3Com 3000 TX - Manuals

1 G ETTING S TARTED About the Switch 3000 TX Switching is currently a leading option for increasing performance by providing high speed backbone links and eliminating server bottlenecks. Part of the 3Com SuperStack ® II range of products, the Switch 3000 TX provides simple, low cost and high perfor-...

1-2 C HAPTER 1: G ETTING S TARTED Port Connections 100BASE-TX Ports The Switch has eight Fast Ethernet 100BASE-TX ports configured as MDIX (cross-over), which provide a 100Mbps connection to other Fast Ethernet devices such as the SuperStack II Switch 1000. The maximum segment length is 100m (328ft)...

About the Switch 3000 TX 1-3 Virtual LANs (VLANs) The Switch 3000 TX has a Virtual LAN (VLAN) fea-ture which allows you to build your network seg-ments without being restricted by physical connections. A VLAN is defined as a group of loca-tion- and topology-independent devices that com-municate as i...

1-4 C HAPTER 1: G ETTING S TARTED Network Configuration Examples The following two illustrations show some exam-ples of how the Switch 3000 TX can be used on your network. Figure 1-1 The Switch 3000 TX used as a data-center switch Examples of how the Switch 3000 TX can be used in a VLAN-based networ...

1-6 C HAPTER 1: G ETTING S TARTED Unit Overview — Front Figure 1-3 Switch 3000 TX front view

Unit Overview — Front 1-7 100BASE-TX Ports The Switch 3000 TX has eight Fast Ethernet 100BASE-TX RJ45 ports configured as MDIX (cross-over), which provide connection to other Fast Ethernet devices such as the SuperStack II Switch 1000. The maximum segment length is 100m (328ft) over category 5 UTP o...

1-8 C HAPTER 1: G ETTING S TARTED Unit Overview — Rear Figure 1-4 Switch 3000 TX rear view

Unit Overview — Rear 1-9 Power Socket The Switch 3000 TX automatically adjusts to the supply voltage. The fuse is suitable for both 110V A.C. and 220–240V A.C. operation. For informa-tion on replacing fuses, refer to Appendix A . Unit Serial Number You may need this serial number for fault reporting...

1-10 C HAPTER 1: G ETTING S TARTED Unit Defaults The following table shows the factory defaults for the Switch 3000 TX features. Managing the Switch 3000 TX The menu-driven interface built into the Switch 3000 TX is known as the VT100 interface. You can access it using a VT100 terminal, or a PC usin...

Quick Start For SNMP Users 1-11 Quick Start For SNMP Users This section describes how to get started if you want to use an SNMP Network Manager to manage the Switch. It assumes you are already familiar with SNMP management. ■ If you are using IP and you have a BOOTP server set up correctly on your n...

2 I N S T A L L A T I O N A N D S E T U P Following Safety Information Before installing or removing any components from the Switch or carrying out any maintenance proce-dures, you must read the safety information pro-vided in Appendix A of this guide. Positioning the Switch 3000 TX The Switch is su...

2-2 C HAPTER 2: I NSTALLATION AND S ETUP Configuration Rules for Fast Ethernet The topology rules for 100Mbps Fast Ethernet are slightly different to those for 10Mbps Ethernet. Figure 2-1 illustrates the key topology rules and pro- vides examples of how they allow for large-scale Fast Ethernet netwo...

2-4 C HAPTER 2: I NSTALLATION AND S ETUP Installing the Switch 3000 TX Rack Mounting The Switch is 1.5U high and fits in most standard 19-inch racks. CAUTION: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the underside of the unit, if fitted. 1 Place the...

Installing the Switch 3000 TX 2-5 Wall Mounting A single Switch can be wall-mounted. CAUTION: Disconnect any cables from the unit before continuing. Remove self-adhesive pads from the underside of the unit if they have been previously fitted. 1 Place the Switch the right way up on a hard flat sur-fa...

