3COM 4226T, 4250T, 4228G User Manual

SuperStack® 3

Switch 4200 Family
Getting Started Guide

Switch 4226T (3C17300)
Switch 4250T (3C17302)
Switch 4228G (3C17304)

http://www.3com.com/

Part No. DUA1730-0AAA04
Published July 2005

3Com Corporation
350 Campus Drive
Marlborough, MA
01752-3064

Copyright © 2002, 2005 3Com Corporation. All rights reserved. No part of this documentation may be
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without written permission from 3Com Technologies.

3Com Technologies reserves the right to revise this documentation and to make changes in content from time
to time without obligation on the part of 3Com Technologies to provide notification of such revision or
change.

3Com Technologies provides this documentation without warranty, term, or condition of any kind, either
implied or expressed, including, but not limited to, the implied warranties, terms or conditions of
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changes in the product(s) and/or the program(s) described in this documentation at any time.

If there is any software on removable media described in this documentation, it is furnished under a license
agreement included with the product as a separate document, in the hard copy documentation, or on the
removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy,
please contact 3Com and a copy will be provided to you.

UNITED STATES GOVERNMENT LEGEND

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
as a “commercial item” as defined in FAR
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights
only as provided in DFAR 252.227-7015 (Nov
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.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not
be registered in other countries.

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

Novell and NetWare are registered trademarks of Novell Incorporated.

Adobe and Acrobat are registered trademarks of Adobe Systems Incorporated.

All other company and product names may be trademarks of the respective companies with which they are
associated.

2.101(a) and as such is provided with only such rights as are

1995) or FAR 52.227-14 (June 1987), whichever is applicable.

Environmental Statement

It is a 3Com policy to be environmentally friendly in all operations. This manual is printed on paper that comes
from sustainable, managed European forests. The production process for making the pulp has a reduced AOX
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The paper is fully biodegradable and recyclable.

CONTENTS

ABOUT THIS GUIDE

Conventions 8
Related Documentation 9

Accessing Online Documentation 10

1 INTRODUCING THE

SUPERSTACK 3 SWITCH 4200 FAMILY

About the Switch 4200 Family 12

Summary of Hardware Features 12

Switch 4200 Family — Front View Detail 13

10BASE-T/ 100BASE-TX Ports 14
10/100/1000BASE-T Ports 14
GBIC Ports 14
LEDs 15

Switch 4200 Family — Rear View Detail 17

Power Socket 17
Redundant Power System Socket 17
Console Port 17

Default Settings 18

2 INSTALLING THE SWITCH

Package Contents 20
Choosing a Suitable Site 20
Rack-mounting 21
Placing Units On Top of Each Other 23
Stacking Units 23
The Power-up Sequence 24

Powering-up the Switch 4200 Family 24
Checking for Correct Operation of LEDs 24
Connecting a Redundant Power System 25

Choosing the Correct Cables 25
Choosing the correct Fiber cables 26

GBIC Operation 27

Approved GBIC Transceivers 27
Inserting a GBIC Transceiver 27

3 SETTING UP FOR MANAGEMENT

Setting Up Overview 32

IP Configuration 33
Preparing for Management 34

Manually Configuring IP Information 35

Connecting to a Front Panel Port 35
Connecting to the Console Port 38

Viewing Automatically Configured IP Information 42

Using 3Com Network Supervisor 42
Connecting to the Console Port 42

Methods of Managing a Switch 45

Command Line Interface Management 45
Web Interface Management 46
SNMP Management 46

Setting Up Command Line Interface Management 47

CLI Management via the Console Port 47
CLI Management over the Network 47

Setting Up Web Interface Management 48

Pre-requisites 48
Web Management Over the Network 49

Setting Up SNMP Management 49

Pre-requisites 50

Default Users and Passwords 50

Changing Default Passwords 50

4 PROBLEM SOLVING

Solving Problems Indicated by LEDs 54
Solving Hardware Problems 55
Solving Communication Problems 55
Solving Stack Formation Problems 56
Solving Software Upgrade Problems 57

A SAFETY INFORMATION

Important Safety Information 60
L’information de Sécurité Importante 62
Wichtige Sicherheitsinformationen 64

B PIN-OUTS

Null Modem Cable 67
PC-AT Serial Cable 67
Modem Cable 68
RJ-45 Pin Assignments 68

C TECHNICAL SPECIFICATIONS

Switch 4226T
(3C17300) 71

Switch 4250T
(3C17302) 73

Switch 4228G
(3C17304) 74

D OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product 75
Purchase Value-Added Services 75
Troubleshoot Online 76
Access Software Downloads 76
Telephone Technical Support and Repair 76
Contact Us 77

INDEX

REGULATORY NOTICES

ABOUT THIS GUIDE

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

®

SuperStack

3 Switch 4200 in its default state.

This guide is intended for use with the following Switch 4200 Family
models:

■ Switch 4226T (3C17300) — 24 10BASE-T/100BASE-TX ports,

10/100/1000BASE-T ports

2

■ Switch 4250T (3C17302) — 48 10BASE-T/100BASE-TX ports,

10/100/1000BASE-T ports

2

■ Switch 4228G (3C17304) — 24 10BASE-T/100BASE-TX ports,

10/100/1000BASE-T ports and 2 GBIC ports

2

All procedures described in this guide apply to all models except where
stated.

For details on the Switch 4200 26-Port (3C17300A), Switch 4200 50-Port
(3C17302A) and Switch 4200 28-Port (3C17304A), refer to the following
document:

■ SuperStack 3 Switch 4200 Family Getting Started Guide (part number

DUA1730-0AAA03)

available for download from the 3Com Web site, www.3Com.com.

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.

8 ABOUT THIS GUIDE

Most user guides and release notes are available in Adobe Acrobat
Reader Portable Document Format (PDF) or HTML on the 3Com

Wide Web site:

World

http://www.3com.com/

Conventions Ta bl e 1 and Tab l e 2 list conventions that are used throughout this guide.

Ta bl e 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

Warning Information that alerts you to potential personal injury

Ta bl e 2 Text Conventions

potential damage to an application, system, or device

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

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

The words “enter”

“type”

and

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

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>.

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

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.”

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

Press Ctrl+Alt+Del

Table 2 Text Conventions (continued)

Convention Description

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

Related Documentation

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

■ 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.

■ SuperStack 3 Switch Management Quick Reference Guide

This guide contains:

■ a list of the software features supported by the Switch.

■ a summary of the web interface and command line interface

commands for the Switch.

■ SuperStack 3 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.

■ Release Notes

These notes provide information about the current software release,
including new features, modifications, and known problems.

There are other publications you may find useful, such as:

■ Documentation accompanying the Advanced Redundant Power

system.

10 ABOUT THIS GUIDE

■ 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 Management Quick Reference Guide (PDF

format)

■ SuperStack 3 Switch Implementation Guide (PDF format)

■ SuperStack 3 Switch Management Interface Reference Guide (HTML

format)

1 To access the documentation insert the CD-ROM into your 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/reference directory

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

■ The PDF Implementation Guide is stored in the

Docs/implementation directory of the CD-ROM.

