3com SuperStack 3 4900 Getting Started Manual

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 4950 (3C17706)

3Com Corporation

5400 Bayfront Plaza

Santa Clara, California

95052-8145

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If you are a United States government agency, then this documentation and the software described herein are

provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private expense.

Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or

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You agree not to remove or deface any portion of any legend provided on any licensed program or

documentation contained in, or delivered to you in conjunction with, this User Guide.

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be registered in other countries.

3Com, the 3Com logo, and SuperStack are registered trademarks of 3Com Corporation.

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CONTENTS

ABOUT THIS GUIDE

Conventions 8

Related Documentation 9

Accessing Online Documentation 9

Product Registration 10

Documentation Comments 10

1 INTRODUCING THE

S

UPERSTACK 3 SWITCH 4900 SERIES

About the Switches 12

Summary of Hardware Features 13

Switch — Front View Detail 14

100/1000BASE-T and 10/100/1000BASE-T Ports 16

1000BASE-SX Ports 16

GBIC Ports 16

LEDs 17

Switch — Rear View Detail 18

Unit Information Label 19

Power Socket 19

Redundant Power System Socket 19

Console Port 20

Expansion Module Slot 20

Default Settings 20

2 INSTALLING THE SWITCH

Package Contents 22

Choosing a Suitable Site 22

Rack-mounting 23

Placing Units On Top of Each Other 24

Creating an XRN Distributed Fabric 24

How To Interconnect Units 25

Rules For Interconnecting Units 25

The Power-up Sequence 26

Powering-up the Switch 26

Checking for Correct Operation of LEDs 26

Connecting a Redundant Power System 27

Choosing the Correct 10/100/1000BASE-T Cables 27

Choosing the Correct Fiber Cables 28

Switch 4950 — GBIC Operation 29

Approved GBIC Transceivers 29

Inserting a GBIC Transceiver 29

3 SETTING UP FOR MANAGEMENT

Setting Up Overview 34

IP Configuration 35

Preparing for Management 36

Manually Configuring IP Information 37

Connecting to a Front Panel Port 37

Connecting to the Console Port 40

Viewing Automatically Configured IP Information 43

Using 3Com Network Supervisor 43

Connecting to the Console Port 44

Methods of Managing a Switch 46

Command Line Interface Management 46

Web Interface Management 47

SNMP Management 47

Setting Up Command Line Interface Management 48

CLI Management via the Console Port 48

CLI Management over the Network 48

Setting Up Web Interface Management 49

Pre-requisites 49

Web Management Over the Network 50

Setting Up SNMP Management 51

Pre-requisites 51

Default Users and Passwords 51

Changing Default Passwords 52

4 PROBLEM SOLVING

Solving Problems Indicated by LEDs 54

Solving Hardware Problems 55

Solving Communication Problems 57

Solving Software Upgrade Problems 58

A SAFETY INFORMATION

Important Safety Information 60

L’information de Sécurité Importante 63

Wichtige Sicherheitsinformationen 66

B PIN-OUTS

Null Modem Cable 69

PC-AT Serial Cable 69

Modem Cable 70

RJ-45 Pin Assignments 70

C TECHNICAL SPECIFICATIONS

D TECHNICAL SUPPORT

Online Technical Services 75

World Wide Web Site 75

3Com Knowledgebase Web Services 75

3Com FTP Site 76

Support from Your Network Supplier 76

Support from 3Com 77

Email Support 77

Telephone Support 77

Returning Products for Repair 79

INDEX

REGULATORY NOTICES

ABOUT THIS GUIDE

This guide provides all the information you need to install and use the

following Switches in their default state:

■ SuperStack

®

3 Switch 4900 (3C17700)

■ SuperStack

®

3 Switch 4900 SX (3C17702)

■ SuperStack

®

3 Switch 4924 (3C17701)

■ SuperStack

®

3 Switch 4950 (3C17706)

This guide is intended for use with all the 4900 Series Switches listed

above. For illustrative purposes all pictures and example screens show the

4900 model, however, all procedures apply to all the other Switches listed

unless otherwise stated.

The guide is intended for use by network administrators who are

responsible for installing and setting up network equipment;

consequently, it assumes a basic working knowledge of LANs (Local Area

Networks).

If the information in the release notes that are shipped with your product

differ from the information in this guide, follow the instructions in the

release notes.

Most user guides and release notes are available in Adobe Acrobat

Reader Portable Document Format (PDF) or HTML on the 3Com

World Wide Web site:

http://www.3com.com/

8 ABOUT THIS GUIDE

Conventions Table 1 and Table 2 list conventions that are used throughout this guide.

Table 1 Notice Icons

Icon Notice Type Description

Information note Information that describes important features or

instructions.