2-6 C HAPTER 2: I NSTALLATION AND S ETUP Powering-Up the Switch 1 Connect the power cord to the IEC socket on the rear of the Switch, and to your mains socket. The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is through the power cord. 2 The Switch enters a...

Connecting Equipment to the Console Port 2-7 Connecting Equipment to the Console Port The Switch console port settings are set to: ■ 8 data bits ■ no parity ■ 1 stop bit The terminal connected to the console port on the Switch must be configured with the same settings. This procedure is described in...

2-8 C HAPTER 2: I NSTALLATION AND S ETUP Connecting a Workstation Running SLIP You can communicate with the Switch via the con-sole port from a workstation running SLIP (Serial Line Internet Protocol). In this way, you can perform out-of-band management using Telnet or SNMP. Cables required for this...

3 S ETTING U P FOR M ANAGEMENT Methods of Managing the Switch 3000 TX You can manage the Switch in four ways: ■ Using the VT100 interface by connecting a VT100 terminal (or workstation with terminal emulation software) to the Switch console port. ■ Using the VT100 interface over a TCP/IP network usi...

3-2 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Using Telnet Any Telnet facility that emulates a VT100 terminal should be able to communicate with the Switch over a TCP/IP network. Up to three active Telnet ses-sions can access the Switch concurrently. If a con-nection to a Telnet session is lost inadv...

Managing Over The Network 3-3 If your network is internal to your organization only, you may use any arbitrary IP address. We sug-gest you use addresses in the series 191.100.X.Y, where X and Y are numbers between 1 and 254. Use 191.101.X.Y for the SLIP address. If your network has a connection to t...

3-4 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Navigating the VT100 Screens Screen Conventions To differentiate types of information, the VT100 screens use the following conventions: Type of information Shown on screen as... Description Choice Field ♦ text ♦ Text enclosed with markers is a list from w...

Navigating the VT100 Screens 3-5 Keyboard Shortcuts There are several special characters or combinations of characters that allow you to make shortcuts: [Tab] allows you to move from one field to the next, on any screen without making any changes. [Return] moves you to the next field on a form after...

3-6 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Setting up the Switch for Management The following sections describe how to get started if you want to use an SNMP Network Manager to manage the Switch. It assumes you are already familiar with SNMP management. If not, we recom-mend the following publicat...

Setting up the Switch for Management 3-7 ■ If you have been assigned a user name and pass-word, enter those details. ■ If you are logging on for the first time (after installation or initialization), use a default user name and password to match your access requirements. The defaults are shown in Ta...

3-8 C HAPTER 3: S ETTING U P FOR M ANAGEMENT After Logging On When you have successfully logged on to the Switch, the Main Menu screen is displayed as shown in Figure 3-3 . From here, you can select the options needed to manage the unit. Refer to the screen map on page 4-1 . If you have installed an...

Setting up the Switch for Management 3-9 Switch Management Setup The Management Setup screen allows you to con-figure IP, IPX, and SLIP parameters for the Switch. This screen also allows you to display screens for setting up the console port and traps. To access the Setup screen, from the Switch Mai...

3-10 C HAPTER 3: S ETTING U P FOR M ANAGEMENT If you suspect that there is a problem with the Switch that has not been detected by the Normal tests, set this field to Extended and reset the Switch (refer to “Resetting the Switch 3000 TX” on page 4-26 ). If you set the Switch to perform an Extended t...

Setting up the Switch for Management 3-11 CONSOLE PORT Select this button to display 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 ETTING U P FOR M ANAGEMENT Logging Off If you have finished using the VT100 management interface, select the LOGOFF option from the bottom of the main menu. If you accessed the VT100 management interface using a Telnet session or modem connection, the connection is closed automati...

4 M A N A G I N G T H E S W I T C H 3000 TX Figure 4-1 Screen map Chapters 4 and 5 describe all management facilities for the Switch. While following steps in these chap-ters, you may find the screen map below useful: If an ATM OC-3c Module is installed in the Switch, extra screens are available. Re...