3Com recommends that you copy the Docs/reference directory as a
whole to maintain the structure of the files.

1

INTRODUCING THE SUPERSTACK 3 SWITCH 4200 FAMILY

This chapter contains introductory information about the Switch 4200
Family and how it can be used in your network. It covers summaries of
hardware and software features and also the following topics:

■ About the Switch 4200 Family

■ Switch 4200 Family — Front View Detail

■ Switch 4200 Family — Rear View Detail

■ Default Settings

This Getting Started Guide describes the following units in the Switch
4200 Family:

■ Switch 4226T (3C17300)

■ Switch 4250T (3C17302)

■ Switch 4228G (3C17304)

For details on the Switch 26-Port (3C17300A), Switch 50-Port
(3C17302A) and Switch 28-Port (3C17304A), refer to the following
document:

■ SuperStack 3 Switch 4200 Family Getting Started Guide (part number

DUA1730-0AAA03)

available for download from the 3Com Web site, www.3Com.com.

12 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES

About the Switch 4200 Family

Summary of

Hardware Features

The Switch 4200 Family are stackable 10/100/1000 Mbps devices which
consists of:

■ 24 or 48 10BASE-T/100BASE-TX ports

■ 2 10/100/1000BASE-T ports

■ 2 GBIC ports (Switch 4228G only)

The Switch provides high-performance workgroups with a backbone to
server connection. You can also add the Switch 4200 Family to any

®

SuperStack

system as your network grows.

Ta bl e 3 summarizes the hardware features that are supported by the

Switch 4200 Family.

Ta bl e 3 Hardware features

Feature Switch 4200 Family

Addresses ■ Up to 8000 supported

■ Up to 64 permanent entries

Auto-negotiation ■ Supported on all ports

■ Auto MDI/MDI-X

Forwarding Modes Store and Forward

Duplex Modes Half and full duplex on all 10/100 ports. Full duplex

on 1000BASE-T ports and full duplex on GBIC ports

Flow Control In full duplex operation all ports are supported

Smart Auto-sensing Supported on all ports except GBIC ports which are

Traffic Prioritization Supported (IEEE 802.ID): 2 queues per port

Ethernet and Fast Ethernet
Ports

Gigabit Ethernet Auto-negotiating 10/100/1000BASE-T ports

GBIC Auto-negotiating GBIC ports (Switch 4228G only)

RPS Support Connects to SuperStack Advanced Redundant

Mounting 19-inch rack or stand-alone mounting

single speed ports.

Smart auto-sensing allows auto-negotiating ports to
monitor and detect a high error rate on a link, or a
problem in the "physical" interconnection to
another port and react accordingly.

Auto-negotiating 10BASE-T/100BASE-TX ports

Power System (ARPS) (3C16071, 3C16071A or
3C16071B)

About the Switch 4200 Series 13

Switch 4200 Family
— Front View
Detail

10BASE-T / 100BASE-TX

18

16

153

14

13

1

2

3262

1

25

427

6175

4

10BASE-T / 100BASE-TX

6295

28

Figure 1 Switch 4226T (3C17300) — front view

RJ-45 Ports

Unit LEDs

910221123 12 24

8

197

21

20

Power / Self Test LED

Power/

Self Test

25 / Up

1

2
3

4

26 / Down

Alert

Unit

Alert LED

10/100/1000BASE-T

ports

Figure 2 Switch 4250T (3C17302) — front view

RJ-45 Ports

10

9

33

32

8

31730

34

13361235

11

39

37

153814

41

40

16

194218

17

3C17300 Superstack 3Switch 4226T

3C17302 Superstack 3Switch 4250T

43

20

Unit LEDs

47

48

234622452144

24

Power / Self Test LED

Power/
Self Test

1

2

Up

Alert

3

4

Unit

49

Alert LED

10/100/1000BASE-T

ports

Down

50

Figure 3 Switch 4228G (3C17304) — front view

10BASE-T / 100BASE-TX

RJ-45 Ports

Unit LEDs

18

16

153

14

13

1

2

6175

4

197

910221123 12 24

8

20

21

Alert LED

Power / Self Test LED

Power/

Self Test

25 / Up

1

2

Alert

3

Unit

4

26 / Down

27

27

28

10/100/1000BASE-T

ports

3C17304 Superstack 3

28

GBIC ports

Switch 4228G

14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES

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.

10BASE-T/

100BASE-TX Ports

10/100/1000BASE-T

Ports

GBIC Ports This section applies to the SuperStack 3 Switch 4228G only.

The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. Alternatively, you can manually set these ports to
10BASE-T half duplex, 10BASE-T full duplex, 100BASE-TX half duplex or
100BASE-TX full duplex. The maximum segment length is 100

m (328 ft)

over Category 5 twisted pair cable.

The Switch has two auto-negotiating 10/100/1000BASE-T ports
configured as Auto MDIX (cross-over). While auto-negotiation is enabled,
these ports can automatically detect whether they need to operate in
MDI or MDIX mode. These ports provide 10/100/1000

Mbps full duplex
connections to other Gigabit Ethernet devices. Full duplex allows packets
to be transmitted and received simultaneously which, in effect, doubles
the potential throughput of a link. These ports require either
straight-through or cross-over Category
both ends. The maximum UTP cable length is 100 m (328

5 cables with RJ-45 connectors at

ft) over

Category 5 cable.

The 10/100/1000BASE-T ports will auto-negotiate to the appropriate
speed.

The two GBIC ports support Category 5 twisted pair cable and 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.

About the Switch 4200 Series 15

Fiber GBIC's.

The default state for these ports is auto-negotiation enabled, where
speed, duplex and flow control modes are negotiated. Because 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-T GBIC's

These ports will auto-negotiate to 1000BASE-T, full duplex only. Although
it is not possible to disable auto-negotiation it is possible to change the
advertised capabilities for flow control support, effectively enabling or
disabling flow control.

LEDs Ta bl e 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

“Solving Problems Indicated by LEDs” on page 54.

It is not possible to determine the duplex mode from the LEDs. For more
detailed information, refer to the “SuperStack 3 Switch Management
Interface Reference Guide” on the CD-ROM that is supplied with the
Switch.

Ta bl e 4 LED behavior

LED Color Indicates

Port Status LEDs 10BASE-T/100BASE-TX ports

Green A 100 Mbps link is present and the port is enabled.

Green flashing Packets are being transmitted/received on the port.

Yellow A 10 Mbps link is present and the port is enabled.

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

Green / Yellow
alternating

Off No link is present.

Port Status LEDs GBIC ports

Green A 1000 Mbps link is present and the port is enabled.

Green flashing Packets are being transmitted/received on the port.

Port Status LEDs 10/100/1000BASE-T ports

Green A 1000 Mbps link is present and the port is enabled.

(continued)

A 10 or 100 Mbps link is present, but the port is disabled.

16 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES

LED Color Indicates

Green flashing Packets are being transmitted/received on the port.

