Manuale d’uso / di manutenzione del prodotto 3550 del fabbricante Cisco Systems
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iii Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 CONTENTS Preface vi i Audienc e vii Pur pose vii Conv enti ons vii Relat ed P ubl icatio ns xiii Obtain ing Documentati on xiv Cisco.
Cont ents iv Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 CHAPTER 2 Swit ch Ins talla tion 3-1 Prepar ing for Inst allati on 3-1 Warnings 3-1 Site R equ irem ents 3-4 Veri.
Content s v Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Cable an d Adapter Specifi cation s B- 3 Two T wiste d-Pair Cable Pinouts B-3 Four Tw isted- Pair Cable Pino uts fo.
Cont ents vi Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01.
vii Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Preface Audience This guide is for the netwo rking or computer tech nician responsible for installing the Catalyst 3550 multilayer switches. W e a ssume that you ar e familiar with the concepts and terminology of Etherne t and local a rea netw orking.
viii Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Conv entions Cautio n Means re a d e r b e c a re f u l . In this situation, you might do something that cou ld result in equipment dam age or loss of data. War ni n g IMPORT AN T SAFE TY INSTRUC TIONS This warning symbol means danger .
ix Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Pre face Convent ions War n un g WICH TIGE SI CHER HEITSH INWEI SE Dieses Warnsym bol bedeutet Gefahr . Sie befinden sich in einer Situation, die zu V erletzungen führen kann.
x Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Conv entions Va r n i n g ! VIKTIGA SÄ KERHETS ANVISN INGAR Denna varningssignal signalerar fara.
xi Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Pre face Convent ions Av is o INSTR UÇÕES IM PORT AN TES DE SEGURAN ÇA Este símbolo de aviso signi fica perigo. V ocê se encontra em uma situação em que há risco de lesões corporais.
xii Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Conv entions.
xiii Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Pre face Relate d Publicati ons Related Publications These do cuments p rovid e comple te informati o n about th e switch and ar e av ailable from this U R L: http://www .cisco.
xiv Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Obtain ing Do cument ation • Device manage r on line he lp (available on the s witch) • Getting Starte d with Cisco Network Assistant (not or derable but av a ilab le on Cisco.
xv Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Pre face Obtaining Technical Assistance Ordering Docume ntation Y ou can find ins tructio ns for orderi ng do cument atio n at thi s U RL: http://www .cisco.com/uni vercd/cc/t d /doc/es_inpck /pdi.
xvi Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Obtainin g Addi tional Pub lications and Informat ion Opening a T AC Cas e The onlin e T A C Ca se Open T ool ( http://www .cisco.com /tac/caseo pen ) is the fastest way to open P3 a nd P4 cases.
xvii Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Pre face Obtaining Additional Publications and Information • Pack et magazine is the Cisco quarterl y publication that .
xviii Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Preface Obtainin g Addi tional Pub lications and Informat ion.
C HAPTER 1-1 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 1 Product Overview The Cataly st 3550 f amily of m ultilayer switches—also ref erred to a s the switc hes—are st ackable Et.
1-2 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Feature s Figur e 1 -2 Catalyst 3550-24, 3 550-24-D C, 3550-FX , 3550-24P WR, and 3550 -48 Switc h Model.
1-3 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 1 Product Overv iew Features T able 1 -1 S witch Featu r es Featur e Descrip tion Hardwa re • 2 o r 10 G igabit Et herne t 10B.
1-4 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Front-Pa nel De scripti on Front-Panel Descript ion The swi tch front p anel incl udes the 10/100 or 10/100/ 1000 Ethe rnet por ts or 100BASE-FX ports, GBIC module slots, and switch LED s as shown in Figu re 1-3 and describe d on the following pages.
1-5 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 1 Product Overv iew Front -Panel Descr iption 10/100 an d 10/10 0/1000 Ports The Fast Ethern et (10 /100-Mb ps) and Gigabi t Etherne t (10/1 00/1000- Mbps) po rts use stan dard RJ-45 connec tors an d Et hern et pinou ts w ith in tern al cr ossovers.
1-6 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Front-Pa nel De scripti on GBIC Module Slots Y o u cannot configure speed or duplex mod e on GBIC slots,.
1-7 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 1 Product Overv iew Front -Panel Descr iption RPS LED The RPS LED sho ws the RPS status. Ta b l e 1 - 3 lists the LED c olors and their meanings. For more inform ation about the C isco RPS 300 or t he C isco RPS 675, see th e docum entat ion inc luded with the RPS.