4-2 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Setting Up Users From the Main Menu, select USER ACCESS LEVELS. The User Access Levels screen is displayed as shown in Figure 4-2 . From this screen you can access: ■ LOCAL SECURITY screen — This allows you to set up access levels for users on the Switc...

Creating a New User 4-3 Creating a New User These steps assume the User Access Levels screen is displayed. 1 Select the CREATE USER option. The Create User screen is displayed, as shown in Figure 4-3 . 2 Fill in the fields and assign an access level for the new user. 3 When the form is complete, sel...

4-4 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Deleting a User These steps assume the User Access Levels screen is displayed. 1 Select the DELETE USERS option. The Delete Users screen is displayed as shown in Figure 4-4 . 2 Use the spacebar to highlight the user that you want to delete. Note that yo...

Editing User Details 4-5 Editing User Details These steps assume the User Access Levels screen is displayed. 1 Select the EDIT USER option. The Edit User screen is displayed, as shown in Figure 4-5 . 2 Fill in the fields as required. 3 When you have completed the changes, select OK. The Edit User sc...

4-6 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Assigning Local Security The Local Security screen shows a matrix of options for access method (Console Port, Remote Telnet, Community-SNMP) and access level. These steps assume the User Access Levels screen is displayed. 1 Select the LOCAL SECURITY opt...

Choosing a Switch Management Level 4-7 Choosing a Switch Management Level The Switch Management screen allows you to: ■ Choose between managing a port, the unit, or a VLAN ■ Display screens for setting up the Switch ■ Display a screen for managing the Switch Data-base ■ Display screens for managing ...

4-8 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX STP Use this button to display screens for managing Spanning Tree Protocol (STP) information for the level of management you have chosen (port or VLAN). Refer to “Spanning Tree Protocol” on page 5-12 . STP is not supported over Asynchronous Transfer Mod...

Setting Up the Switch Unit 4-9 Setting Up the Switch Unit With the Switch Management screen displayed, choose the management level Unit, then select the SETUP button. The Unit Setup screen is displayed as shown in Figure 4-10 . The screen shows the following fields: Unit Name This read-only field sh...

Setting Up the Switch Ports 4-11 Setting Up the Switch Ports With the Switch Management screen displayed, choose the management level Port . Choose the appropriate port, then select the SETUP button. The Port Setup screen is displayed, as shown in Figure 4-11 . If the port is an ATM OC-3c Module por...

4-12 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX IFM is not available on a port that has full duplex enabled: ■ If the Duplex Mode field in this screen is set to Full Duplex, the Intelligent Flow Management field is not displayed ■ In all other cases where the port has full duplex enabled, IFM has no...

Setting Up the Switch Ports 4-13 ■ Unit Default — The port uses Port VLAN Mode or AutoSelect VLAN Mode depending on the con-tents of the VLAN Configuration Mode field in the Unit Setup screen. This is the default setting. For more information, refer to “Using AutoSelect VLAN Mode” on page 5-4 . Broa...

Setting Up the Switch Database (SDB) 4-15 Setting Up the Switch Database (SDB) The Switch maintains a database of device addresses that it receives on its ports. It uses the information in this database to decide whether a frame should be forwarded or filtered. The database holds up to a maximum of ...

4-16 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX The Database View The Unit Database View screen, as shown in Figure 4-12 , allows you to view and configure the Switch Database. To access the Unit Database view screen, display the Switch Management screen, choose the man-agement level Unit , then sel...

Setting Up the Switch Database (SDB) 4-17 DELETE This button allows you to delete entries from the database. You cannot delete an entry associated with a port that uses AutoSelect VLAN Mode. Searching the Switch Database You can search the switch database in two ways: by MAC address or port number. ...

