Manuale d’uso / di manutenzione del prodotto DUA1770-0AAA04 del fabbricante 3Com
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http://www.3com.com/ Part No. DUA1770-0AAA04 Published August 2002 SuperStack ® 3 Switch 4900 Series Getting Started Guide Switch 4900 (3C17700) Switch 4900 SX (3C17702) Switch 4924 (3C17701) Switch .
3Com Corporati on 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 2002, 3Com T echnologies. All rights re served. No part of this documentation may be repr oduced in any form or by.
C ONTENTS A BOUT T HIS G UIDE Conventions 8 Related Documentat ion 9 Accessing Online Documentation 9 Produ ct Registration 10 Documentation Comments 10 1 I NTRO DUCING THE S UPER S TACK 3 S WITCH 490.
Rules For Interconnecting Units 25 The Power -up Sequence 26 Powering-up the Swit ch 26 Checking for Correct Operation of LEDs 26 Connecting a Redu ndant Power Sy stem 27 Choosing t he Correct 10/100/.
4 P ROB L E M S OLVING Solving Pr oblems Indicated by LEDs 54 Solving Hardwar e Problems 55 Solving Communication Problems 57 Solving Software Upgrade Pr oblems 58 A S AFETY I NFORMATION Important S a.
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A BOUT T HIS G UIDE This guide provides all the information you need to install and use the following Switches in their default state: ■ SuperStack ® 3 Switch 4900 (3 C17700) ■ SuperStack ® 3 Sw.
8 A BOUT T HIS G UIDE Conventions Ta b l e 1 and Ta b l e 2 list conventions that are used throughout this guide. Ta b l e 1 Notice Icons Icon Notice Type Description Information note Information that describes important features or instructions.
Related Documentation 9 Related Documentation In addition to this guide, each Sw itch documentatio n set includes the following: ■ SuperStack 3 Management Quick Reference Guide This guide contains: ■ a list of software features supported by each Switch.
10 A BOUT T HIS G UIDE T o access th e online documentation from the CD-ROM: 1 Insert the CD-ROM into the relevant CD-ROM drive. If your PC has auto-run enabled, a splash scr e en will be displayed automatically . 2 Select the Documentation section from the contents page.
1 I NTR ODUCING THE S UPER S TACK 3 S WITCH 4900 S ERIES This chapter contain s introductory information about the Switch 4900, 4900 SX, 4924 and 4950 and how they can be used in your network. It covers summary information about the hardwar e. The information for all the Switches in the Switch 4900 Se ries is the same unless otherwise stated.
12 C HAPTER 1: I NTRODUCING THE S UPER S T ACK 3 S WITCH 4900 S ERIES About the Switches ■ The Switch 4900 connects your existing 100 Mb ps devices and high-performance workgroups with a 1000 Mbps copper backbone o r server connection.
About the Switches 13 Summary of Ha rd wa re Fe a tu re s Ta b l e 3 summarizes the hardware features that ar e suppo rted by the Switches. Ta b l e 3 Hard w are f ea tu re s Feature Switch 4900 Serie.
14 C HAPTER 1: I NTRODUCING THE S UPER S T ACK 3 S WITCH 4900 S ERIES Switch — Front View Detail Figure 1 Switch 4900 — fr ont view Figure 2 Switch 4900 SX — fr ont view.
Switch — Front View Detail 15 Figure 3 Switch 4924 — fr ont view Figure 4 Switch 4950 — fr ont view WAR N I NG : RJ-45 Ports. Thes e are shield ed RJ-45 data sockets. They cannot be used as standard traditional teleph one sockets, or to connect the unit to a traditional PBX or pu blic telephone networ k.
16 C HAPTER 1: I NTRODUCING THE S UPER S T ACK 3 S WITCH 4900 S ERIES 100/1000BASE-T and 10/100/1000BASE-T Ports The 100BASE-TX/1000BASE-T and 10 BASE-T/100BASE-TX/1000BASE-T ports have RJ-45 conne ctors and are configur ed as Auto MDIX (cross-over).
