Manuale d’uso / di manutenzione del prodotto TR del fabbricante 3Com
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® http://www.3com.com/ S UPER S TACK II ™ S WITCH 2000 TR U SER G UIDE V ersion 4.0 Part No. 99032 Published October 1997.
3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145 © 3Com Corporation, 1997. All rights reserved. No part of this documentation may be repr oduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation.
C ONTENTS A BOUT T HIS G UIDE Introduction 1 How to Use This Guide 1 Conventions 1 Related Publications 2 1 O VERVIEW About the SuperStack ™ II Switch 2000 TR 1-1 System Benefits 1-1 System Feature.
Configuration Guidelines 2-3 Power Supply and Fuse 2-3 Replacing the Fuse 2-3 Installing the Slide-in Modules 2-3 Installing the Switch 2000 TR 2-5 Rack Mounting 2-5 W all Mounting 2-5 Stack Mounting.
4 C ONFIGURING WITH THE VT100 I NTERFACE Quick Setup 4-2 Bridge Configuration 4-3 Setting Source Routing T ransparent (VT100) 4-3 Setting Source Route Bridging 4-4 Setting T ransparent Bridging 4-4 Spanning T ree Fields 4-5 Spanning T ree Parameters 4-5 Port Configuration 4-6 Setting Up Ports 4-6 Setting the Port Admin.
5 C ONFIGURING WITH THE LCD C ONSOLE Unit Configuration 5-1 Bridge Configuration 5-2 Port Configuration 5-3 Setting Port ID 5-3 Viewing Link State 5-3 Setting Port State 5-4 Setting Speed 5-4 Setti.
F T ECHNICAL S UPPORT Online T echnical Services F-1 World Wide Web Site F-1 3Com Bulletin Board Service F-1 Access by Analog Modem F-1 Access by Digital Modem F-2 3ComFacts Automated Fax Service F-2 .
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A BOUT T HIS G UIDE Introduction This guide provides the information you need to install and configure the SuperStack II™ Switch 2000 TR (3C510600) into your T oken Ring network for maximum benefit. This guide is intended for use by network administra- tors responsible for installing and setting up network- ing equipment.
2 A BOUT T HIS G UIDE Related Publications Within the Switch 2000 TR document set: ■ Switch 2000 TR Quick Reference Guide. (Part Number #99033) ■ Switch 2000 TR User Guide.
1 O VERVIEW This chapter describes the major features, compo- nents, and concepts of the Switch 2000 TR, including: ■ About the SuperStack™ II Switch 2000 TR ■ Summary of Features ■ T ypical A.
1-2 C HAPTER 1: O VERVIEW ■ Port population —High density port population relieves traf fic congestion and supports 4 and 16 Mbps data rates. In addition, the Switch 2000 TR has four custom-configurable ports designed for direct workstation or dedicated server connection.
Summary of Features 1-3 ■ Roving Analysis —The Roving Analysis Port (RAP) feature allows you to configur e the SuperStack II Switch 2000 TR to capture and monitor traf fic on any T oken Ring LAN connected to the switch using any industry-standard LAN analyzer .
1-4 C HAPTER 1: O VERVIEW ■ SNMP over IP ■ SNMP MIB II ■ Bridge MIB ■ SR Bridge MIB ■ BOOTP ■ Switch 2000 TR Private (3Com Private) ■ Part of SuperStack ™ II architectur e ■ Redundan.
Ring Segmentation 1-5 Ring Segmentation High-speed switches offer a mor e efficient solution over 2-port PC bridges or routers. As illustrated below , segmentation with a T oken Ring switch brings immediate improvement over existing networks by re-distributing traf fic .
1-6 C HAPTER 1: O VERVIEW The Front Panel This section describes the front panel components and LEDs of the SuperStack II Switch 2000 TR. Figur e 1-3 shows the front panel.