4-18 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Setting Up Resilient Links You can configure a Switch to provide resilient links to another device so that network disruption is mini-mized if a link fails. A resilient link pair consists of a main link and a standby link. You define a resilient link p...

Setting Up Resilient Links 4-19 Configuring Resilient Links With the Switch Management screen displayed, choose the port to be the main port in the resilient link pair, then select the RESILIENCE button. The Port Resilience screen is displayed, as shown in Figure 4-14 . This screen allows you to set...

4-20 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX ■ Both Failed — Although the resilient link is cor- rectly configured, both links have failed. This could be due to loose connections or cable dam-age. ■ Unknown — The network configuration has changed and the resilient link pair no longer con-forms to...

Setting Up Resilient Links 4-21 Viewing the Resilient Links Setup With the Switch Management screen displayed, choose the management level Unit and select the RESILIENCE button. The Unit Resilience Summary screen is displayed, as shown in Figure 4-15 . This screen shows the cur- rent resilient link ...

4-22 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Pair Enable Enabled / Disabled This field displays whether this resilient link pair is currently enabled or disabled. You enable or disable a resilient link pair using the Port Resilience screen described in “Con- figuring Resilient Links” on page 4-19...

Setting Up Traps 4-23 Setting Up Traps Traps are messages sent across the network to an SNMP Network Manager. They alert the network administrator to faults or changes at the Switch device. Your Network Manager may automatically set up traps in the Switch Trap Table. Check the documen-tation accompa...

4-24 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Setting up the Console Port From the Management Setup screen, described in Chapter 3 , select the CONSOLE PORT button. The Console Port Setup screen is displayed, as shown in Figure 4-17 . If you change any of the console port parameters, you terminate...

Setting up the Console Port 4-25 Speed 1 200 / 2 400 / 4 800 / 9 600 / 19200 This field allows you to select the correct line speed (baud rate) for your terminal or modem. If you have enabled auto-configuration, the line speed is set automatically. Char Size 8 This read-only field displays the chara...

4-26 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Resetting the Switch 3000 TX If you suspect a problem with the Switch 3000 TX, you can reset it. 1 From the Main Menu, select the RESET option. The Reset screen is displayed, as shown in Figure 4-18 . 2 Select OK. Resetting the Switch in this way is si...

Initializing the Switch 3000 TX 4-27 Initializing the Switch 3000 TX This screen allows you to perform a reset as described in the previous section, and in addition, returns non-volatile data stored on the unit to its factory defaults (shown on page 1-10 ). Note that the IP address is not cleared. Y...

4-28 C HAPTER 4: M ANAGING T HE S WITCH 3000 TX Upgrading Software When 3Com issues a new version of the software image for the Switch, you can obtain it from 3Com’s information delivery systems, described in “Online Technical Services” on page F-1 . For upgrading ATM OC-3c Module software, refer to...

5 A DVANCED M ANAGEMENT Virtual LANs (VLANs) Setting up Virtual Local Area Networks (VLANs) on the Switch 3000 TX provides you with less time-con-suming network administration and more efficient network operation. The following sections explain more about the con-cept of VLANs and explain how they c...

5-2 C HAPTER 5: A DVANCED M ANAGEMENT How VLANs Ease Change and Movement With traditional IP networks, network administra-tors spend much of their time dealing with moves and changes. If users move to a different IP subnet, the IP addresses of each endstation must be updated manually. With a VLAN se...

Virtual LANs (VLANs) 5-3 VLANs and the Switch 3000 TX The Switch 3000 TX supports VLANs which consist of a set of switch ports. Each switch port can only belong to one VLAN at a time, regardless of the device to which it is attached. Each Switch 3000 TX can support up to 16 VLANs. However, you can h...

5-4 C HAPTER 5: A DVANCED M ANAGEMENT Using AutoSelect VLAN Mode By default, all ports on the Switch use Port VLAN Mode — where each switch port is manually placed in the required VLAN. The Switch allows some ports to use another mode, AutoSelect VLAN Mode. In this mode, the ports are automatically ...