Switch — Front View Detail 17 LEDs Ta b l e 4 lists LEDs visible on the front of the Switch, and how to r ead their status according to color . For information on using the LEDs for problem solving, see “Checking for Co rrect Operation of LEDs” on page 26 .
18 C HAPTER 1: I NTRODUCING THE S UPER S T ACK 3 S WITCH 4900 S ERIES Switch — Rear View Detail Figure 5 Switch 4900 — r ear view Figure 6 Switch 4900 SX — r ea r view Layer 3 LED Green The Switch software supports L ayer 3. Off The Switch software does not support Layer 3.
Switch — Rear View Detail 19 Figure 7 Switch 4924 — r ear view Figure 8 Switch 4950 — r ear view Unit Information Label This label shows the following: ■ The 3Com product name of the Switch .
20 C HAPTER 1: I NTRODUCING THE S UPER S T ACK 3 S WITCH 4900 S ERIES Console Port The console port allows you to connect a terminal and perform remote or local out-of-band management. The con sole port uses a stand ard null modem cable and is set to aut o-bau d (up to a maximum of 19200 baud), 8 data bits, no parity and 1 stop bit.
2 I NSTALLING THE S WITCH This chapter contains the informat ion you need to install and set up the Switch. It covers the following topics: ■ Package Contents ■ Choosing a Suitable Site ■ Rack-m.
22 C HAPTER 2: I NSTALLING THE S WITCH Package Contents ■ Switch unit ■ CD-ROM ■ This Guide ■ Management Quick Reference Guide ■ Release No tes ■ W arranty Flyer ■ Power Cord ■ 2 x sec.
Rack-mounting 23 ■ The air is as free fr om dust as possible. ■ The unit is installed in a clean, air conditioned environment. ■ No more than four Switch units ar e placed on top of one another , if the units are fr ee-standing. ■ The Switch is situated away from sour ces of conductive (electrical) dust, for example laser printers.
24 C HAPTER 2: I NSTALLING THE S WITCH Figure 9 Fitting a bracket for rack-mounting Y ou must use the screws supplied wi th the securing brackets. Damage caused to the unit by using incorrect screws invalidates your warranty . 4 Repeat steps 2 and 3 for the other side of the Switch.
Creating an XRN Distributed Fabric 25 How T o Interconnect Units T o interconnect any two Switch 4900 Series or Switch 4050/4060 units you will need to order the XRN Interconnect Module Kit (3C17715). The kit consists of two XRN Interconnect Modules and an Inter co nnect Cable.
26 C HAPTER 2: I NSTALLING THE S WITCH existing unit. If you do not initializ e the unit, problems may be caused by conflicting Switch configurations. ■ When the Switch units are inter connected they are assigned a unit number dependent on which XRN Interconnect Cable end is connected to which Switch.
The Power-up Sequence 27 If there is evidence of a problem, see “Solving Problems Indicated by LEDs” on page 54 for a list of suggested solutions. Connecting a Redundant Power System Y ou can connect a Su perStack 3 Adva nced Redun dant Power System to the Switch.
28 C HAPTER 2: I NSTALLING THE S WITCH Ta b l e 7 Cables requir ed to connect the Switch to othe r devices if auto-negotiation is disabled CAUTION: If you want to install the Switch usin g a Category 5E or Category 6 cable, 3Com recomm ends that you briefly connect the cable to a grounded port before connectin g ne twork equipmen t.
Switch 4950 — GBIC Operation 29 Switch 4950 — GBIC Operation The following sections describes how to insert a GBIC transceiver into a GBIC port on a Switch 4950. GBIC transce ivers are hot -insertable an d hot-swappa ble. Y ou can remove them from and insert th en into any GBIC port without having to po wer down the Switch.
30 C HAPTER 2: I NSTALLING THE S WITCH ■ Fiber SC connector ■ T y pe 4 GBIC with intern al EEPROM fitted. If the GBIC transceiver is faulty , it will not operate within the Switch. See “Solving Hardwar e Problems” on page 55 . Do not use non-3Com GBICs.
