Manuel d'utilisation / d'entretien du produit 3000 TX du fabricant 3Com
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® 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.
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.
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 Ob.
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 Spec.
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-.
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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 .
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.
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.
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.
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.
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.
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 .
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.
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 ).
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 .
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.
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.
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 .
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.
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.
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.
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 .
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 .
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.
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.
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 .
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 Intellige.
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.
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.
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.
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.
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 .
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.
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 .
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 .
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 .
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 .
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.
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 .
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 .
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 .
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 ).
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 .
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.
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 .
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.
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.
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.
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 .
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 .
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.
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 .
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.
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.
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 .
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.
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.
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.
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 .
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 .
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.
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.
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 .
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.
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.
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.
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 .
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 .
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 .
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.
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 .
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).
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.
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.
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.
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 .
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.
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 .
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.
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 .
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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).
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).
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.
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 F.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 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 D.
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.
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 as.
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 .
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.
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 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.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté 3Com 3000 TX c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du 3Com 3000 TX - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation 3Com 3000 TX, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le 3Com 3000 TX va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le 3Com 3000 TX, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du 3Com 3000 TX.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le 3Com 3000 TX. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei 3Com 3000 TX ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