Virtual LANs (VLANs) 5-5 If you use AutoSelect VLAN Mode, note the follow-ing: ■ You need to specify an IP address and community string for the VLAN Server. ■ You cannot use VLAN 15. ■ If a port has been configured as a backbone port or as a VLT port, the port cannot use AutoSelect VLAN Mode. ■ If a...

5-6 C HAPTER 5: A DVANCED M ANAGEMENT VLAN Configuration Example The example shown in Figure 5-5 illustrates two VLANs spanning three Switch 1000 units and a basement Switch 3000 TX unit. Each Switch 1000 connects to the basement Switch using a VLT. The attached router allows the two VLANs to commun...

5-8 C HAPTER 5: A DVANCED M ANAGEMENT Setting Up VLANs on the Switch The VLAN Setup screen allows you to: ■ Assign ports to VLANs, if those ports use Port VLAN Mode. ■ View VLAN setup information for the Switch. To access the VLAN Setup screen: 1 From the Main Menu, select SWITCH MANAGE-MENT. The Sw...

Virtual LANs (VLANs) 5-9 Port ID 1 / 2 / 3 ... 6 / 7 / 8 This field displays the ID of the port currently selected in the listbox. VLAN ID 1 / 2 / 3 ...14 / 15 / 16 If the port speci- fied in the Port ID field uses Port VLAN Mode, this field allows you to enter the ID of the VLAN to which the port i...

5-10 C HAPTER 5: A DVANCED M ANAGEMENT Setting Up VLANs Using AutoSelect VLAN Mode To set up VLANs using AutoSelect VLAN Mode, you need to: ■ Specify information about the VLAN Server ■ Specify that the Switch unit, or individual ports on the unit, use AutoSelect VLAN Mode Specifying Information Abo...

Virtual LANs (VLANs) 5-11 Specifying AutoSelect VLAN Mode To specify that the Switch uses AutoSelect VLAN Mode, refer to “Setting Up the Switch Unit” on page 4-9 . To specify that a port on the Switch uses AutoSe-lect VLAN Mode, refer to “Setting Up the Switch Ports” on page 4-11 .

5-12 C HAPTER 5: A DVANCED M ANAGEMENT Spanning Tree Protocol Using the Spanning Tree Protocol (STP) functionality of your Switch makes your network more fault toler-ant. The following sections explain more about STP and the STP features supported by the Switch. STP is not currently supported over a...

5-14 C HAPTER 5: A DVANCED M ANAGEMENT How STP Works STP Initialization Initially, the STP system requires the following before it can configure the network: ■ Communication between all the bridges. This communication is carried out using Bridge Proto-col Data Units (BPDUs), which are transmitted in...

Spanning Tree Protocol 5-15 An Example Figure 5-11 illustrates part of a network. All bridges have a path cost value assigned to each port, identi-fied by PC=xxx (where xxx is the value). Bridge A is selected by STP as the Root Bridge, because it has the lowest Bridge Identifier. The Designated Brid...

5-16 C HAPTER 5: A DVANCED M ANAGEMENT STP Configurations Figure 5-12 shows two possible STP configurations using SuperStack II Switch units: ■ Configuration 1 — Redundancy for Back-bone Link In this configuration, a Desktop Switch and Switch 3000 TX both have STP enabled and are connected by two Fa...

Spanning Tree Protocol 5-17 Enabling STP on the Switch To enable STP on your Switch: 1 From the VT100 Main Menu, select SWITCH MANAGEMENT. The Switch Management screen is displayed. 2 In the Management Level field, choose Unit. 3 Choose the SETUP button. The Unit Setup screen is displayed as shown i...

5-18 C HAPTER 5: A DVANCED M ANAGEMENT Configuring STP on the Switch CAUTION: You should not configure any STP parameters unless you have considerable knowl-edge and experience with STP . Configuring the STP Parameters of VLANs The Switch has a completely separate STP system for each VLAN that you h...