Caution Information that alerts you to potential loss of data or

potential damage to an application, system, or device.

Warning Information that alerts you to potential personal

injury.

Table 2 Text Conventions

Convention Description

Screen displays This typeface represents information as it appears on the

screen.

Syntax The word “syntax” means that you must evaluate the syntax

provided and then supply the appropriate values for the

placeholders that appear in angle brackets. Example:

To change your password, use the following syntax:

system password <password>

In this example, you must supply a password for <password>.

Commands The word “command” means that you must enter the

command exactly as shown and then press Return or Enter.

Commands appear in bold. Example:

To display port information, enter the following command:

bridge port detail

The words “enter”

and “type”

When you see the word “enter” in this guide, you must type

something, and then press Return or Enter. Do not press

Return or Enter when an instruction simply says “type.”

Keyboard key names If you must press two or more keys simultaneously, the key

names are linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

Words in italics Italics are used to:

■ Emphasize a point.

■ Denote a new term at the place where it is defined in the

text.

■ Identify menu names, menu commands, and software

button names. Examples:

From the Help menu, select Contents.

Click OK.

Related Documentation 9

In addition to this guide, each Switch documentation set includes the

following:

■ SuperStack 3 Management Quick Reference Guide

This guide contains:

■ a list of software features supported by each Switch.

■ a summary of the web interface and command line interface

commands for the Switch.

■ Release Notes

These notes provide information about the current software release,

including new features, modifications, and known problems.

■ SuperStack 3 Switch Implementation Guide

This guide contains information on the features supported by your

Switch and how they can be used to optimize your network. It is

supplied in PDF format on the CD-ROM that accompanies the Switch.

■ Management Interface Reference Guide

This guide provides detailed information about the web interface and

command line interface that enable you to manage the Switch. It is

supplied in HTML format on the CD-ROM that accompanies the

Switch.

There are other publications you may find useful:

■ Documentation accompanying the Advanced Redundant Power

System.

■ Documentation accompanying the Expansion Modules.

■ Documentation accompanying 3Com Network Supervisor. This is

supplied on the CD-ROM that accompanies the Switch.

Accessing Online

Documentation

The CD-ROM supplied with your Switch contains the following online

documentation:

■ SuperStack 3 Switch Implementation Guide (PDF format)

■ SuperStack 3 Switch Management Interface Reference Guide (HTML

format)

■ Other documentation relating to the Switch 4900 Series (PDF format)

10 ABOUT THIS GUIDE

To access the 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 screen will be displayed automatically.

2 Select the Documentation section from the contents page.

If the online documentation is to be accessed from a local drive or server,

you will need to access the CD-ROM contents via the root directory and

copy the files from the CD-ROM to a suitable directory.

■ The HTML Reference Guide is stored in the Docs/referenceguide

on the CD-ROM. The documentation is accessed using the index.htm

file.

■ The PDF Implementation Guide is stored in the

Docs/implementation directory of the CD-ROM.

3Com recommends that you copy the Docs/referenceguide

directory as a whole to maintain the structure of the files.

Product

Registration

You can register your SuperStack 3 Switch on the 3Com Web site to

receive up-to-date information on your product:

http://support.3com.com/registration/frontpg.pl

Documentation

Comments

Your suggestions are very important to us. They will help make our

documentation more useful to you. Please e-mail comments about this

document to 3Com at:

[email protected]

Please include the following information when commenting:

■ Document title

■ Document part number (on the title page)

■ Page number (if appropriate)

Example:

Part Number DUA1770-0AAA0x

SuperStack 3 Switch 4900 Series Getting Started Guide

Page 21

1

INTRODUCING THE

S

UPERSTACK 3 SWITCH 4900 SERIES

This chapter contains 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 hardware.

The information for all the Switches in the Switch 4900 Series is the same

unless otherwise stated.

■ About the Switches

■ Summary of Hardware Features

■ Switch — Front View Detail

■ 100/1000BASE-T and 10/100/1000BASE-T Ports

■ 1000BASE-SX Ports

■ GBIC Ports

■ LEDs

■ Switch — Rear View Detail

■ Unit Information Label

■ Power Socket

■ Redundant Power System Socket

■ Console Port

■ Expansion Module Slot

■ Default Settings

12 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

About the Switches ■ The Switch 4900 connects your existing 100 Mbps devices and

high-performance workgroups with a 1000 Mbps copper backbone or

server connection.

■ The Switch 4900 SX connects your existing 1000 Mbps devices and

high-performance workgroups with a 1000BASE-SX fiber backbone or

server connection.

■ The Switch 4924 connects your existing 10 Mbps and 100 Mbps

devices and high-performance workgroups to a 1000 Mbps copper

backbone or server connection.