The Front Panel 1-7 RJ-45 Ports 12 RJ-45 ports support unshielded T wisted Pair (UTP) or Shielded T wisted Pair cabling (STP) at 4 Mbps or 16 Mbps wire speed.
1-8 C HAPTER 1: O VERVIEW The Rear Panel This section describes the rear panel components of the Switch 2000 TR. Figur e 1-5 shows the rear panel. Figure 1-5 Switch 2000 TR Rear Panel * Refer to the appropriate module installation manual for mor e information.
Optional Slide-In Modules 1-9 Power Socket The Switch 2000 TR automatically adjusts to the supply voltage. The fuse is suitable for both 110 AC and 220-240 AC operation. Refer to “Replacing the Fuse in Chapter 2 for information on replacing fuses. NOTE: The Switch 2000 TR has no ON/OFF switch.
1-10 C HAPTER 1: O VERVIEW to run each of these bandwidth-intensive applications across networks. The primary benefits of A TM include: ■ A TM is a cell-based communications technology that easily scales from T1 or A TM 25 to OC-3 (155 Mbps), OC-12 (622 Mbps), OC-48 (2.
Optional Slide-In Modules 1-11 Benefits of FDDI Fiber Distributed Data Interface (FDDI) is a 100-Mbps fiber optic local area network standar d supported by the ANSI committee. The primary benefits of FDDI include: ■ A 100 Mbps point of aggregation for multiple T oken Ring segments.
1-12 C HAPTER 1: O VERVIEW ■ Manageability ■ Simple to configure and administer TR-in-FE allows both T oken Ring and Ether net to share the same Fast Ethernet physical wiring infra- structure and server base without impacting network performance.
Migrating to High-speed T echnologies 1-13 Migrating to High-speed T echnologies Managers want to migrate to FDDI, A TM, or TR-in-FE easily . Using Switch 2000 TRs, critical resour ces attach directly to high-speed technologies while preserving the investment in T oken Ring hardwar e.
1-14 C HAPTER 1: O VERVIEW High-speed Cascade Connectors These connectors provide a high-speed cascade con- nection between Switch 2000 TRs in a stack. Y ou can connect multiple units to form a single switched domain. Y ou can connect up to six Switch 2000 TRs with these connectors.
T oken Ring Switching Concepts 1-15 the destination ring station. A route is simply the path a packet takes through a sour ce route bridged net- work from the sour ce ring station to the destination ring station.
1-16 C HAPTER 1: O VERVIEW table, a switch knows which port must be used to reach each known MAC addr ess. Every time a switch receives a packet, it examines its bridging table to determine if the source MAC address is contained in its bridging table.
T oken Ring Switching Concepts 1-17 can use any path in the network. ARE packets are flooded through all bridges onto all rings. This cr eates multiple copies if redundant paths exist in the net- work. When multiple requests ar e received at the destina- tion; each one causes a response.
1-18 C HAPTER 1: O VERVIEW Cut-thru mode. The default mode for the Switch 2000 TR is Dynamic Cut-thru. VLANs A VLAN is defined as a group of location- and topol- ogy- independent devices that communicate as though they were on the same physical LAN.
2 G ETTING S TARTED This chapter describes the installation and setup pro- cedures for the Switch 2000 TR: ■ Important Safety Information ■ Positioning the Switch 2000 TR ■ Installing the Slide-.
2-2 C HAPTER 2: G ETTING S TARTED ■ If the power supply plug is unsuitable and you must replace it, r efer to the following specifica- tions: ■ Brown wir e to the Live (Line) plug terminal. The terminal may be marked with the letter L or col- ored r ed.
Installing the Slide-in Modules 2-3 Configuration Guidelines The cable topology rules for T oken Ring are shown below: Power Supply and Fuse The Switch 2000 TR automatically adjusts to the sup- plied voltage. The fuse is suitable for either 90-110V A.