1-8 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Front-Pa nel De scripti on SPEED Port spe ed The port oper ating speed: 10, 100, or 10 00 Mbps. LINE PWR 2 Port inlin e power The inline power status: on or off.
1-9 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 1 Product Overv iew Front -Panel Descr iption Bandwidth Ut ilization The UTIL mode on the switch shows the current bandwidth i n use b y the swit ch. (See Fi gure 1- 4 to Figure 1-8 .
1-10 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Rear-Panel Descr iption Figur e 1 -7 Bandwidth Ut ilization f or the Cataly st 3550-48 Figure 1-8 sh o ws the bandwidth utilizatio n percentages displayed by the LEDs on the Catalyst 3550-2 4-FX switch.
1-11 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 1 Product Overv iew Manageme nt Options AC Power Conn ector For A C-po wered switches, t h e internal power sup ply is an au toranging unit that supports input voltage s between 100 a nd 240 V A C.
1-12 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 1 P roduct Overv iew Managem ent Opt ions • Device manager Y o u can use the device m anager, which is in th e swi tch me mory , t o mana ge ind ividual and standa lone switc hes.
C HAPTER 2-1 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 2 Switch Instal lation This chapte r describes ho w to prepare for installat ion, how to install the switc h, and how to m ake connect ions to it.
2-2 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Prepar ing for Inst allat ion War ni n g Installation of t he equipment must comp l y with local and national electrical codes.
2-3 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Preparing for Installation War ni n g The Cataly st 3550-24-DC contains no field-replaceable units (FRUs). Do not open the chassis or attempt to remove or replace any compo nent s.
2-4 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Prepar ing for Inst allat ion Site Requirements When dete rmining wh ere to place the switch , be sure to ob serv e these re quiremen ts: • Operat ing en vironment is within the range s listed in Appe ndix A , “ T echnic al Specifica tions.
2-5 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Install ing the Switch – One cable gu ide and one black Phillip s machine scre w for attaching the cabl.
2-6 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Instal ling the Swi tch Attaching Brackets to the Catalyst 3550-12T and 3550-12G Switches The b racket orie ntatio n and th e bra ckets that you u se depe nd on w hether y ou are attac hing t he brac kets for a 19-in ch or a 24-i nch ra ck.
2-7 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Install ing the Switch Figur e 2-3 At taching Br ack ets for 1 9-Inch Racks, Rear P anel Forw ard Figur e.
2-8 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Instal ling the Swi tch Figur e 2-5 At taching Br ack ets for 1 9-Inch T elco Rac ks Figur e 2-6 At tac.
2-9 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Install ing the Switch Figur e 2-7 At taching Br ack e ts fo r 19-Inc h Racks, Fr ont P anel Forw ard Fig.
2-10 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Instal ling the Swi tch Figur e 2-9 At taching Br ack ets for 1 9-Inch Racks, Rear P anel Forw ard Fig.
2-11 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Install ing the Switch Figur e 2-1 1 At tachi ng Brack ets fo r 19-Inc h T elco Rac ks Figur e 2-12 At t.
2-12 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Instal ling the Swi tch Mounting the Switch in a Rack After the brack ets are attached to the switch , use the four supplie d number- 12 Phillips mach ine scre ws to secur e ly attac h the brac kets to the r ack, as sh ow n in Figure 2-13 .
2-13 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Install ing the Switch Attaching the Brackets to the Switch Figure 2-15 shows ho w to attach a 19-inch bracket to on e side of th e switch. Follo w th e same steps to attach the s econd bra cket to t he opposit e side.
2-14 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Instal ling the Swi tch Mounting the Switch on a Wall For the best support of the swit ch and cables, mak e su re that the switch is attached secur ely to wall studs or to a firmly atta ched plywood mo unting backboar d.
2-15 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Instal ling the Optiona l Ground Kit Installing the Opt ional Ground Kit For switches t hat req uire a two-h ole lug for gr oundi ng, you can order a kit co ntainin g the groun d lug a nd hardware from Cisco.
2-16 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Powerin g the Switch an d Connectin g Device s Step 6 Using a ra tcheting t orque screwdri ver , torq ue each gr ound-lug screw to 15 lbf-in. (240 ozf-in .
2-17 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Powering the Switch and Connecting Devices Connectin g a Cisc o RPS Use the cable supplied with the RPS to connect to the switc h rear panel. Connec t the switch and the RPS to the same AC po wer source.
2-18 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Powerin g the Switch an d Connectin g Device s The swi tch 10/100 an d 10/10 0/100 0 port default setting i s autonegotia te. If th e attac hed device does no t support au tonegotia tion, you can explicitl y set the sp eed and dupl ex paramete rs.
2-19 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 2 Switch Inst allation Powering the Switch and Connecting Devices Cautio n Do not remove the rubbe r plugs from t he fiber-optic po rts or t he ru bber ca ps from t he fiber-optic ca ble until you are read y to connect th e cable.
2-20 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 2 Switch Installation Powerin g the Switch an d Connectin g Device s.
C HAPTER 3-1 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 3 Troubleshooting This chapter descr ibes these troubleshootin g topics: • Understandi ng POST Results, page 3 -1 • Clearin.
3-2 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 3 Trouble shooting Diagno sing Proble ms The switc h LEDs b egin blinking afte r about 2 s econds. Note If the swit ch is not co nfigured, t he LEDs a re al l gree n. Y ou c an o mit Ste p 2 and run E xpre ss Setup to conf igure the switch.
3-3 Catalyst 3550 Switch Hardware Installation Guide OL-6155-01 Chapter 3 Troubleshoot ing Diagnosing Problems Ta b l e 3 - 1 describe s some commo n problem s and their sol utions. T able 3-1 Common Proble m s and Solutio ns Problem Solution System LED is not on, an d the switch does not run POST .
3-4 Catalyst 3550 Swi tch Hardware In stallation Guid e OL-6155-01 Chapter 3 Trouble shooting Diagno sing Proble ms No c onnec tivity • V e rify t hat the d evices at b oth en ds of the lin k ar e co nnec ted an d po wered. • V erify that the autone gotiation settings are the same at both ends.
A- 1 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 APPEND IX A Technical Specifications This app endix lists th e switch t echnical sp ecific ations in Ta b l e A - 1 to Ta b l e A - 5 .
A- 2 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Appendi x A Technical Speci fication s T able A -2 P o wer R equireme nts f or the Cat alyst 3550-1 2T , 3550-12G, 35 50-2.
A-3 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Append ix A Technical Spec ification s T able A -5 F iber -P ort Specification s for Ca t alyst 35 50-24-FX S witc hes Fiber -Port Power Levels Optic al transm itter wavelength 1300 nm 1 1.
A- 4 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Appendi x A Technical Speci fication s.
B-1 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 APPEND IX B Connector and Cable Specifications This appe ndix desc ribes the Ca talyst 355 0 switch port s and the ca bles and adapte rs that you use to connec t the switch to other devices.
B-2 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendi x B Connector a nd Cable Speci ficati ons Connecto r Specificati ons Figur e B-2 1 0 /1 00/1 00 0 Port Pin outs 100BASE-FX Ports The 100 BASE-FX port s use MT -RJ connecto rs, as sh own in Figu re B-3 .
B-3 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix B Connector and Cab le Specifi cations Cable and Adapter Speci ficati ons Cable and Adapter Specifications These sec tions descr ibe the ca bles and adap ters used with the C atalyst 3 550 switche s.
B-4 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendi x B Connector a nd Cable Speci ficati ons Cable and A dapter Spec ifications Figur e B-7 Four T wisted-P air Cr os.
B-5 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix B Connector and Cab le Specifi cations Cable and Adapter Speci ficati ons Rollove r Cable a nd Adap ter Pinouts This sec tion describ es ho w to iden tify a r ollov er ca ble (used to connect to the cons ole port) and also describe s the ada pter pinouts.
B-6 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendi x B Connector a nd Cable Speci ficati ons Cable and A dapter Spec ifications Ta b l e B - 3 li sts the pinout s fo r the console port , RJ-45- to-DB- 25 fe male D TE ada pter, and th e conso le dev i ce .
C-1 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 APPEND IX C DC Power Connections This a ppendix descri bes how to m ake DC p ower connec tions to the Catalyst 3550-2 4-DC switch. See the “ I nstalling the Switch ” sect ion o n page 2 -5 for instructions on installing the switch.
C-2 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix C DC Power Connections Connecting t o DC Power • 6-gauge co pper gr ound wire (insulat ed or nonins ulate d) .