Spanning Tree Protocol 5-19 Forward Delay 4 ... 30 This read-only field shows the time (in seconds) that the ports on the Switch spend in the listening and learning states. For more information about these states, refer to “Configur- ing the STP Parameters of Ports” on page 5-20 . Root Port This rea...

5-20 C HAPTER 5: A DVANCED M ANAGEMENT Configuring the STP Parameters of Ports The Port STP screen allows you to set up and manage the STP parameters of each port on the Switch. To access the Port STP screen: 1 From the Main Menu, select SWITCH MANAGE-MENT. The Switch Management screen is displayed....

Spanning Tree Protocol 5-21 Designated Root This read-only field shows the Bridge Identifier of the Root Bridge. Designated Cost This read-only field shows the path cost from the Root Bridge to the Designated Bridge Port for the current port’s segment. Designated Bridge This read-only field shows th...

5-22 C HAPTER 5: A DVANCED M ANAGEMENT RMON Using the RMON (Remote Monitoring) capabilities of your Switch allows network administrators to improve their efficiency and reduce the load on their network. The following sections explain more about the RMON concept and the RMON features supported by the...

5-24 C HAPTER 5: A DVANCED M ANAGEMENT important occurrences, you can depend on the Event group for notification. Through the SNMP traps, events can trigger other actions providing a mechanism for an automated response to certain occurrences. Benefits of RMON Using the RMON features of your Switch h...

RMON 5-25 RMON Features of the Switch Table 5-2 details the RMON support provided by the Switch. Table 5-2 RMON support supplied by the Switch RMON Group Support supplied by the Switch Statistics A new or initialized Switch has one Statistics ses-sion per port/VLAN. History A new or initialized Swit...

5-26 C HAPTER 5: A DVANCED M ANAGEMENT When using the RMON features of the Switch, you should note the following: ■ After the default sessions are created, they have no special status. You can delete or change them as required. ■ The Switch 3000 TX can forward a very large volume of packets per seco...

RMON 5-27 About Default Alarm Settings A new or initialized Switch has four alarms defined for each port: ■ Bandwidth used ■ Broadcast bandwidth used ■ Percentage of packets forwarded ■ Errors per 10,000 packets The default values and actions for each of these alarms are given in Table 5-4 . About t...

6-2 C HAPTER 6: S TATUS M ONITORING AND S TATISTICS Summary Statistics With the Switch Management screen displayed, choose the management level Unit , then select the STATISTICS button. The Summary Statistics screen is displayed, as shown in Figure 6-1 . The Summary Statistics screen lists values fo...

Port Statistics 6-3 Port Statistics With the Switch Management screen displayed, choose the management level port , then select the STATISTICS button. The Port Statistics screen is dis-played as shown in Figure 6-2 . As well as showing statistics for the port, the Port Statistics screen allows you a...

6-4 C HAPTER 6: S TATUS M ONITORING AND S TATISTICS Port Traffic Statistics With the Port Statistics screen displayed, select the TRAFFIC STATISTICS button. The Port Traffic Statistics screen is displayed, as shown in Figure 6-3 . The Port Traffic Statistics screen shows the follow-ing: Port ID The ...

6-6 C HAPTER 6: S TATUS M ONITORING AND S TATISTICS Port Error Analysis With the Port Statistics screen displayed, select the ERROR ANALYSIS button. The Port Error Analysis screen is displayed as shown in Figure 6-4 . The Port Error Analysis screen shows the following: Port ID The ID of the port you...

Port Error Analysis 6-7 Jabbers The total number of packets received that were longer than 8K octets (excluding framing bits, but including FCS octets). CLEAR SCREEN COUNTERS Select this button to set all counters shown on the screen to zero. It is useful for trend analysis if you wish to see change...