2-4 C HAPTER 2: G ETTING S TARTED CAUTION: Always follow Electrostatic Discharge (ESD) procedures when installing an I/O Module. 1 If the Switch is connected to the network, turn off the power and disconnect the switch from the main power supply and the network.
Installing the Switch 2000 TR 2-5 Installing the Switch 2000 TR Rack Mounting The Switch 2000 TR fits a standard 19-inch data com- munications rack typically found in wiring closets. 1 Unpack the Switch 2000 TR and place it on a hard, flat surface. 2 Position one of the enclosed mounting brackets over the mounting holes and attach.
2-6 C HAPTER 2: G ETTING S TARTED Connecting Redundant Power System T o install an RPS, proceed as follows: 1 Power down by disconnecting the AC power cord on the Switch 2000 TR. 2 Connect an RPS cable assembly to the RPS connector on the back panel of the Switch 2000 TR.
Device Defaults 2-7 T able 2-3 Stack Defaults T able 2-4 Workgroup Defaults T able 2-5 Bridge Defaults Speed 16 Mbps Forwarding Mode Cut-through Dynamic Cut-thru Rising 20% Falling 10% Broadcast Storm.
2-8 C HAPTER 2: G ETTING S TARTED.
3 S ETTING U P FOR M ANAGEMENT This chapter describes background information for configuration and the procedur es for initial setup of the SuperStack II Switch 2000 TR, including: ■ Switch 2000 TR.
3-2 C HAPTER 3: S ETTING U P FOR M ANAGEMENT T able 3-1 Switch 2000 TR Management Options VT100 Management Interface The menu-driven interface for the Switch 2000 TR is known as the VT100 interface or Local Management interface.
Configuring Switch 2000 TR in Stack 3-3 Configuring Switch 2000 TR in Stack Head Unit One of the unique characteristics of the Switch 2000 TR is its ability to be part of a stack. When installed as members of a stack, up to 6 Switch 2000 TRs form the equivalent of a switching chassis, managed using the same IP address.
3-4 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Managing over the Network Any network manager application running Simple Network Management Protocol (SNMP) can manage the Switch 2000 TR, provided the Management Infor - mation Base (MIB) is installed correctly on the man- agement station.
Management Prerequisites 3-5 1-800-444-4345, 1-619-455-4600, 1-703-742-4777 ■ In Europe RIPE NCC Kruislaan 409 NL-1098 SJ Amsterdam The Netherlands T elephone number: +31 20 592 5065 ■ In Asia Pac.
3-6 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Source Routing Pr erequisites If you plan to operate the Switch 2000 TR in a source routing envir onment, you need to assign a segment ID. Follow the instructions below , from the Port Setup screen: 1 Select Bridge from the bottom of the Port Setup screen.
Switch 2000 TR Management Consoles 3-7 [Down Arrow] or [Return] to move to the next field. Refer to “Switch 2000 TR VT100 Console Interface Menu Map”. Entry Field Example display: [text] T ext enclosed in square brackets on the screen indi- cates a text entry field.
3-8 C HAPTER 3: S ETTING U P FOR M ANAGEMENT ■ [Ctrl] + [N] —Moves to the next screen after imple- menting current scr een settings. ■ [Ctrl] + [K] —Displays list of key strokes. Correcting T ext Entries Use [Delete] on a VT100 terminal or [Backspace] on a PC.
VT100 Console Menu Map 3-9 VT100 Console Menu Map Figure 3-4 displays the menu structur e for the Switch 2000 TR VT100 console interface. Figure 3-4 Switch 2000 TR VT100 Console Interface Menu Map I/O.
3-10 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Setting Up the VT100 Console This section provides instructions for setting up the VT100 console for local or remote management. 1 Connect a VT100-compatible terminal to the serial port of the Switch 2000 TR.
Setting Up the VT100 Console 3-11 Figure 3-8 Switch 2000 TR Management Setup Scr een 7 Fill in the following fields: ■ Device IP Address ■ Device Subnet Mask (if applicable) ■ Default Router (if applicable) 8 Select OK when you have finished Management Setup.
3-12 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Work Gr oup ID The workgroup number for purposes of manage- ment. Management is only part of a single work- group and should be viewed as a sub-net. If you move your management setup to a new or differ ent subnet, you will need to change the workgroup ID.
The LCD Console 3-13 The LCD Console This section describes the LCD Console. The LCD Console allows you to enter specific configuration parameters and obtain status data on the Switch 2000 TR without using a management workstation console or application.
3-14 C HAPTER 3: S ETTING U P FOR M ANAGEMENT LCD Console Menu Map Figure 3-10 displays the menu structur e for the LCD console interface on the front panel of the Switch 2000 TR. Figure 3-10 Switch 2000 TR LCD Console Menu Map Default Router Switch 2000 TR Unit Id.
Setting Up the LCD Console 3-15 Setting Up the LCD Console This section provides instructions for setting up the LCD console for local or remote management.
3-16 C HAPTER 3: S ETTING U P FOR M ANAGEMENT 10 Press [Enter]. A blank decimal notation appears in the Default Router field. 11 Enter the Default Router address as follows: ■ Select the value of the digit by moving the [Up or Down Arrow] until the desir ed value appears.
Setting Up BOOTP 3-17 Figure 3-12 Stack Setup Scr een (BootP Setup) 5 (Optional) Enter a sysname for the stack. 6 T oggle the [Space Bar] to Enable or Disable BootP .
3-18 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Auto Logout The Switch 2000 TR has a built-in auto logout feature which disables the VT100 interface after approxi- mately three minutes without keyboar d activity . This feature pr ovides a level of security for network man- agers.
Upgrading Software 3-19 Upgrading Software The Software Upgrade featur e allows you to down- load new software images using TFTP running over UDP/IP . When 3Com Corporation issues a new version of the software image for the Switch 2000 TR, you can obtain it from the 3Com Bulletin Boar d Service.
3-20 C HAPTER 3: S ETTING U P FOR M ANAGEMENT screen locks. When the download completes, the Switch 2000 TR automatically resets and r e-boots with the new software image. 7 In the File Name field, enter “UNIT # n”. Where “n” specifies the unit ID of the unit fr om which the download occurs.
Resetting the Switch 2000 TR 3-21 Resetting the Switch 2000 TR This section provides instructions for r esetting the Switch 2000 TR. Because some configurable parameters requir e that you reset the Switch 2000 TR after making changes, it is important to understand the reset pr ocedure before proceeding.
3-22 C HAPTER 3: S ETTING U P FOR M ANAGEMENT Reset Button The Switch 2000 TR has a reset button on the r ear panel of the unit. See Figure 3-16. T o reset the Switch 2000 TR using the Reset button, proceed as follows: 1 Locate the Reset button on the rear panel of the Switch 2000 TR.
4 C ONFIGURING WITH THE VT100 I NTERFACE The VT100 console is accessed via the serial console and provides access to all configuration, manage- ment, and monitoring facilities.
4-2 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Quick Setup The Quick Setup option provides dir ect access to the Bridge Setup and TR Port Setup screens. 1 Log on to the Switch 2000 TR. The Main Menu appears. See Figure 4-2. Figure 4-2 Main Menu with Quick Setup Highlighted 2 From the Main Menu, select Quick Setup.
Bridge Configuration 4-3 Bridge Configuration The bridge configuration section includes information on the following: ■ Source Routing T ransparent (SRT) ■ Source Route (SR) ■ T ransparent (TP) ■ Spanning T ree Fields Setting Source Routing T ransparent (VT100) NOTE: This bridge setting requires that you reset the switch.