■ The Switch 4950 is a 10/100/1000 Mbps mixed media device that

allows you to connect your existing 10/100/1000 Mbps devices and

high-performance workgroups to a fiber or copper gigabit backbone

or server connection.

You can also interconnect any combination of two Switches from the

SuperStack

®

4900 Series or 3Com Switch 4050/4060 range to create an

XRN Distributed Fabric. This allows you to create a highly resilient core

around which you can build your network. For more information about

interconnecting Switches, see “Creating an XRN Distributed Fabric”

on

page 24

. For more information about 3Com XRN Technology and how to

use it in your network, refer to the Implementation Guide on the

CD-ROM that accompanies the Switch.

For information about using the software features of the Switch, refer to

the “SuperStack 3 Switch Management Interface Reference Guide” on

the CD-ROM that accompanies the Switch.

About the Switches 13

Summary of

Hardware Features

Table 3 summarizes the hardware features that are supported by the

Switches.

Table 3 Hardware features

Feature Switch 4900 Series

Fast Ethernet

and Gigabit

Ethernet Ports

Switch 4900: 12 Auto-negotiating 100BASE-TX/1000BASE-T

ports

Switch 4900 SX: 12 Auto-negotiating 1000BASE-SX ports

Switch 4924: 24 Auto-negotiating

10BASE-T/100BASE-TX/1000BASE-T ports

Switch 4950: 12 Auto-negotiating

10BASE-T/100BASE-TX/1000BASE-T, 6 1000BASE-SX and

6 GBIC ports

Addresses ■ Up to 12,000 supported

■ Up to 64 permanent entries

Forwarding

Modes

Store and Forward

Duplex Modes ■ Half duplex only supported on

10BASE-T/100BASE-TX/1000BASE-T ports in 10/100 Mbps

mode

■ All 1000 Mbps ports are full duplex only

Flow Control Supported on all ports

Smart

auto-sensing

■ Supported on all 10BASE-T/100BASE-TX/1000BASE-T ports

■ Not supported on 1000BASE-SX and GBIC ports

Traffic

Prioritization

Supported (IEEE Std 802.1D, 1998 Edition)

Four traffic queues per port

Layer 3

Switching

Support for wire-speed IP routing

RPS Support Connects to SuperStack 3 Advanced Redundant Power System

(ARPS) (3C16071B)

XRN Support eXpandable Resilient Networking (XRN) support. Allows

interconnection of two units to create a Distributed Fabric.

Mounting 19-inch rack or stand-alone mounting

14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

Switch — Front

View Detail

Figure 1 Switch 4900 — front view

Figure 2 Switch 4900 SX — front view

Switch — Front View Detail 15

Figure 3 Switch 4924 — front view

Figure 4 Switch 4950 — front view

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot

be used as standard traditional telephone sockets, or to connect the unit to a

traditional PBX or public telephone network. Only connect RJ-45 data

connectors, network telephony systems, or network telephones to these

sockets.

Either shielded or unshielded data cables with shielded or unshielded

jacks can be connected to these data sockets.

16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

100/1000BASE-T and

10/100/1000BASE-T

Ports

The 100BASE-TX/1000BASE-T and 10BASE-T/100BASE-TX/1000BASE-T

ports have RJ-45 connectors and are configured as Auto MDIX

(cross-over).

The default state for these ports is auto-negotiation enabled, where the

speed, duplex and flow control modes of a link are automatically

detected to provide the highest available bandwidth with the link partner.

Alternatively, auto-negotiation can be disabled. These ports can be

manually configured to 10 Mbps half duplex (if supported), 100 Mbps

half duplex, 10 Mbps full duplex (if supported), or 100 Mbps full duplex.

It is not possible to manually configure a 1000BASE-T link as

auto-negotiation is mandatory in the 1000BASE-T standard.

The maximum segment length is 100 m (328 ft) over Category 5 twisted

pair cable.

1000BASE-T operation only supports full-duplex mode.

10BASE-T (10 Mbps) is only supported on Switch 4924 and 4950.

1000BASE-SX Ports The default state for these ports is auto-negotiation enabled, where the

speed, duplex and flow control modes are negotiated. As the speed and

duplex modes are fixed by the media type, only the flow control is

negotiated with the link partner. Alternatively, auto-negotiation can be

disabled and the flow control setting can be manually configured.

1000BASE-SX ports do not support auto-negotiation of speed and only

support full duplex mode.

GBIC Ports GBIC ports support fiber Gigabit Ethernet short-wave (SX), long-wave

(LX) and long-haul (LH70) GBIC transceivers in any combination. This

offers you the flexibility of using GBIC transceivers to provide connectivity

between the Switch and remote 1000 Mbps workgroups or to create a

high capacity aggregated link backbone connection.