6-8 C HAPTER 6: S TATUS M ONITORING AND S TATISTICS Status Monitoring The status screen provides read-only information about the Switch. This information may be useful for your technical support representative in the event of a problem. To access the screen, from the Main Menu, select the STATUS opt...

Fault Log 6-9 Fault Log The Fault Log displays read-only information about the Switch which is updated whenever an abnor-mal condition is detected. This information is for internal 3Com use only. You may be asked to quote this information if reporting a fault to your supplier. With the Status screen...

6-10 C HAPTER 6: S TATUS M ONITORING AND S TATISTICS Remote Polling The Remote Poll screen allows you to send a single frame to a remote device to see if that device is responding. This can help to locate the source of a network problem. It is also particularly helpful in locating devices that suppo...

A S AFETY I NFORMATION Before carrying out any installation or removal of components, or any maintenance procedures on the Switch, you must read the following safety information. Important Safety Information WARNING: Warnings contain directions that you must follow for your personal safety. Follow a...

A-2 A PPENDIX A: S AFETY I NFORMATION ■ It is essential that the mains socket outlet is installed near to the unit and is accessible. You can only disconnect the unit by removing the appliance coupler from the unit. ■ If the power supply plug is unsuitable and you have to replace it, you may find ot...

Important Safety Information A-3 Power Supply and Fuse The unit automatically adjusts to the supply volt-age. The fuse is suitable for both 110V A.C. and 220–240V A.C. operation. WARNING: Ensure that the power is disconnected before opening the fuse holder cover. To change the fuse, release the fuse...

A-4 A PPENDIX A: S AFETY I NFORMATION L’information de Sécurité Importante AVERTISSEMENT: Les avertissements contiennent les directions que vous devez suivre pour votre sécu-rité personnelle. Suivez toutes les directives avec soin. Veuillez lire à fond l'information de la sécurité suiva-nte avant d'...

L’information de Sécurité Importante A-5 ■ Assurer que l'entrée de la source d'alimentation soit débranchée avant d'ouvrir le couvercle de fusible du connecteur IEC ou d'enlever le couver-cle de l'unité. ■ Seulement Pour La France et Le Pérou: ■ Cette unité ne peut pas être mise en marche des source...

A-6 A PPENDIX A: S AFETY I NFORMATION Socle Pour Alimentation Multiple Brancher seulement une alimentation multiple de 3Com à cet socle. Suivre pour les détails les direc-tives de l'installation dans le manuel qui accompa-gne l'alimentation multiple. Les Ports RJ45 AVERTISSEMENT: Ceux-ci sont les pr...

Wichtige Sicherheitsinformationen A-7 Wichtige Sicherheitsinformationen WARNUNG: Warnungen enthalten Anweisungen, die zur eigenen Sicherheit unbedingt zu beachten sind. Bitte befolgen Sie alle Anweisungen sorgfältig und genau. Bitte unbedingt vor dem Einbauen des Switch Ein-heit die folgenden Sicher...

A-8 A PPENDIX A: S AFETY I NFORMATION Stromversorgung und Sicherung Das Gerät stellt sich automatisch auf die Versor-gungsspannung ein. Die Sicherung ist sowohl für 110V A.C. wie für 220–240V A.C. geeignet. WARNUNG: Vor dem Öffnen der Sicherungshalter- ung das Gerät vom Netzstrom trennen. Zum Auswec...

B S CREEN A CCESS R IGHTS The following table lists the rights assigned to each level of user for accessing and editing Switch screens via the VT100 interface. All access rights are read-and-write unless other-wise stated. Screen Available to... Logon Monitor Manager Security Main Menu Monitor Manag...

C T R O U B L E - S H O O T I N G The following is a list of problems you may see when managing the Switch with suggested courses of corrective action to take. If you have a problem which is not listed here and you cannot solve it, contact your local technical support representative. LEDs Power LED ...

C-2 A PPENDIX C: T ROUBLE - SHOOTING Using the VT100 Interface The initial Main Banner screen does not dis-play: Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal. For console port access, you may need to press [Return] several times before the Main...