4-4 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE 13 At the bottom of the TR Port Setup screen, select BRIDGE. The Port Bridge Setup screen appears. See Figure 4-6. Figure 4-6 Port Bridge Setup Scr een 14 In the Attached LAN ID field, enter the LAN ID in hex.
Bridge Configuration 4-5 5 In the Spanning T ree field, select *802.1d* to enable 802.1d compliant Spanning T ree for the Switch 2000 TR. The BPDU value is automatically assigned: 80-01-43-00-00-00. 6 Select OK. Repeat for all ports as desired. Spanning T ree Fields Spanning T ree is an algorithm designed to eliminate loops in networks.
4-6 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Port Configuration The Port configuration section includes directions for configuring ports of the Switch 2000 TR, including: ■ Admin State .
Port Configuration 4-7 identified by their VLAN ID. All ports are configur ed by default to VLAN 1. 1 Set this field by entering the desired VLAN number for the current port. 2 Press [Return]. Setting Port Personality Ports 1 through 4 on the Switch 2000 TR can be set to *Adapter* or *Hub*.
4-8 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE ring ahead in the queue. The frame that has been buffer ed for the busy or down queue is discarded so that deliverable packets can proceed. ■ Disabled — In the disabled mode, neither Flow Control or Non-blocking ar e in use.
Port Configuration 4-9 T o set a Locally Administered Address, take these steps in the Locally Admin. field: 1 Enter address in hexadecimal. This should be between 400000 000000 and 7FFFFF FFFFFF . 2 Press [OK]. 3 Reset the Switch 2000 TR. NOTE: The Locally Administered address will not be valid until the Switch 2000 TR is reset.
4-10 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Port Bridge Configuration Set the Spanning T ree and Source Routing fields for the Port using the Bridge selection, located at the bottom of the Port Setup screen. Choices ar e: ■ Priority ■ Path Cost ■ Attached LAN ID ■ Max.
I/O Module Configuration 4-11 ■ Forced — Indicates that the port will always accept and propagate STE packets. ■ Auto-Span —Indicates that the port will accept and propagate STE packets when its Spanning T ree state is forwarding. NOTE: Spanning T ree does not have to be enabled for this to function correctly .
4-12 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Setting sysName The sysName field allows you to assign an identifying name to the stack. This name is displayed on the top level form. 1 Enter any combination of up to 30 alpha or numeric characters as an identifier .
VLAN Configuration 4-13 ■ AT M —The port is an A TM OC-3c Module port. For more information, see the SuperStack II Switch A TM OC-3c Module User Guide. ■ VLAN Membership —This field displays the ID of the VLAN(s) to which the port belongs. ■ Port ID —This field displays the ID of the port currently selected in the listbox.
4-14 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Unit Configuration Unit configuration allows you to view these unit parameters: ■ Unit ID ■ Unit Name ■ Port Capacity ■ Option Slot ■ Power Supply For more information on the unit, r efer to “Unit Sta- tistics in Chapter 6.
Administrative Configuration 4-15 Power On Self T est Use this field to specify the type of self-test to run at start-up: ■ Normal —A 10 second test that verifies the Switch 2000 TR’ s basic functions. ■ Extended —A more compr ehensive test that lasts up to 300 seconds.
4-16 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE ■ EDIT USER — Allows you to change your password and community . Y ou cannot change other pass- words or community strings. 2 Select the menu item you want and see the appropri- ate description and instructions on the following pages.
Administrative Configuration 4-17 3 Select OK when you are finished filling in the fields. Creating New Users Follow these steps to create new users and assign access levels to the Switch 2000 TR. From the TR USER ACCESS LEVELS scr een: 1 Select CREA TE USER.
4-18 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE 2 Scroll using the [Down Arr ow] until you highlight the user you want to delete. Y ou cannot delete default users or the current user (that is, yourself). Figure 4-15 Delete User Scr een 3 Press [Return] to delete user .
About the Switch Database (SDB) 4-19 About the Switch Database (SDB) The Switch 2000 TR supports a database of transpar - ent addresses r eceived on its local ports. Using this information, the Switch 2000 TR determines whether a transparent frame should be forwar ded or filtered.
4-20 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Switch Database Configuration The Switch 2000 TR Unit Database View screen allows you to set up, maintain, and view the data- base. The Switching Database is distributed across the units in a stack.
SNMP T rap Configuration 4-21 ■ REFRESH —Command allows you to refr esh the database and display the latest address entries. ■ INSERT —Command allows you to add an entry to the database. ■ DELETE —Command allows you to remove an entry from the database.
4-22 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Figure 4-19 TR T rap Setup Screen The TR T rap Setup screen has these fields: ■ IP Address —Enter the network addr ess of the remote network management station to which traps are to be sent.
Serial Port Configuration 4-23 minal’ s serial port parameters match those on the Switch 2000 TR. This allows you to continue to access the management facility from the equipment after you change the serial port parameters.
4-24 C HAPTER 4: C ONFIGURING WITH THE VT100 I NTERFACE Initializing the Switch 2000 TR The Switch 2000 TR VT100 interface allows you to initialize the nonvolatile memory on the unit and return to the factory defaults.
5 C ONFIGURING WITH THE LCD C ONSOLE This chapter describes the Switch 2000 TR LCD Con- sole management facilities and provides pr ocedures for configuring and managing the device. This con- sole is accessed from the fr ont panel and provides access to most configuration, management, and monitoring facilities.
5-2 C HAPTER 5: C ONFIGURING WITH THE LCD C ONSOLE Bridge Configuration Bridge settings can be made using the LCD console. If you have made settings using the VT100 interface, those settings will be reflected in the LCD console. Refer to Chapter 3 for more information on navigat- ing the LCD console.
Port Configuration 5-3 Port Configuration Port parameters can also be set from the LCD console on the Switch 2000 TR front panel. If you have made settings using the VT100 interface, those settings will be reflected in the LCD console. Refer to Chapter 3 for more information on navigating the LCD console and the LCD console map.
5-4 C HAPTER 5: C ONFIGURING WITH THE LCD C ONSOLE 4 Press [Down Arr ow] until Port # >Link State appears. 5 Press [Enter]. Link State # >[state] appears.
I/O Module Configuration 5-5 Setting Port Personality Ports 1 through 4 can each be configur ed as either “Hub Port” or “Adapter Port.” The Adapter mode is the default for these ports.
5-6 C HAPTER 5: C ONFIGURING WITH THE LCD C ONSOLE Figure 5-2 I/O Module LCD Menus 1 T o view the next level, press [Enter]. 2 Press the [Down Arr ow] until Switch 2000 TR > Module appears. 3 Press [Enter]. ST A TUS > Module T ype appears. 4 Press [Down Arr ow] to scroll down through the I/O Module menus.
6 M ONITORING THE S WITCH 2000 TR This chapter provides information on viewing the cur - rent operating status of the Switch 2000 TR, display- ing errors using the fault log, and carrying out a remote poll (PING). Regularly viewing statistics allows you to be sure that your network and Switch 2000 TR devices are operat- ing properly .
6-2 C HAPTER 6: M ONITORING THE S WITCH 2000 TR Unit Statistics NOTE: The Unit Statistics screen provides an easy method for viewing per -port performance. It displays port traffic activity for each active port. V alues are refreshed approximately every two seconds.
Port Statistics 6-3 Port Statistics The TR Port Statistics screen pr ovides an easy method for viewing individual port performance. See Figure 6-3. TR Port Statistics pr ovide more detailed information on individual ports. This screen also pr o- vides access to the T raffic Statistics screen.
6-4 C HAPTER 6: M ONITORING THE S WITCH 2000 TR Current Utilization — The per centage of bandwidth usage for the port you are curr ently viewing. This value indicates the general traffic level on the individ- ual port.
Port Statistics 6-5 directed to a br oadcast address or frames received with errors. Broadcasts Received — The number of frames received that have a br oadcast destination address. This number does not include frames with errors. Octets Received — The number of octets received by the port, including the MAC header and CRC.
6-6 C HAPTER 6: M ONITORING THE S WITCH 2000 TR Stack Status The Stack Status screen pr ovides easy access to the vital statistics associated with a stack. Units and their status, the software version curr ently running on each unit and the MAC address of each unit displays.
Status 6-7 Status The Status screen pr ovides read-only information about the Switch 2000 TR. Information provided on this screen is especially useful for tr oubleshooting and monitoring system history . Y ou can view some Status information using the LCD console on the front panel of the Switch 2000 TR.
6-8 C HAPTER 6: M ONITORING THE S WITCH 2000 TR Fault Log The Fault Log displays read-only information about the Switch 2000 TR. The Fault Log updates whenever an abnormal condition occurs. This information is for internal 3Com use only . Y our supplier may ask you to quote the Area and Fault Number if you r eport a problem.
Remote Polling (PING) 6-9 Remote Polling (PING) The Remote Poll screen allows you to send a single frame to a remote device. Use this featur e to verify if a remote device is active and r esponding. It can help locate network problems and is also r eferred to as PING.
6-10 C HAPTER 6: M ONITORING THE S WITCH 2000 TR LCD Status The LCD console located on the front panel of the Switch 2000 TR provides useful har dware, software, and system version information.
7 V IRTUAL LAN S This chapter provides information on Virtual Local Area Networks (VLANs). Definitions, benefits, sample configurations and concepts of VLANs are described here, including: ■ What.
7-2 C HAPTER 7: V IRTUAL LAN S Benefits of VLANs Implementing VLANs on your network has three main advantages: ■ It eases the change and movement of devices on networks.
VLANs and the Switch 2000 TR 7-3 Figure 7-1 The concept of VLANs VLANs and the Switch 2000 TR The Switch 2000 TR supports VLANs which consist of a set of switch ports. Each switch port can only belong to one VLAN at a time, regar dless of the device to which it is attached.
7-4 C HAPTER 7: V IRTUAL LAN S Connecting Common VLANs Between Switch Units In the Switch 2000 TR, you typically connect VLANs to other Switch 2000 TRs and units using backbone ports.
VLANs and the Switch 2000 TR 7-5 Figure 7-2 VLAN configuration with a single Switch 2000 TR unit VLAN 1 VLAN 2 Switch 2000 TR Connection for VLAN 1 Connection for VLAN 2 Router.
7-6 C HAPTER 7: V IRTUAL LAN S.
A S OFTWARE U PGRADE U TILITY The SuperStack II Switch 2000 TR has a back-up Software Upgrade Utility that allows you to: ■ Download a new software image if the opera- tional image has been damaged. This feature should be used for emergency situations only! ■ Download a new software image for new r evi- sions.
A-2 A PPENDIX A: S OFTWARE U PGRADE U TILITY L Lists the current settings of the Switch 2000 TR and pro- vides a status report for the previous download attempts. Use this command to check that you hav e entered all the parameters necessary for a successful download.
Using the Commands A-3 Using the Commands The following sections tell you how to use the Soft- ware Upgrade Utility scr een. If you enter the Software Upgrade Utility acciden- tally , enter the command G to quit. If you give no keyboard input for 30 seconds, the utility will time out.
A-4 A PPENDIX A: S OFTWARE U PGRADE U TILITY Status Messages The Software Upgrade utility r eports the status of the last download attempt. It reports err or messages if the download was unsuccessful. The status messages are described below: Messages 1 through 7 are standard TFTP errors as detailed in IFC 783.
B S CREEN A CCESS R IGHTS The table in this appendix specifies which level of users can view and usually edit (write). Access rights allow users to view and/or edit the Switch 2000 TR VT100 management screens. All access rights are r ead-and-write except where noted as read-only .
B-2 A PPENDIX B: S CREEN A CCESS R IGHTS Status Monitor Manager Security Fault Log Monitor Manager Security Setup Monitor read-only Manager Security Serial Port Setup Monitor read-only Manager Security T rap Setup Monitor read-only Manager Security Software Upgrade Security Initialize Security Reset Manager Security Screen Accessible to .
C S ERIAL P ORT C ABLE P IN - OUTS Null Modem Cable 9 pin to RS-232 25 pin. Pin numbers that are under - lined are dif ferent. All other pin designations are straight through.
C-2 A PPENDIX C: S ERIAL P ORT C ABLE P IN - OUTS.
D T ROUBLESHOOTING T roubleshooting Procedur es This appendix lists potential problems you might see when managing the Switch 2000 TR and includes suggested actions to take. If you experience a problem not listed her e or that you cannot solve, please contact your local technical support repr esen- tative.
D-2 A PPENDIX D: T ROUBLESHOOTING The SNMP manager or T elnet workstation can no longer access the device: Check that Remote T elnet access or Commu- nity-SNMP access is enabled. Check that the port through which you ar e access- ing the device has not been disabled, see "Port Configuration" in Chapter 4.
E S WITCH 2000 TR T ECHNICAL S PECIFICATIONS Physical Dimensions Height: 2.75 inches (7.0 cm) x Width: 17.25 inches (44cm) x Depth 12 inches (30.5 cm) Weight: 4.
E-2 A PPENDIX E: S WITCH 2000 TR T ECHNICAL S PECIFICATIONS Specifications for Module Options If you have an A TM, FDDI, or TR-in-FE module, see the following manuals for technical specifications: .
F T ECHNICAL S UPPORT 3Com provides easy access to technical support infor - mation 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 World Wide Web site.
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. T o access 3ComBBS using ISDN, use one of the follow.
Support from Y our Network Supplier F-3 3ComForum on CompuServe Online Service 3ComForum contains patches, software, drivers, and technical articles about all 3Com products, as well as a messaging section for peer support. T o use 3ComForum, you need a CompuServe account.
F-4 A PPENDIX F: T ECHNICAL S UPPORT Returning Products for Repair Before you send a pr oduct 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.
1 INDEX Numbers 3Com Bulletin Board Service (3ComBBS) F-1 3Com sales offices F-3 3Com URL F-1 3ComFacts F-2 3ComForum F-3 A Administrative Settings CREA TE NEW USER 4-15 DELETE USERS 4-15 EDIT USER 4.
2 L LCD Console 3-15 LCD Display Buttons description of 1-7 LCD Statistics 6-10 Learning, description of 6-3 Link State viewing LCD Console 5-3 Listening, definition of 6-3 Local Security Community S.
3 Reset Button Reset 3-22 VT100 Reset 3-21 returning products for r epair F-4 RJ-45 Ports, description of 1-6 Roving Analysis, description of 1-3 S Safety Information 2-1 Screen Access Rights B-1 scre.
4 V Virtual LAN T runks. See VL T s VLAN Setup screen 4-12 VLAN Support, description of 1-2 VLANs assigning ports 4-13 Default 4-13, 7-3 extending into an A TM network 7-4 using Non-routable pr otocol.
3Com Corporation L IMITED W ARRANTY The duration of the warranty for the SuperStack II Switch 2000 TR, is n years. H ARDWARE 3Com warrants its hardware products to be free from defects in workmanship .
warranty gives you specific legal rights which may vary depending on local law. 3Com Corporation , 5400 Bayfront Plaza, Santa Clara, CA 95052-8145 (408) 764-5000 8/04/97.
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 TR 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 TR - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso 3Com TR imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul 3Com TR ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il 3Com TR, 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 TR.
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 TR. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo 3Com TR 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.