Switch 4950 — GBIC Operation 31 3 The transceiver connects to the ne twork using a duplex SC connector . Attach a male dup lex SC connector on t he network cab le into the dup lex SC connector on the transceiver . 4 Connect the other end of the cable to a device fitted with an appropriate Gigabit Ether net connection.
32 C HAPTER 2: I NSTALLING THE S WITCH.
3 S ETTING U P FOR M ANAGEMENT Y our Switch can operate in its default state, that is, you can install it and it will work straight away (plug-and- play). However , to make full use of the features of fered by the Switch, and to change and monito r the way it works, you have to acce ss the management software that r esides on th e Switch.
34 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Setting Up Overview This section gives an overview of what you need to do to g et your Switch set up and rea dy for mana gement when it is in its def ault state. The whole setup process is summarised in Figur e 12 .
Setting Up Overview 35 users and changing default passwords, see “Def ault Users and Passwords” on page 51 . IP Configuration Y ou can use one of the following meth ods to allocate IP information to your Switch (essential if you wish to manage your Switch across the network).
36 C HAPTER 3: S ETTING U P FOR M ANAGEMENT temporary as they cannot be routed but ar e useful for small networks which are not connected to other netw orks, or for initial configuration. However , as soon as a DHCP or BootP se rver is detected, the Switch will configure itself with the IP address allocated by that server .
Manually Configuring IP Informatio n 37 Manually Configuring IP Information Y ou can manually configure the Switch IP information in the following ways: ■ Connecting to a front panel port — Connect a works tation using an Ether net cable to a front panel port of the Switch.
38 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Connecting the W orkstat ion to the Switch 1 Connect the workstation to a front panel port using an Ethernet cable as shown in Figure 13 .
Manually Configuring IP Informatio n 39 If there is no response, wait for one minute then re-enter the default IP address. 3 At the login and password pr o mpts, enter admin as your user name and press Return at the p assword pr ompt (default user n ame and password).
40 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Figure 14 Example top-level command line interface menu 4 At the Select menu option prompt you can either: ■ enter the protocol ip basicConfig command. At the Enter configuration method prompt enter manual .
Manually Configuring IP Informatio n 41 ■ Documentation supplied with th e terminal emulation softwar e. ■ A suitable cable: ■ A standard null modem cable — if you ar e connecting directly to the console port, or ■ A standard modem cable — if y ou are connecting to the console port using a modem.
42 C HAPTER 3: S ETTING U P FOR M ANAGEMENT ■ no parity ■ 1 stop bit ■ no h ard w a re f l o w c o n tro l Refer to th e documenta tion that ac companies the terminal emulation software for mor e information.
Viewing Automaticall y Configured IP Informatio n 43 4 Enter the IP address, subnet mask, a nd gateway IP addr ess for the Switch. The screen displays a summary of the information entered.
44 C HAPTER 3: S ETTING U P FOR M ANAGEMENT If your network does not have a DHCP or BootP server , the workstation running 3Com Network Supervisor must be on the same subnet as the Switch, because Auto-IP addresses are non-routable.
Viewing Automaticall y Configured IP Informatio n 45 b T ighten the r etaining screws on the cable to pr event it from being loosened. c Connect the other end of the cable to one of the serial ports (also known as a COM port ) on your workstat ion.
46 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Figure 18 Example top-level command line interface menu 4 At the Select menu opt ion pr ompt enter the protocol ip interface summary command. At the Select IP interfaces pr ompt ente r all . A summary of the automatically allocated IP information is displayed.
Methods of Managing a Switch 47 Figure 19 CLI management via the console port Figure 20 CLI management over the network Refer to “Setting Up Command Line Interface Management” on page 48 .
48 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Figure 22 SNMP management over the network Refer to “Setting Up SNMP Management” on p age 51 . Setting Up Command Line Interface Management This section describes how you can set up command line interface management using a local console po rt connection or over the network.
Setting Up Web Interface Management 49 >telnet xxx.xxx.xxx.xxx (where xxx. xxx.xxx.xxx is the IP addr ess of the Switch) If opening a T elnet session via third party software you w ill need to enter the IP address in the format suitable for that software.