Using the Switch C-3 Check that the port through which you are trying to access the device is in VLAN 1 (the Default VLAN). Refer to “Setting Up VLANs on the Switch” on page 5-8 . Try accessing the device through a different port. If you can now access the device, a problem with the original port is...

Using the Switch C-5 You are trying to manage the Switch over a network which has STP, and you are losing con-tact with the management agent intermittently. As shown in Figure C-1 , there is a SuperStack ® II Switch unit (Switch A) between your management workstation and the Switch 3000 TX (Switch B...

D P IN - OUTS Null Modem Cable 9-pin to RS-232 25-pin PC-AT Serial Cable 9-pin to 9-pin

D-2 A PPENDIX D: P IN - OUTS Modem Cable 9-pin to RS-232 25-pin RJ45 Pin Assignments

E S WITCH 3000 TX T ECHNICAL S PECIFICATIONS Physical Dimensions Height: 76mm (3.0in) x Width: 483mm (19.0in) x Depth: 300mm (12.0in) Weight: 4.4kg (9.7lbs) Environmental Requirements Operating Temperature 0–50°C (32–122°F) Storage Temperature -10–70 °C (14–158°F) Operating Humidity 10–95% relative ...

E-2 A PPENDIX E: S WITCH 3000 TX T ECHNICAL S PECIFICATIONS Standards Supported SNMP SNMP protocol (RFC 1157) MIB-II (RFC 1213) Bridge MIB (RFC 1493) Repeater MIB (RFC 1516) VLAN MIB (RFC 1573) RMON MIB (RFC 1271 and RFC 1757) Terminal Emulation Telnet (RFC 854) Protocols Used for Administration UDP...

F T ECHNICAL S UPPORT 3Com provides easy access to technical 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 very latest, we recom-mend that you access 3Com Corporation’s Worl...

F-2 A PPENDIX F: T ECHNICAL S UPPORT Access by Digital Modem ISDN users can dial in to 3ComBBS using a digital modem for fast access up to 56 Kbps. To access 3ComBBS using ISDN, use the following number: (1) 408 654 2703 3ComFacts Automated Fax Service 3Com Corporation’s interactive fax service, 3Co...

Support from Your Network Supplier F-3 Support from Your Network Supplier If additional assistance is required, contact your network supplier. Many suppliers are authorized 3Com service partners who are qualified to provide a variety of services, including network planning, installation, hardware ma...

F-4 A PPENDIX F: T ECHNICAL S UPPORT Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain a Return Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’s expense. T...

G LOSSARY 10BASE-T The IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP) cabling. 100BASE-FX 100Mbps Ethernet implementation over fiber. 100BASE-TX 100Mbps Ethernet implementation over category 5 and Type 1 Twisted Pair cabling. ageing The automatic removal of dynamic entries ...

G LOSSARY 3 LAN Local Area Network. A network of connected com-puting resources (such as PCs, printers, servers) cov-ering a relatively small geographic area (usually not larger than a floor or building). Characterized by high data rates and low error rates. latency The delay between the time a devi...

G LOSSARY 5 TFTP Trivial File Transfer Protocol. Allows you to transfer files (such as software upgrades) from a remote device using your Switch unit’s local management capabilities. Transcend ® 3Com’s umbrella management system used to manage all of 3Com’s networking solutions. UDP User Datagram pr...

I NDEX Numerics 100BASE-TX port 1-2, 1-83Com Bulletin Board Service (3ComBBS) F-13Com sales offices F-33Com URL F-13ComFacts F-23ComForum F-2 A Access Level field 4-3access rights B-1Active Port field 4-20, 4-21ageing entries 4-15ageing time, specifying 4-10agent software version number 6-8alarm act...

E LECTRO -M AGNETIC C OMPATIBILITY S TATEMENTS FCC S TATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipm...