 16 If the port speci- fied in the Port I D field uses Port V LAN Mode, this field allows you to ente r the ID of the VLAN to which t he port i s to be a ssigned. If the port uses [...]

5-10 C HAPTER 5: A DVANCED M ANAGEMENT Setti ng Up V LANs Us ing A utoSe lec t VLA N Mo de T o set up VLANs using AutoSe lect V LAN Mode , you need to: ■ Specify i nformation about the VLAN Server ■ Speci fy that the Switch unit, or individual ports on the unit, use AutoS elect VLAN Mo de Specifying Info rmatio n Ab out t he VLAN Server The VLA[...]

Vir tual LANs (VLANs ) 5-11 Specifying AutoS elect VLAN Mode T o speci fy that the Switch uses AutoSel ect VLAN M od e, re f er t o “Setting Up the S witch U ni t” on page 4-9 . T o specify that a port on the Switch uses AutoSe- lect V LAN Mode, r e fe r to “Setting Up the Switch Port s” on page 4 - 11 .[...]

5-12 C HAPTER 5: A DVANCED M ANAGEMENT Spann ing T r ee Pro t o col Using the Spanning T ree Pr otocol (STP) functional ity of your Switch makes your network more f ault toler- ant. The foll o win g sections expl ain more abo ut STP and the STP feature s supported by the S witch. STP is no t currently sup porte d ov e r an Asynchronous T ransfer Mo[...]

Spannin g T ree Pro tocol 5-13 F igur e 5-8 A net work that c reates lo ops F igur e 5-9 T raf fic flo wing t hroug h Brid ges C a nd A Fig ure 5 -10 T raff ic flowing thr ough Bri dge B[...]

5-14 C HAPTER 5: A DVANCED M ANAGEMENT How STP Works STP Initializ ation Initi ally , the STP system r equire s the following before it can c onfi gure the netwo rk: ■ Communi cation betwee n all the b r idges. This communic at ion i s carried out using Brid ge Proto- co l Data Units (B PDUs) , which are tr ansmitt ed i n packets with a known mul[...]

Spannin g T ree Pro tocol 5-15 An Example Figure 5-11 illustrate s part of a network. All bridges have a path cost va l ue ass igned to each port, identi- fied by PC =x xx ( where xxx is the value). Bridge A is selected by STP as the Root Bridge, because it has the lowest Brid ge Identifier . The Designated Bridge Port for L AN A is port 1 on Bri d[...]

5-16 C HAPTER 5: A DVANCED M ANAGEMENT STP C onfigurati ons Figure 5-12 shows two possible STP confi gurati ons using Supe rSta ck II Switch units: ■ Confi gura tion 1 — Re dundan cy fo r Ba ck- bone Link In t his configuration, a Desktop Switch and Switch 300 0 TX both have S TP enabled and are conne cted by two Fast Ethernet links. STP dis co[...]

Spannin g T ree Pro tocol 5-17 Enab ling STP on the Switch T o enable STP on y our Sw itch: 1 Fr om the VT100 Main Menu, se lect SWITCH MANAGEMENT . The Swit ch Management scr een is displayed. 2 In t he Manage m ent Level field, choos e Unit. 3 Choos e the SETUP butt on. The Unit Setup scre en is displayed as shown in Figure 5-13 . 4 In t h e Span[...]

5-18 C HAPTER 5: A DVANCED M ANAGEMENT Conf igurin g ST P on th e Swit ch CAUTION: Y o u should not configure any STP parameters unl ess you have consi der able knowl- edge and experi ence with STP . Configu ri ng th e STP Paramete rs of VLANs The Swit ch has a co mpletely separate STP system for each VL AN that yo u hav e specif ied. Each VL AN ha[...]

Spannin g T ree Pro tocol 5-19 Forward Delay 4 .. . 30 This r ea d-only field shows the time ( in second s) tha t the ports on the Swi t ch spend in the li stening and lea rning states. For mor e informat ion abo ut these st ates, r efer to “C onfigur- ing the STP Para meters of Ports ” on page 5-20 . Root P ort This read-only fi e ld sh ows th[...]

5-20 C HAPTER 5: A DVANCED M ANAGEMENT Configu ring the STP Pa ramete rs of Ports The Port STP scr een allows you to set up a nd manage the STP parameters of each port on the Switch. T o acces s the Port STP sc r een: 1 From t he Main M enu , select S WITC H MAN AGE- MENT . The Switch Ma nagement sc reen is di splayed. 2 In t he Manage m ent Level [...]

Spannin g T ree Pro tocol 5-21 Designated Root Thi s r ead-onl y field shows the Bridge Identifier o f the Roo t Bri dge. Designated Cost This read -only field shows the path cost from the Root Bridge to the Desi gnated Bridge Port for the c urr ent p ort ’ s segm ent. Desi gnat ed B ridge This r ead-only field shows the Bridge Identifier o f the[...]

5-22 C HAPTER 5: A DVANCED M ANAGEMENT RMON Using the RMON (Rem ote Moni t oring) c apabilities of your Switch allows network administrators to impr ove their ef ficiency and red uce the load on their network. The foll o win g sections expl ain more abo ut the RMON c oncept and the RMON fea tur es supported by th e Sw itch. Y ou ca n only use the R[...]

RMON 5-23 Both rising and falling thresholds are supported, and thresholds can be on the absolute value of a vari- able or its delta valu e . I n addition, alarm thresholds may be autocalibrated or set manua lly . Alar ms are used to inform yo u of a netw ork perfor- mance problem and they ca n trigger automated action r espon ses through the Event[...]

5-24 C HAPTER 5: A DVANCED M ANAGEMENT important oc curr enc es, you can depend on th e Event group fo r notification. Through the SNMP traps, e vents can trigger other actions providing a mechanism for an autom ate d response to certai n occurrences. Be nef its o f RMO N Using the RMON f eatures of your Switch has thre e mai n advantag es: ■ RMO[...]

RMON 5-25 RMO N Features of the Sw itch Ta b l e 5 - 2 details the RMON support provided by the Swi tch. Ta b l e 5 - 2 RMON su pport supp lied by the Sw itch RMON Grou p Suppo rt suppli ed by the Sw itch Stati st ics A new or initializ ed Switch has o n e S t atistics ses - sion pe r port/ VLAN. His tory A ne w or init ialized Switch has three His[...]

5-26 C HAPTER 5: A DVANCED M ANAGEMENT When usi ng the RM ON fea tures of the Swit ch, y ou should no te the foll owing: ■ After the default sessions are c re ated, they have no spe c ial sta tus. Y ou can delete or change them as r equi red. ■ The Switch 3 000 TX c an forward a ve ry large volume of packets per second. T he Statistics RMON gro[...]

RMON 5-27 About Defau lt Alarm Setting s A new or initialized S witch has fou r alarms defined for each port: ■ Bandwidth us ed ■ Broadcast bandwidth used ■ Per centage of pac kets forwar d e d ■ Errors per 10,000 p ackets The defaul t values and act ions for each of these alar m s ar e gi ven in Ta b l e 5 - 4 . Ab o ut the Au d it L og Th[...]

5-28 C HAPTER 5: A DVANCED M ANAGEMENT[...]

6 S TA TUS M ONIT ORING AND S TATI STI CS This c hapter describes how to v iew the current operating status of t he Switch, how to displ a y any error i nform ation in a fault log and how to carry out a r e mote poll to check the resp onse of another net- wo rk de vice . It also describes t h e Statisti cs scree ns for the Switch, and advises you o[...]

6- 2 C HAPTER 6: S TATUS M O NITOR ING AND S TATI STI CS Sum mary St atistic s With the Sw itch Management scr een displayed, choose the manage ment lev el Uni t , then sel ect t he ST A TISTICS button. The Summ a ry Statisti cs scr een i s displayed, as shown in Figure 6-1 . The Summary Stat istic s screen lists val ues for the curr ent coun t er [...]

Port St atisti cs 6- 3 Por t Statistic s With the Sw itch Management scr een displayed, choose the manage ment lev el port , t hen s elec t the ST A TISTICS butto n. The Port Statisti c s s c r een is dis - played as shown in Figur e 6-2 . As well as show ing statisti cs for t he port, the Port St atistic s scr een all ows you acce ss to tr af fic [...]

6- 4 C HAPTER 6: S TATUS M O NITOR ING AND S TATI STI CS Por t T raf fic Stati s ti cs With the Port Stati sti cs screen displayed, select the TRAFF IC ST A TIS TICS b utt o n. The Por t T raf fic Statis tics screen is di splayed, as shown in Figure 6-3 . The Port T raffi c Statistic s scr een shows the follow- ing: Port ID The ID of the port y ou [...]

Port T raffi c Statist i cs 6- 5 Frag ments The total number of packets r ec eived that wer e not an integral number of octets in length or that had a bad Fram e Chec k Sequenc e (FCS), and were less than 64 octets in length (excluding fram - ing bits, but including FCS octets). Frames Forwarded T he total numb e r of frames which wer e r e ceived [...]

6- 6 C HAPTER 6: S TATUS M O NITOR ING AND S TATI STI CS Port Erro r Ana lys is With the Port Stati sti cs screen displayed, select the ERROR ANAL YSIS button. The Port Error Analysis screen is di splayed as show n in F igure 6 -4 . The Port Err or Analysis scr een shows the follow ing: Port ID The ID of the port y ou a re c urrently manag- ing. CR[...]

Port Er ror An alysis 6- 7 Jabbers The total number of pac kets recei ved that were longer than 8K octets (excluding framing bits, but including FCS octets). CLEAR SC REEN COUNTER S Selec t this button to set all co unters sho wn on the scr e en to z ero. It is useful for tr end analysis if you wish to see change s in counters over a short period o[...]

6- 8 C HAPTER 6: S TATUS M O NITOR ING AND S TATI STI CS S tat us M onito ring The status scr een pro vides read-only i nformation about the S witch. This information may be useful for your technical supp ort r e pr esentative in the event of a pr o bl em. T o access the scr een, from the Main Menu, selec t the ST A TUS opti on. The Status scr een [...]

Fau lt Lo g 6- 9 Fault Lo g The Fault L og displays read-only information about the Swi tch which is updated whenever an abnor- mal co ndit ion is det ected . This infor mat ion is for internal 3C om use onl y . Y ou may be asked to quote this i nform ation if r eporting a fa ult to your supplier . With the Stat us s creen displ ayed, s elec t t h [...]

6-10 C HAPTER 6: S TATUS M ON ITOR ING AND S TATISTICS Rem ote Pollin g The Remote Poll scree n allows you to send a single fr ame to a r emote device to see if that device is responding. This can help to locate the s ource of a network problem. It is also partic ularl y helpful in locating dev ice s tha t support IP , IPX and ping but are not mana[...]

A S AFE TY I NFO RMATION Before carrying out any installation or remov a l of compon e nts, or a ny maintenance proc edures on the Switch, you must rea d the following safety information. Impo rtan t Safety Inf o r matio n WARNING: Warnings contain directions t hat you must follow for yo ur personal safety . Follow all instructions c arefully . Ple[...]

A-2 A PPENDIX A: S AFETY I NFORMATION ■ It is ess ential that the mains socket outl et i s installed near to t he unit and is a ccessible. Y o u can only disconnect the unit by r emov ing the appliance c oupler fr o m the unit. ■ If the power supply p lug is u nsuitable a nd you have to replace it , you may find other c o dings for the respecti[...]

Impor tant Sa fety In formati on A-3 Pow er Supp ly and Fus e The unit autom a ti cal ly adjusts to the su ppl y volt- age. Th e fuse is suita ble for both 1 10V A.C. and 220–240V A .C. operation. WARNING: Ensure that t he pow e r is disconnected before openin g the f use hol der cover . T o change the fuse, r elease the fuse holde r by gently le[...]

A-4 A PPENDIX A: S AFETY I NFORMATION L ’informat ion de Sécurit é Importante A V ERTISSEMENT : L es av er tisse m ents contiennent les directions que vou s devez suiv r e pour votre séc u- rité personnel le. Suivez toutes l es directives avec soin. V euillez lire à f ond l'informat ion de l a séc u r i té sui va- nte avan t d'in[...]

L ’inf or mation de Séc ur i té Impor tante A- 5 ■ Assurer que l'e ntr é e de la source d'alimentation soit débranchée avant d'ouvrir le couverc le de fusible du connecteur IEC ou d'e nlev er le couver- cle de l'uni té. ■ Seulem ent P our La Fran ce et L e Pérou: ■ Cette unité ne peut pas être mise en march[...]

A-6 A PPENDIX A: S AFETY I NFORMATION So c l e Po ur A lim ent ati on Mul ti pl e Branc her seul emen t une alimen tation multip le de 3Com à cet soc le. S uivre pour les détails les dir e c - tives de l 'i nst a llation dans le m a n uel qui accom pa- gne l'alim enta tion mu ltiple. Les Po rts RJ45 A V ERTISSEMENT : Ceux-ci sont les pr[...]

Wich tige Si cherhe i t sinf ormationen A-7 Wi chti ge Si che rhei tsi nfor mati onen WARNUNG: Warnunge n enthalten Anweisungen, die zur eig e nen Sicherheit unbedingt z u beachten sind. Bitte befolgen Sie alle Anweisu ngen sorgfältig und genau. Bitte unbed i ngt vor d em Einbaue n des Swi t c h Ein- heit d ie folgenden Sicher h e itsanwei sungen [...]

A-8 A PPENDIX A: S AFETY I NFORMATION St r omvers orgung und Si cher ung Das Gerät stell t sich automa ti sch auf die V ersor- gungsspa nnung ein. Die Sicherung ist sowohl für 110V A . C. w ie für 220–240V A.C. g e eigne t . WARNUNG: V or dem Ö ffnen der Siche rungshalter- ung da s Gerät vom Netzstrom trennen. Zum Auswec hseln der Sicherung [...]

B S CR EEN A CC ES S R IGH TS The foll owing table lists the rights assigned to each level of us er for accessin g and editing Switch scre ens vi a the VT100 interface. All access rights are r e ad-and-write unless other- wise sta ted. Sc reen A vailabl e to... Logon M o n itor Mana ger Secu rity Ma in Men u Mo n it or Mana ger Secu rity Swit ch M [...]

B-2 A PPENDIX B: S CREEN A CCESS R I GHTS VLAN STP Mon itor rea d-only Mana ger Secu rity VL AN Ser ver Mon itor read-on ly Mana ger Secu rity VLAN Set up Mon itor rea d-onl y Mana ger Secu rity User A ccess Leve ls Mon itor Mana ger Secu rity Local Security Secu rity Crea te U se r S ecurity De lete Users S ecurit y Edi t Us er Mon itor Mana ger S[...]

C T R O U B L E - S H O O T I N G The follo wing is a list of problems you m ay se e when managing the Switch with sugge sted courses of correc tive acti on to take. I f y ou have a pr ob lem which is not listed he r e and y ou cannot solve it, contact your lo c al technical s upport re presentative. LEDs Power L ED does not light: Check that the p[...]

C-2 A PPENDIX C: T RO UBL E - SHOOTING Usin g t h e VT100 Int erface Th e initi al Ma in Bann er scr een do es not di s- play: Check that your terminal or terminal emulator is corr ec tly configur ed to operate as a VT100 terminal. For cons ole port acce ss, you ma y need to press [Return] se veral ti mes befor e the Main Banner appears. Check the [...]

Using the Sw itch C-3 Check that the port through whic h y ou are trying to access the device is in VLAN 1 (the Default VLAN). Refer to “ Setting Up VLANs on t h e Switch” on pa ge 5-8 . T ry a ccess ing t h e dev ice through a dif ferent port. If you can now acc ess the de vice, a problem with the original port i s indicated. Re -examin e the [...]

C-4 A PPENDIX C: T RO UBL E - SHOOTING Y ou have adde d th e Switch 300 0 TX to an already bus y netwo rk, and res ponse ti mes an d traffic level s have i ncreased: Y ou may have adde d a group of users to one of the Switch 300 0 TX ports via a repeat e r or s witch, and not tur ned off Intelligent Flow M anagement ( IF M). T urn of f IFM on any p[...]

Using the Sw itch C-5 Y ou are tryin g to manage the Switch over a network which h as STP , and you are losing con- tact w i th th e mana gemen t agent int ermi ttently . As sh own in Figu re C -1 , there i s a SuperStack ® II Switch unit ( S witch A) between y our managem ent workstation and the S witch 3000 TX (Swi tch B). Y ou have config ur ed[...]

C-6 A PPENDIX C: T RO UBL E - SHOOTING[...]

D P IN - OU TS Nu ll Mo dem Cab le 9-pin to RS-232 25-pin PC-A T Serial Cable 9-pin to 9-pin[...]

D-2 A PPENDIX D: P IN - OUTS Mod em Cabl e 9-pin to RS-232 25-pin RJ45 Pi n Ass ign me nts[...]

E S WITCH 30 00 TX T ECHN I C AL S P ECIFICATIONS Phys i cal Dimensions Height: 76mm (3.0 in) x Wid th: 483m m (19. 0in ) x Depth: 300 m m (12.0in ) Weig ht: 4.4kg (9.7l bs) Envi r onmen tal Requir emen ts Operati ng T empera ture 0–50° C (32–1 22°F) Stor age T empe rature -10– 70 °C (14 –15 8°F) Operati ng Hum idity 10–95% r ela tive[...]

E-2 A PPENDIX E: S WITCH 3000 TX T ECHNI CAL S PECIFICATIONS Sta ndar ds Suppor ted SNMP SNMP pr otocol (RF C 1157 ) MIB-I I (RFC 1213) Brid ge MIB (R FC 1493) Repeat er MIB (RFC 1516) V LAN M IB (R FC 15 7 3) RMON MIB (RFC 127 1 and RFC 1757) T erminal Emu latio n T elnet (RFC 854) Prot oco ls U sed fo r A dmi nis tra tion UDP (RFC 7 68) I P (R FC[...]

F T ECHNI CAL S UP PORT 3Com provides easy access to t e chnical support information through a variety of ser v ices. This appendix describes th e se services. Information contained in t his appendix is c orrect at time of pu blicat ion. For the very l at est, w e r ecom- mend tha t you access 3Com Corporation’ s World W ide W e b site. Onlin e T[...]

F- 2 A PPENDIX F: T ECHNICAL S UPPORT Acc ess by D igital Mo dem ISDN use rs can d ial in to 3ComBBS us ing a digi t al modem for fast access up to 56 Kbps. T o access 3ComB BS using IS D N, use the foll owing nu mber: (1) 408 654 2703 3ComF acts A utomate d Fax Servic e 3Com Corporation’ s interactive fax service, 3ComFacts, p rov ides data s he[...]

Suppor t from Y our Ne twork Supplier F-3 S upp ort fr o m Y our Net work Supp lier If additional assistanc e is r equired, contact your network su pplier . M any s uppli ers ar e authorize d 3Com service partners who are qualified to pr ovide a variety of services, inc ludi ng ne twork planni ng, insta llatio n, hardware main tena nce, a pplica ti[...]

F- 4 A PPENDIX F: T ECHNICAL S UPPORT R et urnin g Pr o du cts fo r Re pair Before you sen d a product directly to 3Com for repai r , you must f i rst obtain a Return Materials Authorization (RMA) num ber . Products sent to 3Co m wi t h out RM A numbe rs w ill be r et urn ed to the sender unopened, at the se nder’ s expe nse. T o obtain an RMA nu[...]

G LOSSAR Y 10BASE-T The IEEE 80 2.3 specific ation for Ether net over Unsh ielded T wiste d P air ( UTP) c abling . 100BASE-FX 100Mbp s Ethern e t implementation ov er fiber . 100BASE-TX 100Mbp s Ethernet implementation ove r category 5 and T ype 1 T wis t e d Pair c a bling. ageing The automatic r emoval of dynami c en tries fr om the Switch Datab[...]

2 G LOSSARY broad cast sto rm Mult iple sim ultan eous broad cast s t h at typi cally absorb available network bandwidth and can cause network failure. cons ole port The port on the Switch accepting a terminal or modem connector . It changes the parallel arrange- ment of data w ithi n co mp uters to the ser ial form used on data transmiss ion li nk[...]

G LOSSARY 3 LAN Local Area Network. A network of connected c om- puting resources (suc h as P Cs, printers, se rvers) cov - ering a r e lati vely small geographic ar ea ( usually not larger than a floor or bui ldi ng). C haracterized by high data rates and low erro r rates. lat en cy The delay between the time a d evice r eceives a fr ame and the t[...]

4 G LOSSARY RMO N Remote Monitorin g. Subset of SNMP MIB II a llows monitoring and managem ent c apabi li ties by addressing up to ten different groups of i nforma- tion. RPS Redundant Power System. Part of the SuperStack II product range, provides a backup s ourc e of power when co nnected to the Switch. server farm A cluster of ser v ers in a cen[...]

G LOSSARY 5 TF TP T rivia l File T ransfer Pr o t ocol . Allows you to tran sfer files (s uch as software upgrades) fr om a r e mote device us ing your S witch unit’ s lo cal managem ent capabilities. T ran scend ® 3Com’ s umbrella man a geme nt system used to manage all of 3Com’ s networking solutions. UDP User Datagram protocol. An Inter n[...]

6 G LOSSARY[...]

I NDE X Numerics 100B ASE-TX port 1- 2, 1 -8 3Com Bu lleti n Boar d S ervic e (3 ComBBS ) F-1 3Com sal es of f ices F- 3 3C om U RL F-1 3C omF act s F- 2 3C omF oru m F- 2 A Acce ss Level field 4- 3 acces s rights B-1 Activ e Po rt field 4-20, 4 -21 agei ng en tries 4-15 agei ng tim e , specifyin g 4-10 ag en t so ft war e v ers io n n um ber 6-8 a[...]

2 I NDEX D Data Link Pr ot ocol fiel d 3-10 Datab ase Entries field 4-16 dat aba se. See Sw itch Dat abase DCD Con trol fiel d 4-2 4 def aul t pas sword s 3-7 r outer 3 -10 set tings 1- 10 users 3-7 Defau lt R MON Host/M atri x field 4-10 Defau lt R outer fie ld 3-10 Defau lt VLAN 5-3 Delet e U s ers scree n 4-4 Des ign at ed Br id ge f iel d 5 -2 [...]

I NDEX 3 Ser ver Addre ss 4-28 SLIP Ad dr ess 3-10 SLIP SubNe t Mask 3-10 Spanni ng T r ee 4-10 Speed 4-2 5 Standb y Links A vai lab le 4 -1 9 ST ANDBY Por t 4-21 Standb y Port ID 4-19 Stop Bi t 4- 25 STP Sta te 5-20 sys Name 4 -9 Sys tem Up T ime 6- 8 T arget Addr ess 6-10 Thr ottle 4-23, 5- 10 T im e Si nc e T opo lo gy Ch a nge 5- 19 T o pol ogy[...]

4 I NDEX def ault 3- 7 fo rg et ti ng 4 -5 new 4-3 Path Cost field 5-21 path cost s, defau lt 5 -14 perm ane nt entrie s 4-15 disp layi ng 4-1 6 speci fy ing 4-16, 4- 17 Perm anent fi eld 4-16 pi n assi gnme nts mo dem cab le D-2 nul l modem cab le D -1 RJ45 D -2 se ri al cab le D -1 Pl ug- in Modu le 1-2 slot 1- 9 Pl ug- in Modu le T ype field 4-1[...]

I NDEX 5 SLIP A ddress fi eld 3-10 SLI P Su b Net Mas k fi eld 3- 10 SNMP 1-10, 3-6 Commu nity 4-6 qui ck st art 1 -1 1 so ck et power 1-9 RPS 1- 9 Softw are Upgr ade scr een 4 -28 s oftwar e versio n numb er 6-8 Spann ing T ree field 4-10 Spann ing T r ee Pr ot ocol . Se e ST P s peci ficat ions, tec hnical E-1 Spe e d fiel d 4 - 25 s tandar ds su[...]

6 I NDEX V ver si on nu m ber boot so ftw a r e 6 -8 h ardw a re 6- 8 upgrad able soft war e 6-8 Virtua l LAN T runks. S ee VL T s Virtua l LANs. See VLANs VLAN Config urat ion Mod e field 4-10, 4- 12 VLA N ID fie ld 5-9 , 5-1 8 VLAN Membersh ip fi eld 5 -8 VLAN Server 5-4 VLAN Ser ver Com munity Stri ng f ield 5-10 VLAN Ser ver IP A ddres s fie ld[...]

3C om Cor po rat ion L IMI TED W ARRANTY H ARD WARE 3Com wa rra nts its har dw are pr oduc ts to b e free f rom defec ts in w orkm ans hip a nd mate ria ls, und er norm al u s e an d se rvice, for th e fol lowin g len gths of ti me f ro m t he dat e of purch ase from 3Com or its Authorized Resel ler: If a p r oduct does n ot operate as warranted ab[...]

E LECTRO -M AGNETIC C OMPATI BILITY S TA TE ME NTS FCC S TA TEMENT This equi pment ha s been tested and found t o comply w ith the l imits for a C lass A digital device, pur suant to pa rt 15 of th e FCC rules. These limi ts are des igned to pro vi de re asonab le prot ect ion agai nst ha rmfu l in ter fer enc e wh en the e qui pmen t is operat ed [...]