C-3 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix C DC Power Connections Connecting to DC Power Step 4 Using a Panduit crimping t ool, crimp the ground l ug to the 6-gaug e wire, as shown in Figure C-2 .
C-4 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix C DC Power Connections Connecting t o DC Power Wiring the DC-Inp ut Power So urce War ni n g Only trained and qualif ied personnel should be allowed t o install, replace, or s ervice this equipme nt .
C-5 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix C DC Power Connections Connecting to DC Power Step 2 Identify t he positi ve and ne gati ve feed positi ons for the ter minal block connection. T he wiring sequenc e is positi ve to positi ve and ne gati ve to negati ve for both the A and the B feed wir es.
C-6 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix C DC Power Connections Connecting t o DC Power Figur e C-7 Inserting Wires in the T er minal Bloc k Plug Step 5 Use a r atche ting to rque screwdriver to torque the te rmin al bl ock cap tiv e screw (above th e inst alled w ire lead) to 4.
C-7 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix C DC Power Connections Connecting to DC Power Figur e C-9 Completed Wir ing of T er minal Bloc k Plug Step 7 Insert t he termin al bloc k plug in the te rmina l block hea der on the sw itch re ar panel , as shown in Figure C-10 .
C-8 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix C DC Power Connections Connecting t o DC Power.
D- 1 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 APPEND IX D Configuring the Switch with the CLI-Based Setup Program This ap pendi x provides a com mand-l ine in terface ( CLI)-b ased setup proced ure fo r a stan dal one switc h.
D- 2 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix D Configuring the Switch with the CLI-Based Setup Program Access ing the CLI Through the Console Port Note Whil e in Express Setup mode, the I P addr ess 10.0. 0.1 is activ e until you en ter the write memory comm and.
D-3 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix D Configuring t he Switch wi th the CLI-Ba sed Set up Progra m Accessi ng the CL I Throug h the Co nsole Port Fig.
D- 4 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix D Configuring the Switch with the CLI-Based Setup Program Enterin g the Initial Conf igurati on Informat ion Pow.
D-5 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix D Configuring t he Switch wi th the CLI-Ba sed Set up Progra m Entering the Initial Configuration Information Com.
D- 6 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix D Configuring the Switch with the CLI-Based Setup Program Enterin g the Initial Conf igurati on Informat ion Step 9 Ente r Y to conf igure the switch as the clu ster command s witch.
D-7 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 Append ix D Configuring t he Switch wi th the CLI-Ba sed Set up Progra m Entering the Initial Configuration Information After y ou comple te the setup program , the swit ch can run th e defa ult conf iguration that you creat ed.
D- 8 Catalyst 3550 Multilay e r Switch Hardware Insta llation Guide OL-6155-01 Appendix D Configuring the Switch with the CLI-Based Setup Program Enterin g the Initial Conf igurati on Informat ion.
IN-1 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 INDEX Numerics 10/100/10 00 ports cable l ength s 2-5 connec ting t o 3-17 describe d 2-5 pinouts B- 2 recomm ende d ca bl.
Index IN-2 Catalyst 3550 Multilayer Switch Hardware Installat ion Guide OL-6155-01 configuratio n by using the C LI D-4 comp leting the setup progra m D-5 starting the terminal em ulation softwar e D-.
Inde x IN-3 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 H HP OpenView 2-12 humidity, r elative A-1 I IE2100 2-12 inline pow er connec ting to Cisco Aironet a ccess p oint .
Index IN-4 Catalyst 3550 Multilayer Switch Hardware Installat ion Guide OL-6155-01 P packin g list 3-4 perform ance p roblem s, sol ving 4-2 pinouts 10/100/10 00 ports B-2 10/100 por ts B-1 console po.
Inde x IN-5 Catalyst 3550 Multilay er Switch Hardware Installati on Guide OL-6155-01 slots See ports SmartPort macr os 2-12 SNMP netwo rk manageme nt platf orms 2-12 soft ware mana gement o ption s 2-.
Index IN-6 Catalyst 3550 Multilayer Switch Hardware Installat ion Guide OL-6155-01.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Cisco Systems 3550 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Cisco Systems 3550 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cisco Systems 3550 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cisco Systems 3550 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cisco Systems 3550, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Cisco Systems 3550.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Cisco Systems 3550. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cisco Systems 3550 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