50 C HAPTER 3: S ETTING U P FOR M ANAGEMENT For the browser to operate the web in terface corr ectly , JavaScript and Cascading Style Sheets must be enabled on your browser . These featu res are enabled on a browser by default. Y ou will only need to enable them if you have changed your browser settings.
Setting Up SNMP Management 51 Setting Up SNMP Management Any network management application running the Simple Network Management Protocol (SNMP) can manage a Switch if: ■ The correct Management Information Bases (MIBs) are installed on the management workstation.
52 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Ta b l e 9 Default Users Use the admin default user name (no password) to login and carr y out initial Switch setup.
4 P RO B L E M S OLVING This chapter helps you to diagnose an d solve problems you may have with the operation of your Switch. There is also an explanation of IP addressing.
54 C HAPTER 4: P ROBLEM S OLV ING Solving Problems Indicated by LEDs If the LEDs on the Switch indicate a problem, r efer to the list of su ggested solutions below . The Power LED does not light Check that the power cable is firmly connected to the Switch and to the supply outlet.
Solving Hardware Problems 55 So l v in g H a rd w are Problems In the rar e event of your Switch unit experiencing a hardware failure, refer to the list of suggested solutions below .
56 C HAPTER 4: P ROBLEM S OLV ING If a fan failure warning message is generated: 1 Power of f the unit. 2 Check that the air vents are not obstructed. 3 Power cycle the unit. T o do this, remove and r econnect the AC mains supply . If the unit has no AC main supply , remove and re connect the DC RPS supply .
Solving Communication Problems 57 Solving Communication Problems If you experience communication problems with the Switch, ensur e that: ■ The Switch IP address has been configured.
58 C HAPTER 4: P ROBLEM S OLV ING How do you obtain a r egistered IP Address? The IP registration system ensures that every IP addr ess used is unique; if you do not have a registered IP addr ess, you may be using an identical address to someone else and your network will not operate correctly .
A S AFETY I NFORMATION Y ou must read the following safety information before carrying out any installation or removal of components, or any maintenance pr ocedures on the Switch 4900, 4900 SX, 4924, or 4950. WAR NI N G : Warnings contain directions that you mu st follow for your personal safety .
60 A PPENDIX A: S AFETY I NFORMATION Important Safety Information WAR NI N G : Installation and removal of the unit must be carried out by qualified personnel only . WAR NI N G : If installing the Switch in a stack with SuperStack 3 units that are narrower than the Switch, the Sw itch unit must be installed below the narrower units.
Important Safety Information 61 WAR NI N G : The socket out let must be near to the unit and easily accessible. Y ou can only remove power fro m the unit by disconnecting the power cord from the outlet. WAR NI N G : This unit operates under SEL V (Safety Extra Low V oltage) conditions according to IEC 60950.
62 A PPENDIX A: S AFETY I NFORMATION WAR NI N G : Fiber Optic ports - Optical Safety Never look at the transmit laser wh ile it is powered-up. Never look directly at the fiber ports and fiber cable ends when they are powered-up.
L’information de Sécurité Importante 63 L ’information de Sécurité Importante A VERTISSEMENT : L'in stallation et la dépose de ce groupe doivent être confiés à un personnel qualifié.
64 A PPENDIX A: S AFETY I NFORMATION A VERTISSEMENT : La pr ise secteur doit se trouver à proximité de l’appareil et son accès doit être facile. V ous ne pouvez mettre l’appareil hors circuit qu'en débranchant son cor don él ectrique au niveau de cette prise.
L’information de Sécurité Importante 65 A VERTISSEMENT : Ports pour fibres optiq ues – sécurité sur le plan optique Ne regardez jamais le la ser tant qu'il est sous tens io n. Ne regardez jamais directement le port à fibres optiques et les embouts de câbles à fibres optiques tant qu'ils son t sous tension.
66 A PPENDIX A: S AFETY I NFORMATION Wichtige Sicherhe itsinformationen VORSICHT : Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen.
Wichtige Sich erheitsinformationen 67 VORSICHT : RJ-4 5-Porte. Diese Por te si nd geschützte Datensteckdosen. Sie dürfen weder wie normale tr adit ionelle T elefonsteckdosen noch für die V erbindung der Einheit mit eine m trad itionellem privatem oder öffentlichem T elefonn etzwerk gebraucht werden.
68 A PPENDIX A: S AFETY I NFORMATION.
B P IN - OUTS Null Modem Cable 9-pin t o RS-232 25-pin PC-A T Seria l Cable 9-pin to 9-pin.
70 A PPENDIX B: P IN - OUTS Modem Cable 9-pin to RS-232 25-pin RJ-45 Pin Assignments Pin assignments are identical for 10/100BASE-T and 100 0BASE-T RJ-45 connectors.
RJ-45 Pin Assignments 71 T able 11 Pin assignments Pin Number 10/100BASE-T 1000BASE-T Ports configured as MDIX 1 Receive Data + Bidirectional Data B+ 2 Receive Data - Bidirectional Data B- 3 Transmit .
72 A PPENDIX B: P IN - OUTS.
C T ECHNICAL S PECIFICATIONS The technical specifications for the Switches in the Switch 4900 Series ar e the same unless otherwise stated. Physical Dimensions Switch 4900 : Switch Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x Depth: 363.4 mm (14.
74 A PPENDIX C: T ECHNICAL S PECIFICATIONS Heat Dissipation Switch 4900 : 1050 BTU/hour maximum Switch 4900 SX : 560 BTU/hour maximum Switch 4924: 870 BTU/hour maximum Switch 4950: 685 BTU/hour maximu.
D T ECHNICAL S UPPORT 3Com provides easy access to tech nical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the most r ecent information, 3C om recommends that you access the 3Com Corporatio n Wor ld Wide Web site.
76 A PPENDIX D: T ECHNICAL S UPPORT 3Com F TP Site Download drivers, patches, softw are, a nd MIBs acr oss the Inter net from the 3Com public F TP site. This service is av ailable 24 hours a day , 7 days a week. T o connect to the 3Com F TP site, enter the following information into your F TP client: ■ Hostname: ftp.
Support from 3Com 77 Support from 3Com If you are unable to obtain assistan ce from the 3Com online technical resour ces or from your network supplier , 3Com offers email and telephone technical supp ort services. T o find out more about your support options, email or call the 3Com technical support services at the location nearest you.
78 A PPENDIX D: T ECHNICAL S UPPORT Here is a list of worldwide technical telephone support numbers. These numbers are corr ect at the time of publication.
Returning Products for Repair 79 Returning Products for Repair Before you send a product dir ectly to 3Com for repair , you must first obtain an authorizat ion number . Products sent to 3Com without authorization numbers will be return ed to the sender unopened, at the sender’ s expense.
80 A PPENDIX D: T ECHNICAL S UPPORT Latin America Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonair e Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Republi c 1 800 988.
I NDEX Numbers 3C number 19 3Com Knowledgebase Web Services 75 3Com URL 75 A access levels of default users 51 approved GBIC transceivers 29 automatic setup 43 3Com Network Supervisor 43 console port .
82 I NDEX P passwords of default users 51 pin assignments modem cable 70 null modem cable 69 RJ-45 70 serial cable 69 pin-outs 69 ports 10/100/1000BASE-T 16 1000BASE-SX 16 GBIC 16 power socket 19 powe.
R EGULATORY N OTICES FCC S TATEMENT This equipment has been tested and found to comply wi t h the limits for a Class A digital device, pursu ant to part 15 of the FCC rules. These limits are designed to provide reasonable protection ag ainst harmful interference when the equipment is operated in a co mmercial environment.
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 3Com DUA1770-0AAA04 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 3Com DUA1770-0AAA04 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso 3Com DUA1770-0AAA04 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul 3Com DUA1770-0AAA04 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il 3Com DUA1770-0AAA04, 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 3Com DUA1770-0AAA04.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il 3Com DUA1770-0AAA04. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo 3Com DUA1770-0AAA04 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.