The default state for these ports is auto-negotiation enabled, where the

speed, duplex and flow control modes are negotiated. As the speed and

duplex modes are fixed by the media type, only the flow control is

negotiated with the link partner. Alternatively, auto-negotiation can be

disabled and the flow control setting can be manually configured.

Switch — Front View Detail 17

LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their

status according to color. For information on using the LEDs for problem

solving, see “Checking for Correct Operation of LEDs”

on page 26.

Table 4 LED behavior

LED Color Indicates

Port Status LEDs

Packet Yellow Packets are being transmitted/received on the port.

Off No packets are being transmitted/received on the port.

Status Green A high speed (1000 Mbps) link is present, and the port

is enabled.

Green flashing A high speed (1000 Mbps) link is present, but the port

is disabled.

Yellow A low speed (100 Mbps on 4900, 10/100 Mbps on

4924/4950) link is present, and the port is enabled.

(Not applicable on 4900 SX.)

Yellow flashing A low speed (100 Mbps on 4900, 10/100 Mbps on

4924/4950) link is present, but the port is disabled.

(Not applicable on 4900 SX.)

Off No link is present.

Module Status LEDs

Green The Module is installed and supported. The Link Status

has been determined for a single port Module.

Yellow The Module is installed and supported. The Module

has multi-ports or there is no Link for a single port

Module.

Yellow flashing The Module is installed but not supported. Note that

the Switch will continue to operate normally.

Off The Module is not installed.

Unit LEDs

1–4 Green Determines the identity of the Switch when

interconnected to another Switch to create an XRN

Distributed Fabric and that a link is present.

Off A fault has occurred.

Power/Self Test LED

Green The Switch is powered-up and operating normally.

Green flashing The Switch is either downloading software or is

initializing (which includes running a Power On Self

Test).

Yellow The Switch has failed its Power On Self Test.

Off The Switch is not receiving power.

18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

Switch — Rear

View Detail

Figure 5 Switch 4900 — rear view

Figure 6 Switch 4900 SX — rear view

Layer 3 LED

Green The Switch software supports Layer 3.

Off The Switch software does not support Layer 3.

LED Color Indicates

Switch — Rear View Detail 19

Figure 7 Switch 4924 — rear view

Figure 8 Switch 4950 — rear view

Unit Information

Label

This label shows the following:

■ The 3Com product name of the Switch

■ The 3Com 3C number of the Switch

■ The unique MAC address (Ethernet address) of the Switch

■ The serial number of the Switch

You may need this information for fault reporting purposes.

Power Socket The Switch automatically adjusts its power setting to any supply voltage

in the range 90-240 VAC.

Redundant Power

System Socket

To protect against internal power supply failure, you can use this socket

to connect a SuperStack 3 Advanced Redundant Power System (RPS) to

the Switch. See “Connecting a Redundant Power System”

on page 27.

20 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

Console Port The console port allows you to connect a terminal and perform remote or

local out-of-band management. The console port uses a standard null

modem cable and is set to auto-baud (up to a maximum of 19200 baud),

8 data bits, no parity and 1 stop bit.

Expansion Module

Slot

You can use this slot to install an Expansion Module. Contact your

supplier for further information on the range of Expansion Modules

supported by your Switch.

WARNING:

When an Expansion Module is not installed, ensure the

blanking plate is fitted by tightening all screws with a suitable tool.

Default Settings Table 5 shows the default settings for the Switches. If you initialize one of

the Switch units, it is returned to these defaults.

Table 5 Default Setting

Feature Switch 4900 Series

Port Status Enabled

Port Speed Auto-negotiated

Duplex Mode Auto-negotiated

Flow Control Auto-negotiated

Broadcast Storm Control Enabled

High threshold: 3000 broadcast frames per

second — Notify and filter

Low threshold: 1500 broadcast frames per

second — Notify and unfilter

Virtual LANs (VLANs) All ports belong to the untagged Default VLAN

(VLAN 1)

Multicast Filtering IGMP filtering enabled

Rapid Spanning Tree Protocol Enabled

Link Aggregation Control

Protocol (LACP)

Enabled

Smart Auto-sensing Switch 4900, 4924, and 4950: Enabled

Switch 4900 SX: Not applicable

IP Address 169.254.100.100

*

* This default IP address is used if the unit is operating in standalone mode, and/or no other

Switches on the network have this IP address. If this default IP address is already in use then the

Switch detects this and configures itself with an IP address in the range 169.254.1.0 to

169.254.254.255.

Subnet Mask 255.255.0.0

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3com SuperStack 3 4900 Getting Started Manual

3com SuperStack 3 4900 Getting Started Manual

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