Yellow A 10 or 100 Mbps link is present and the port is enabled.

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

Green / Yellow
alternating

Off No link is present.

Unit LEDs

1–4 Green When the Switch forms a stack with other Switch 4200

Off The Switch initialization process is not complete.

Power/Self Test LED

Green The Switch is powered-up and operating normally.

Green flashing The Switch is either downloading software or is initializing

Yellow The Switch has failed its Power On Self Test.

Off The Switch is not receiving power or there is a fault with the

Alert LED

Green flashing The Switch Alert LED has been configured via the CLI or Web

Off The Switch Alert LED has been configured via the CLI or Web

A 10, 100 or 1000 Mbps link present but disabled.

Family units the LED indicates the position of the unit in the
stack and that a link is present. Unit LED number 1 can also
indicate a stand-alone Switch.

(which includes running a Power On Self Test).

Refer to Chapter 4 Solving Problems Indicated by LEDs.

Power Supply Unit.

Interface to flash.

Interface to be off (Default state).

About the Switch 4200 Series 17

Switch 4200 Family
— Rear View Detail

Power Socket

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

Redundant Power

System Socket

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

Figure 4 Switch 4200 Family — rear view

Supply Data Warning Label

Console

(max) 19200,8,1,N

Redundant Power System Socket

Console Port

in the range 90-240 VAC.

To protect against internal power supply failure, you can use this socket
to connect a Switch 4200 to a SuperStack Advanced Redundant Power
System (RPS). See

“Connecting a Redundant Power System” on page 25.

local out-of-band management. The console port uses a standard null
modem cable and is set to auto-baud, 8 data bits, no parity and 1 stop
bit.

18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4200 SERIES

Default Settings Ta b le 5 shows the default settings for the Switch 4200 Family:

Ta bl e 5 Default Settings

Feature Switch 4200 Family

Automatic IP Configuration Enabled

Port Status Enabled

Port Speed All ports are auto-negotiated

Duplex Mode All ports are auto-negotiated

Flow Control ■ Enabled in half duplex

■ Auto-negotiated in full duplex

Broadcast Storm Control Enabled

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

IP Multicast Filtering Filtering enabled

Rapid Spanning Tree Protocol

Fast Start:

RMON Alarm Enabled

Smart Auto-Sensing Enabled

LACP (10/100/1000BASE-T ports and GBIC ports only)

Quality of Service (QoS) All ports prioritize NBX VoIP IP.

1) with 802.1Q learning operational

(VLAN

Enabled

Enabled on all ports

Enabled

All ports set to “best effort” for all other traffic.

If you initialize a Switch unit by selecting System > Control > Initialize in
the Web interface or by entering system control initialize

in

the Command Line Interface, the following settings are retained to allow
you to connect to and manage the Switch:

■ IP Address

■ Subnet Mask

■ Default Router

2

INSTALLING THE SWITCH

This chapter contains the information you need to install and set up the
Switch 4200 Family. It covers the following topics:

■ Package Contents

■ Choosing a Suitable Site

■ Rack-mounting

■ Placing Units On Top of Each Other

■ The Power-up Sequence

■ GBIC Operation

WARNING: Safety Information. Before installing or removing any
components from the Switch 4200 Family or carrying out any
maintenance procedures, you must read the safety information provided

Appendix A of this guide.

in

AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever
tout composant du Switch 4200 ou d'entamer une procédure de
maintenance, lisez les informations relatives à la sécurité qui se trouvent
dans l'Appendice A de ce guide.

VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus
dem Switch 4200 entfernen oder dem Switch 4200 hinzufuegen oder
Instandhaltungsarbeiten verrichten, lesen Sie die Sicherheitsanweisungen,
die in Appendix A (Anhang A) in diesem Handbuch aufgefuehrt sind.

20 CHAPTER 2: INSTALLING THE SWITCH

Package Contents ■ Switch unit

■ CD-ROM

■ Getting Started Guide (this guide)

■ Release Notes

■ Unit Information Labels

■ Warranty Information

■ Power Cord

■ 2 x Mounting brackets

■ 4 x Screws

■ 4 x Rubber feet

Choosing a Suitable Site

The Switch is suited for use on a desktop, either free standing or
mounted in a standard 19-inch equipment rack. Alternatively, the Switch
can be mounted in a wiring closet or equipment room, as an aggregator
for other Hubs and Switches. A rack-mounting kit containing two
mounting brackets is supplied with the Switch.

CAUTION: Ensure that the ventilation holes are not obstructed.

When deciding where to position the Switch, ensure that:

■ Cabling is located away from:

■ sources of electrical noise such as radios, transmitters and

broadband amplifiers.

■ power lines and fluorescent lighting fixtures

■ The Switch is accessible and cables can be connected easily.

■ Water or moisture cannot enter the case of the Switch.

■ Air-flow is not restricted around the Switch or through the vents in the

side of the Switch. 3Com recommends that you provide a minimum of
25mm (1in.) clearance.

■ Air temperature around the Switch does not exceed 40 °C (104 °F).

If the Switch is installed in a 19-inch rack or closed assembly its local air
temperature may be greater than room ambient temperature.

■ The air is as free from dust as possible.

Rack-mounting 21

■ The switch is situated away from sources of conductive (electrical)

dust, for example, laser printers.

■ The unit is installed in a clean, air conditioned environment.

■ The AC supply used by the switch is separate to that used by units

that generate high levels of AC noise, for example, air-conditioning
units and laser printers.

■ No more than eight Switch units are placed on top of one another, if

the units are free-standing.

Rack-mounting The Switch 4200 Family are 1U high and will fit 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 Switch if they
have been fitted.

To rack-mount your Switch:

1 Place the Switch the right way up on a hard flat surface, with the front

facing towards you.

2 Locate a mounting bracket over the mounting holes on one side of the

Switch, as shown in

Figure 5.

22 CHAPTER 2: INSTALLING THE SWITCH

Figure 5 Fitting a bracket for rack-mounting

3 Insert the two screws and tighten with a suitable screwdriver.

You must use the screws supplied with the mounting 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.

5 Insert the Switch into the 19-inch rack and secure with suitable screws

(not provided). Ensure that ventilation holes are not obstructed.

6 Connect network cabling.

7 Finally place a unit information label on the unit in an easily accessible

position. The unit information 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.

Placing Units On Top of Each Other 23

Placing Units On Top of Each Other

If the Switch units are free-standing, up to eight units can be placed one

®

on top of the other. If you are mixing a variety of SuperStack

3 Switch

and Hub units, the smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the
self-adhesive rubber pads supplied. Apply the pads to the underside of
each Switch, sticking one in the marked area at each corner. Place the
Switch units on top of each other, ensuring that the pads of the upper
unit line up with the recesses of the lower unit.

Stacking Units Up to four Switch 4200 Family units can be stacked together and then

treated as a single manageable unit with one IP address. Any
combination of Switch
units are connected together via the 10/100/1000BASE-T ports on the
front of the unit as shown in
the port marked with ‘up’ is connected to the port marked with ‘down’
on the unit above. Cable lengths of between 14

m (328 ft) can be used for stacking.

100

Figure 6 Stacking example

3262

1

25

14

13

1

2

14

13

1

2

14

13

2

1

6295

427

28

18

16

6175

153

4

18

16

6175

153

4

18

16

153

6175

4

4200 Family units is allowed in a single stack. The

Figure 6. Starting from the base of the stack,

cm (5.5 in) and

31730

197

197

197

32

8

8

20

8

20

8

20

9

10

33

34

11

910221123 1224

21

910221123 1224

21

910221123 1224

21

39

13361235

37

1

2
3

4

1

2
3

4

1

2
3

4

40

17

16

153814

Power/

SelfTest

25/ Up

26/ Down

Alert

Unit

Power/

SelfTest

Alert

Unit

Power/

SelfTest

Alert

Unit

27

25/ Up

26/ Down

28

25/ Up

26/ Down

41

27

27

28

27

3C17302ASuperstack 3 Switch4200 50-Port

43

194218

20

3C17304ASuperstack 3 Switch 4200 28-Port

28

3C17304ASuperstack 3 Switch4200 28-Port

28

3C17300ASuperstack 3 Switch4200 26-Port

47

48

234622452144

24

Power/
SelfTest

1

2

Alert

3

4

Unit

Up

49

Down

50

The unit LEDs will display the unit number in the stack, from 1 at the
bottom to 4 at the top.

3Com recommends that when you add a new unit to a stack, you should
first initialize it to factory default settings.

Any Switch 4200 unit can be added to the stack, including the Switch
26-Port (3C17300A), the Switch 50-Port (3C17302A) and the Switch
28-Port (3C17304A). You must install the latest software version on all
units in the stack.

24 CHAPTER 2: INSTALLING THE SWITCH

Stack renumbering occurs when another Switch 4200 Family unit is
added to the bottom of an established stack except when the stack is
already 4 units high. In this instance the ‘down’ port on the bottom unit
of the existing stack will be disabled and its LED will flash green. You will
then not be able to use that port again until the link is lost on that port.

When another Switch 4200 Family unit is added to the top of an
established stack, no stack renumbering occurs. If however the unit being
added takes the stack height above 4 then the ‘up’ port on the top unit
of the existing stack will be disabled and its LED will flash green. You will
then not be able to use that port again until the link is lost on that port.

When removing a Switch from a stack, note the following:

■ Removing a Switch 4200 Family unit from the bottom of an existing

stack will cause the remaining stack to renumber.

■ Removing a Switch 4200 Family unit from the middle of an existing

stack will cause the other Switches in the stack to divide into two
stacks. Units below the unit removed will not renumber, units above
will renumber.

The Power-up Sequence

Powering-up the

Switch 4200 Family

Checking for Correct

Operation of LEDs

■ Removing a Switch 4200 Family unit from the top of an existing stack

will have no effect on the remaining stack.

If you are having problems, refer to “Solving Stack Formation Problems”
on page 56.

The following sections describe how to get your Switch 4200 Family
powered-up and ready for operation.

Use the following sequence of steps to power-up the Switch.

1 Plug the power cord into the power socket at the rear of the Switch.

2 Plug the other end of the power cord into your power outlet.

The Switch powers-up and runs through its Power On Self Test (POST),
which takes approximately 10 seconds.

During the Power On Self Test, all ports on the Switch are disabled and
the LEDs light in a set sequence.

The Power-up Sequence 25

When the POST has completed, check the Power On Self Tes t LE D to
make sure that your Switch is operating correctly.

Ta bl e 6 shows possible

colors for the LED.

Ta bl e 6 Power/Self Test LED colors

Color State

Green The Switch is powered-up and operating normally.

Yellow The Switch has failed its Power On Self Test.

Off The Switch is not receiving power.

In addition, check the Unit LEDs on all Switches in the stack. If a Unit LED
is off, initialization is not complete. 3Com recommends that you do not
use the Switch's management interface until the Unit LED is green.

If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 54.

Connecting a

Redundant Power

System

Choosing the Correct

Cables

You can connect a SuperStack Advanced Redundant Power System
(3C16071, 3C16071A or 3C16071B) to the Switch. This unit, which is
also known as an RPS, is designed to maintain the power to your Switch
if a power supply failure occurs.

For normal redundancy, the unit requires one Type 2A Power Module
(part number 3C16074A). For full redundancy, the unit requires two type
2A Power Modules combined using a Type 2 Y-Cable (part number
3C16078).

CAUTION: The Switch has no ON/OFF switch; the only method of
connecting or disconnecting mains power is by connecting or
disconnecting the power cord.

CAUTION: The Switch can only use a SuperStack Advanced Redundant
Power System output.

All of the ports on the front of the Switch 4200 Family are Auto-MDIX,
that is they have a cross-over capability. The port can automatically detect
whether it needs to operate in MDI or MDIX mode. Therefore you can
make a connection to a port with a straight-through (MDI) or a cross-over
cable (MDIX).

The Auto-MDIX feature only operates when auto-negotiation is enabled.

26 CHAPTER 2: INSTALLING THE SWITCH

If auto-negotiation is disabled, all the Switch ports are configured as
MDIX (cross-over). If you want to make a connection to another MDIX
port, you need a cross-over cable. Many ports on workstations and
servers are configured as MDI (straight-through). If you want to make a
connection to an MDI port, you need to use a standard straight-through
cable. See

3Com recommends that you use Category 5 twisted pair cable — the
maximum segment length for this type of cable is 100 m (328 ft).

CAUTION: If you want to install the Switch using a Category 5E or
Category 6 cable, 3Com recommends that you briefly connect the cable
to a grounded port before connecting network equipment. If you do not,
the cables Electrostatic Discharge (ESD) may damage the Switch's port.

You can create a grounded port by connecting all wires at one end of a
UTP cable to an earth ground point, and the other end to a female RJ-45
connector located, for example, on a Switch rack or patch panel. The
RJ-45 connector is now a grounded port.

Ta bl e 7.

Choosing the correct

Fiber cables

Ta bl e 7 Cables required to connect the Switch 4200 Family to other devices if

auto-negotiation is disabled

Cross-over Cable Straight-through Cable

Switch to Switch
(MDIX to MDIX)

Switch to Hub
(MDIX to MDIX)

Switch to PC (NIC)
(MDIX to MDI)

✓

✓

✕

✕

✕

✓

Choose from the following cable options:

■ The 1000BASE-SX ports can be connected to multimode fiber cables

only.

■ The 1000BASE-LX and LH70 GBIC ports use multimode or

single-mode fiber optic cables.

For detailed information on fiber cable specifications, refer to the
SuperStack 3 Implementation Guide that accompanies your Switch.

GBIC Operation 27

If you wish to connect a 1000BASE-SX MT-RJ port to a fiber port with a
different type of connector, for example, SC or ST please contact your
network supplier for a suitable patch cable.

GBIC Operation The following section describes how to insert a GBIC transceiver into a

GBIC port. This section applies to the SuperStack 3 Switch 4228G only.

GBIC transceivers are hot-insertable and hot-swappable. You can remove
them from and insert them into any GBIC port without having to power
down the Switch.

Approved GBIC

Transceivers

Inserting a GBIC

Transceiver

The 3Com approved GBIC transceivers are:

■ 1000BASE-SX GBIC (3CGBIC91)

■ 1000BASE-LX GBIC (3CGBIC92)

■ 1000BASE-T GBIC (3CGBIC93)

■ 1000BASE-LH70 GBIC (3CGBIC97)

These are correct at the time of publication.

To access the latest list of approved GBIC transceivers for the Switch on
the 3Com Corporation World Wide Web site, enter this URL into your
internet browser:

http://www.3com.com

The URL is case sensitive.

To be recognised as valid, the GBIC transceiver must have the following
characteristics:

■ 1000BASE-SX, 1000BASE-LX, 1000BASE-T or 1000BASE-LH70 media

type:

■ 1000BASE-SX GBIC transceiver

Use this transceiver to connect the Switch directly to a multimode
fiber-optic cable.

■ 1000BASE-T GBIC transceiver

Use this transceiver to connect the Switch directly to Category 5
twisted-pair cable.

28 CHAPTER 2: INSTALLING THE SWITCH

■ 1000BASE-LX GBIC transceiver

■ 1000BASE-LH70 GBIC transceiver

■ Fiber SC connector

■ Type 4 GBIC with internal EEPROM fitted.

If the GBIC transceiver is faulty, it will not operate within the Switch. See

“Solving Hardware Problems” on page 55.

Do not use non-3Com GBICs. If the GBIC transceiver is invalid it will not
be recognised by the Switch.

Use the following sequence of steps to activate the GBIC ports.

Use this transceiver to connect the Switch directly to a single-mode
fiber-optic cable or to multimode fiber using a conditioned launch
cable.

Use this transceiver to connect the Switch directly to a single-mode
fiber-optic cable or to multimode fiber using a conditioned launch
cable.

1 To insert one of the transceivers into a GBIC expansion port on the

Switch:

a Orient the transceiver so that the fiber-optic duplex subscriber

connector (SC) is toward you, as shown in

Figure 7.

b Gently slide the transceiver into the GBIC port until it clicks into place.

2 If you wish to remove the transceiver, compress the side tabs and gently

pull the transceiver out of the port.

CAUTION: GBIC transceivers are keyed and can be properly inserted only
one way. If the transceiver does not click when you insert it, remove it,
turn it over, and reinsert it.

GBIC Operation 29

Figure 7 Inserting a GBIC Transceiver

erstack 3 Switch 4228G

GBIC Ports

GBIC

Transceiver

3 The transceiver connects to the network using a duplex SC connector.

Attach a male duplex SC connector on the network cable into the duplex
SC connector on the transceiver.

4 Connect the other end of the cable to a device fitted with an appropriate

Gigabit Ethernet connection.

5 Check the LEDs on the front of the Switch to ensure that it is operating

correctly. Refer to

“LEDs” on page 15 for more information.

30 CHAPTER 2: INSTALLING THE SWITCH

3

SETTING UP FOR MANAGEMENT

Your 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 offered by the Switch, and to change and monitor the way it
works, you have to access the management software that resides on the
Switch. This is known as managing the Switch.

Managing the Switch can help you to improve the efficiency of the
Switch and therefore the overall performance of your network.

This chapter explains the initial set up of the Switch and the different
methods of accessing the management software to manage a Switch. It
covers the following topics:

■ Setting Up Overview

■ Manually Configuring IP Information

■ Viewing Automatically Configured IP Information

■ Methods of Managing a Switch

■ Setting Up Command Line Interface Management

■ Setting Up Web Interface Management

■ Setting Up SNMP Management

■ Default Users and Passwords

32 CHAPTER 3: SETTING UP FOR MANAGEMENT

Setting Up Overview

This section gives an overview of what you need to do to get your Switch
set up and ready for management when it is in its default state. The
whole setup process is summarised in Figure 8

. Detailed procedural steps

are contained in the sections that follow. In brief, you need to:

■ Configure IP information manually for your Switch or view the

automatically configured IP information

■ Prepare for your chosen method of management

Figure 8 Initial Switch Setup and Management Flow diagram

Power up the Switch.

Plug and Play Setup

How do you want to connect to the Switch?

Connect to a front panel

port and use the Web

Initial IP Information Setup

Interface or Command

Line Interface.

Page 33.

Yes

Command Line Interface.

IP information is automatically configured.

Do you want to

configure the IP information?

Connect to the console

port and use the

Page 36.

Page 31.

manually

How do you want to view the automatically

Use 3Com Network

Supervisor (3NS).

Page 40.

No

configured IP information?

Connect to a console

port and use the

Command Line Interface.

Page 40.

How do you want to Manage your Switch? Page 45.

SNMP

Page 47.

Web Interface

Connect over the

network.

Page 47.

Feature Management

Command Line Interface

Connect via the

console port.

Page 45.

Connect over the

network via Telnet.

Page 45.

CAUTION: To protect your Switch from unauthorized access, you must
change all three default passwords as soon as possible, even if you do not
intend to actively manage your Switch. For more information on default
users and changing default passwords, see “Default Users and

Passwords” on page 50.

Setting Up Overview 33

IP Configuration You can use one of the following methods to allocate IP information to

your Switch (essential if you wish to manage your Switch across the
network).

Manual IP Configuration

You can choose to configure the IP information yourself. The Switch
remembers the information that you enter until you change it again or
set the configuration method to Automatic.

You should use the Manual IP configuration method if:

■ you do not have a DHCP or BootP server on your network, or

■ you want to remove the risk of the IP address ever changing, or

■ your DHCP or BootP server does not allow you to allocate static IP

addresses. (Static IP addresses are necessary to ensure that the Switch
is always allocated the same IP information.)

For most installations, 3Com recommends that you configure the Switch
IP information manually. This makes management simpler and more
reliable as it is not dependent on a DHCP or BootP server, and eliminates
the risk of the IP address changing.

If you wish to manually enter IP information for your Switch, work
through the “Manually Configuring IP Information”

section on page 35.

Automatic IP Configuration

By default the Switch tries to configure itself with IP information without
requesting user intervention. It tries to obtain an IP address from a DHCP
or BootP server on the network.

If neither server is found, the Switch will configure itself with its default IP
address 169.254.100.100 if it is operating in a standalone mode, and/or
no other Switches on the network have this IP address. If this default IP
address is already in use on the network then the Switch detects this and
configures itself with an IP address in the range 169.254.1.0 to

169.254.254.255.

This process is known as Auto-IP and is the same mechanism used by
Windows 98 and Windows 2000. IP addresses configured by Auto-IP are
temporary as they cannot be routed but are useful for small networks
which are not connected to other networks, or for initial configuration.

34 CHAPTER 3: SETTING UP FOR MANAGEMENT

However, as soon as a DHCP or BootP server is detected, the Switch will
configure itself with the IP address allocated by that server.

When using automatic IP configuration it is important that the IP address
of the Switch is static, otherwise you will not know what the IP address is
and it will be difficult to manage. Most DHCP and BootP servers allow
static IP addresses to be configured so that you know what IP address will
be allocated to the Switch. Refer to the documentation that accompanies
your DHCP/BootP server.

For a detailed description of how automatic IP configuration operates,
please refer to the Implementation Guide on the CD-ROM that
accompanies your Switch or on the 3Com Web site.

You should use the automatic IP configuration method if:

■ your network uses DHCP or BootP to allocate IP information, or

■ flexibility is needed. If the Switch is re-deployed onto a different

subnet, it will automatically reconfigure itself with an appropriate IP
address, instead of you having to manually reconfigure the Switch.

Preparing for

Management

If you use the automatic IP configuration method, you need to discover
the automatically allocated IP information before you can begin
management. Work through the “Viewing Automatically Configured IP

Information” section on page 42.

Once your Switch’s initial set up is complete you can set up your chosen
management method as described in “Methods of Managing a Switch”
on page 45

.

For detailed information about the specific web interface operations and
command line interface commands and problem solving, refer to the
“SuperStack

3 Switch Management Interface Reference Guide” on the

CD-ROM that is supplied with the Switch or on the 3Com Web site.

Manually Configuring IP Information 35

Manually Configuring IP Information

Connecting to a Front

Panel Port

You can manually configure the Switch IP information in the following
ways:

■ Connecting to a front panel port — Connect a workstation using an

Ethernet cable to a front panel port of the Switch. You can then
manually enter IP information using the web interface or the
command line interface (CLI).

■ Connecting to the console port — Connect a workstation using a

console cable to the console port of the Switch. You can then
manually enter IP information using the command line interface (CLI).

To set up your Switch manually you can make a connection to a front
panel port. You must do this whilst the Switch is offline, that is, before
you connect the Switch to a network.

The procedure described in this section assumes the unit has been
powered up in standalone mode and has the default IP address of

169.254.100.100.

Pre-requisites

■ A workstation running Windows 2000, Windows XP or Windows

Server 2003, Red Hat Linux 9, Solaris 7 or Solaris 9.

■ A Network Interface Card (NIC).

■ A Category 5 twisted pair Ethernet cable with RJ-45 connectors.

■ A suitable Web browser — refer to “Choosing a Browser”on page 48.

■ You need to have the following so that you can manually set up the

Switch with IP information:

■ IP address

■ subnet mask

■ default gateway

36 CHAPTER 3: SETTING UP FOR MANAGEMENT

Connecting the Workstation to the Switch

1 Connect the workstation to a front panel port using an Ethernet cable as

shown in Figure 9

Figure 9 Connecting a workstation to the Switch via a front panel port

To connect the cable:

a Attach an RJ-45 connector at one end of the Ethernet cable to the

Network Interface Card (NIC) in the workstation.

b Connect the RJ-45 connector at the other end of the cable to one of

the front panel ports on the Switch.

Do not interconnect the Switch to any other unconfigured Switch.

.

Configuring the Workstation with IP Information

You need to change the IP address and subnet mask of the workstation
that you have connected to the Switch. Make a note of the existing
settings so you can return to them later. Change the workstation to the
following settings:

■ IP address — 169.254.100.99

■ Subnet mask — 255.255.0.0

Setting Up the Switch with IP Information

You are now ready to manually set up the Switch with IP information. You
can do this using the Web interface or the command line interface (CLI)
via telnet.

Using the Web Interface

1 Power-up the Switch. This takes approximately one minute.

2 Open a suitable Web browser and enter 169.254.100.100 in the

Location Address field. This is the default IP address that is automatically
assigned to an offline unit.

Manually Configuring IP Information 37

If there is no response, wait for one minute then re-enter the default IP
address.

3 At the login and password prompts, enter

admin as your user name and

press Return at the password prompt (default user name and password).
If you have logged on correctly, a set of Getting Started pages are
displayed.

4 The Getting Started pages allow you to enter basic setup information for

the Switch. Select Manual and then enter the IP address, subnet mask,
and default gateway that you want the Switch to use when it is
connected to the network. The final page displays a summary of the
information entered.

The initial set up of your Switch is now complete and the Switch is ready
for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 45.

Using Command Line Interface via Telnet

Accessing the Command Line Interface via Telnet or Windows
HyperTerminal using TCP/IP may not work correctly on some platforms
unless it has been configured to send line feeds with carriage returns.

To set this for telnet enter set crlf when in command mode. To set
this for HyperTerminal click on the Settings tab in the Properties screen,
click on ASCII Setup.. and ensure that Send line ends with line feeds is
checked within the ASCII Sending section. You should not configure
HyperTerminal in this way if you are using a console cable to make a
direct connection to the Switch.

1 To start a Telnet session to the unit, click Start in Microsoft Windows

2000/XP.

a Click Run.

b In the dialogue box that appears type the default IP address of the

unit, that is: Telnet 169.254.100.100

c Click OK.

2 Press Enter to open a login prompt.

If the login prompt does not begin immediately, press Return a few times
until it starts.

3 At the login and password prompts, enter

admin as your user name and

press Return at the password prompt. If you have logged on correctly, the

38 CHAPTER 3: SETTING UP FOR MANAGEMENT

top-level menu of the command line interface is displayed as shown in
the example in Figure 10

Figure 10 Example top-level command line interface menu

Menu options: --------------3Com Superstack 3 Switch 4200---------------

bridge - Administer bridge-wide parameters

gettingStarted - Basic device configuration

logout - Logout of the Command Line Interface

physicalInterface - Administer physical interfaces

protocol - Administer protocols

security - Administer security

system - Administer sytem-level functions

trafficManagement - Administer traffic management

Type ? For help

-------------------------------(1)-----------------------------------

Select menu option:

4 At the Select menu option prompt you can either:

■ enter the protocol ip basicConfig command. At the Enter

configuration method prompt enter manual. The screen

prompts you to enter IP information.

.

Connecting to the

Console Port

or

■ enter the gettingStarted command. At the Enter

configuration method prompt enter manual. The screen

prompts you to enter IP information.

5 Enter the IP address, subnet mask, and gateway IP address for the Switch.

The screen displays a summary of the information entered.

The initial set up of your Switch is now complete and the Switch is ready
for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 45.

To set up your Switch manually you can alternatively make a connection
to the console port (this example describes a local connection to the
console port, rather than a remote one via a modem). You can do this
whilst the Switch is offline, that is, before you connect the Switch to a
network, or whilst the Switch is online, that is, connected to a network.

Manually Configuring IP Information 39

Pre-requisites

■ A workstation with terminal emulation software installed, such as

Microsoft Hyperterminal. This software allows you to communicate
with the Switch via the console port directly, or through a modem.

■ Documentation supplied with the terminal emulation software.

■ A suitable cable:

■ A standard null modem cable — if you are connecting directly to

the console port, or

■ A standard modem cable — if you are connecting to the console

port using a modem.

You can find pin-out diagrams for both cables in Appendix B

■ You need to have the following so that you can manually set up the

on page 67.

Switch with IP information:

■ IP address

■ subnet mask

■ default gateway

Connecting the Workstation to the Switch

1 Connect the workstation to the console port using a standard null

modem cable as shown in Figure 11.

Figure 11 Connecting a workstation to the Switch via the console port

To connect the cable:

a Attach the female connector on the cable to the male connector on

the console port of the Switch.

b Tighten the retaining screws on the cable to prevent 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 workstation.

40 CHAPTER 3: SETTING UP FOR MANAGEMENT

2 Open your terminal emulation software and configure the COM port

settings to which you have connected the cable. The settings should be
set to match the default settings for the Switch, which are:

■ 19,200 baud

■ 8 data bits

■ no parity

■ 1 stop bit

■ no hardware flow control

Refer to the documentation that accompanies the terminal emulation
software for more information.

Setting Up the Switch with IP Information

You are now ready to manually set up the Switch with IP information
using the command line interface.

1 The command line interface login sequence begins as soon as the Switch

detects a connection to its console port.

If the login prompt does not begin immediately, press Return a few times
until it starts.

2 At the login and password prompts, enter

admin as your user name and

press Return at the password prompt. If you have logged on correctly, the
top-level menu of the command line interface is displayed as shown in
the example in Figure 12

.

Manually Configuring IP Information 41

Figure 12 Example top-level command line interface menu

Menu options: --------------3Com Superstack 3 Switch 4200---------------

bridge - Administer bridge-wide parameters

gettingStarted - Basic device configuration

logout - Logout of the Command Line Interface

physicalInterface - Administer physical interfaces

protocol - Administer protocols

security - Administer security

system - Administer sytem-level functions

trafficManagement - Administer traffic management

Type ? For help

-------------------------------(1)-----------------------------------

Select menu option:

3 At the Select menu option prompt you can either:

■ enter the protocol ip basicConfig command. At the Enter

configuration method prompt enter manual. The screen

prompts you to enter IP information.

or

■ enter the gettingStarted command. At the Enter

configuration method prompt enter manual. The screen

prompts you to enter IP information.

4 Enter the IP address, subnet mask, and gateway IP address for the Switch.

The screen displays a summary of the information entered.

The initial set up of your Switch is now complete and the Switch is ready
for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 45.

If you do not intend to use the command line interface via the console
port to manage the Switch, you can disconnect the serial cable and close
the terminal emulator software.

42 CHAPTER 3: SETTING UP FOR MANAGEMENT

Viewing Automatically Configured IP Information

Using 3Com Network

Supervisor

If you allow the Switch to automatically configure its own IP information
you need to discover and view the IP information before you can begin to
manage the Switch. You can discover the IP information in two ways:

■ Using 3Com Network Supervisor — This application will auto-discover

the Switch and display the automatically allocated IP information
assigned to the Switch.

■ Connecting to the Console Port — Connect a workstation using a

console cable to the console port of the Switch. You can then view the
IP information automatically assigned to the Switch using the
command line interface (CLI).

You can use the 3Com Network Supervisor application provided on the
CD-ROM that accompanies your Switch to discover the automatically
allocated IP information.

1 Connect your Switch to the network.

2 Power-up the Switch and wait for two minutes.

3 Launch 3Com Network Supervisor and run the Auto-discovery wizard.

3Com Network Supervisor will auto-discover the new Switch and display
the IP information that has been automatically allocated to the Switch.

Most DHCP and BootP servers allow static IP addresses to be configured
so that you know what IP address the Switch will be given. Refer to the
documentation that accompanies your DHCP or BootP server.

Connecting to the

Console Port

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.

Alternatively, you can view the automatically configured IP information
via the command line interface (CLI) through a connection to the console
port. (This example describes a local connection to the console port,
rather than a remote one via a modem.)

Pre-requisites

■ A workstation with terminal emulation software installed, such as

Microsoft Hyperterminal. This software allows you to communicate
with the Switch via the console port directly, or through a modem.

■ Documentation supplied with the terminal emulation software.

Viewing Automatically Configured IP Information 43

■ A suitable cable:

■ A standard null modem cable — if you are connecting directly to

the console port, or

■ A standard modem cable — if you are connecting to the console

port using a modem.

You can find pin-out diagrams for both cables in Appendix B

■ A Category 5 twisted pair Ethernet cable with RJ-45 connectors to

on page 67.

connect your Switch to the network.

Connecting the Workstation to the Switch

1 Connect the workstation to the console port using a standard null

modem cable as shown in Figure 13

Figure 13 Connecting a workstation to the Switch via the console port

.

To connect the cable:

a Attach the female connector on the cable to the male connector on

the console port of the Switch.

b Tighten the retaining screws on the cable to prevent 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 workstation.

2 Open your terminal emulation software and configure the COM port

settings to which you have connected the cable. The settings should be
set to match the default settings for the Switch, which are:

■ 19,200 baud

■ 8 data bits

■ no parity

■ 1 stop bit

■ no hardware flow control

Refer to the documentation that accompanies the terminal emulation
software for more information.

44 CHAPTER 3: SETTING UP FOR MANAGEMENT

Viewing IP Information via the Console Port

You are now ready to view the automatically allocated IP information
using the command line interface.

1 Connect your Switch to the network using an Ethernet cable. As soon as

a network connection is made the Switch begins the automatic IP
configuration process.

The automatic IP configuration process usually completes within one
minute.

If there is no response from a DHCP server within 30 seconds, the Auto-IP
configuration mechanism attempts to allocate the default IP address

169.254.100.100. If this address is not available, it then allocates an IP
address in the range of 169.254.x.y (where x is in the range 1 to 254, and
y is in the range 0 to 255).

2 The command line interface login sequence begins as soon as the Switch

detects a connection to its console port.

If the login prompt does not begin immediately, press Return a few times
until it starts.

3 At the login and password prompts, enter

admin as your user name and

press Return at the password prompt. If you have logged on correctly, the
top-level menu of the command line interface is displayed as shown in
the example in Figure 14

Figure 14 Example top-level command line interface menu

Menu options: --------------3Com Superstack 3 Switch 4200---------------

bridge - Administer bridge-wide parameters

gettingStarted - Basic device configuration

logout - Logout of the Command Line Interface

physicalInterface - Administer physical interfaces

protocol - Administer protocols

security - Administer security

system - Administer sytem-level functions

trafficManagement - Administer traffic management

Type ? For help

-------------------------------(1)-----------------------------------

Select menu option:

.

4 At the Select menu option prompt enter the protocol ip

interface summary command. At the Select IP interfaces

Methods of Managing a Switch 45

prompt enter all. A summary of the automatically allocated IP
information is displayed. Make a note of the Network IP Address.

The initial set up of your Switch is now complete and the Switch is ready
for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 45.

If you do not intend to use the command line interface via the console
port to manage the Switch, you can disconnect the serial cable and close
the terminal emulator software.

Methods of Managing a Switch

Command Line

Interface

Management

Once you have completed the initial set up of your Switch, you can
decide how you wish to manage the Switch. You can use one of the
following methods:

■ Command line interface management

■ Web interface management

■ SNMP management

Each Switch has a command line interface (CLI) that allows you to
manage the Switch from a workstation, either locally via a console port
connection (see Figure 15

), or remotely over the network (see Figure 16).

46 CHAPTER 3: SETTING UP FOR MANAGEMENT

Figure 15 CLI management via the console port

Figure 16 CLI management over the network

Refer to “Setting Up Command Line Interface Management” on

page 47

.

Web Interface

Management

Each Switch has an internal set of web pages that allow you to manage
the Switch using a Web browser remotely over an IP network (see

Figure 17

Figure 17 Web interface management over the network

).

Workstation

Connect over Network

via web browser

Switch

Refer to “Setting Up Web Interface Management” on page 48.

SNMP Management You can manage a Switch using any network management workstation

running the Simple Network Management Protocol (SNMP) as shown in

Figure 18

. For example, you can use the 3Com Network Supervisor

software that is provided on the CD-ROM that accompanies your Switch.

Setting Up Command Line Interface Management 47

Figure 18 SNMP management over the network

Setting Up Command Line Interface Management

CLI Management via

the Console Port

CLI Management over

the Network

Connect over Network

using SNMP

SNMP Network Management

Workstation

Switch

Refer to “Setting Up SNMP Management” on page 49.

This section describes how you can set up command line interface
management using a local console port connection or over the network.

To manage a Switch using the command line interface via the local
console port connection:

1 Ensure you have connected your workstation to the console port correctly

as described in “Connecting to the Console Port”

on page 38.

2 Your Switch is now ready to continue being managed and/or configured

through the CLI via its console port.

To manage a Switch using the command line interface over a network
using Telnet:

1 Ensure you have already set up the Switch with IP information as

described in “Setting Up Overview”

on page 32.

2 Check that you have the IP protocol correctly installed on your

management workstation. You can check this by trying to browse the
World Wide Web. If you can browse, the IP protocol is installed.

3 Check you can communicate with the Switch by entering a ping

command at the DOS prompt in the following format:

c:\ ping xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If you get an error message, check that your IP information has been
entered correctly and the Switch is powered up.

48 CHAPTER 3: SETTING UP FOR MANAGEMENT

4 To open a Telnet session via the DOS prompt, enter the IP address of the

Switch that you wish to manage in the following format:

>telnet xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If opening a Telnet session via third party software you will need to enter
the IP address in the format suitable for that software.

Setting Up Web Interface Management

Pre-requisites

5 At the login and password prompts, enter

admin as your user name and

press Return at the password prompt (or the password of your choice if
you have already modified the default passwords).

If the login prompt does not display immediately, press Return a few
times until it starts.

6 If you have logged on correctly, the top-level menu of the command line

interface for the Switch you wish to manage is displayed as shown in

Figure 12

on page 41.

This section describes how you can set up web interface management
over the network.

■ Ensure you have already set up the Switch with IP information as

described in “Setting Up Overview”

■ Ensure that the Switch is connected to the network using a Category

on page 32.

5 twisted pair Ethernet cable with RJ-45 connectors.

■ A suitable Web browser.

Choosing a Browser

To display the web interface correctly, use one of the following Web
browser and platform combinations:

Tab le 8 Supported Web Browsers and Platforms

Netscape 7.1

Internet Explorer 5.5
and 6.0

Mozilla 1.0

Windows

2000

Windows XP

Windows

Server 2003

Red Hat

Linux 9

✓ ✓ ✕ ✓ ✓

✓ ✓ ✓ ✕ ✕

✓ ✓ ✕ ✓ ✓

Solaris

2.6

Setting Up SNMP Management 49

For the browser to operate the web interface correctly, JavaScript™ and
Cascading Style Sheets must be enabled on your browser. These features
are enabled on a browser by default. You will only need to enable them if
you have changed your browser settings.

Web Management

Over the Network

Setting Up SNMP Management

To manage a Switch using the web interface over an IP network:

1 Check that you have the IP protocol correctly installed on your

management workstation. You can check this by trying to browse the
World Wide Web. If you can browse, the IP protocol is installed.

2 Check you can communicate with the Switch by entering a ping

command at the DOS prompt in the following format:

c:\ ping xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If you get an error message, check that your IP information has been
entered correctly and the Switch is powered up.

3 Open your web browser and enter the IP address of the Switch that you

wish to manage in the URL locator, for example, in the following format:

http://xxx.xxx.xxx.xxx

4 At the login and password prompts, enter admin as your user name and

press Return at the password prompt (or the password of your choice if
you have already modified the default passwords).

5 Click on the Device View button to display the web management options.

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.

■ The management workstation is connected to the Switch using a port

in VLAN 1 (the Default VLAN). By default, all ports on the Switch are in
VLAN 1.

You can use the 3Com Network Supervisor application that is provided on
the CD-ROM that accompanies your Switch to provide SNMP
management for your Switch. If you use 3Com Network Supervisor it
automatically loads the correct MIBs and necessary files onto your
workstation.

50 CHAPTER 3: SETTING UP FOR MANAGEMENT

Pre-requisites ■ Documentation supplied with the SNMP network management

application software.

To manage your Switch using an SNMP network management
application, you need to specify SNMP community strings for the users
defined on the Switch. You can do this using the command line interface
system management snmp community command — refer to the
command line interface section of the “SuperStack 3 Switch
Management Interface Reference Guide” for more information.

Default Users and Passwords

If you intend to manage the Switch using the web interface or the
command line interface, or to change the default passwords, you need to
log in with a valid user name and password. The Switch has three default
user names, and each user name has a different password and level of
access. These default users are listed in Tab le 9

.

CAUTION: To protect your Switch from unauthorized access, you must
change all three default passwords as soon as possible, even if you do not
intend to actively manage your Switch

Tab le 9 Default Users

User
Name

monitor monitor monitor — the user can view all manageable parameters,

manager manager manager — the user can access and change the

admin (no

Default
Password

password)

Access Level

except special/security features, but cannot change any
manageable parameters.

operational parameters but not special/security features

security — the user can access and change all manageable
parameters

Use the admin default user name (no password) to login and carry out
initial Switch setup.

Changing Default

Passwords

You can change the default passwords using either:

■ The gettingStarted command on the CLI, or

■ The security device user modify command on the CLI, or

Default Users and Passwords 51

■ The Security > Device > User > Modify operation on the web interface.

For more information about default users and passwords, refer to the
“Superstack 3 Switch Management Interface Reference Guide” on the
Switch CD-ROM.

52 CHAPTER 3: SETTING UP FOR MANAGEMENT

4

PROBLEM SOLVING

This chapter helps you to diagnose and solve problems you may have
with the operation of your Switch. There is also an explanation of IP
addressing.

The topics covered are:

■ Solving Problems Indicated by LEDs

■ Solving Hardware Problems

■ Solving Communication Problems

■ Solving Software Upgrade Problems

If you experience a problem that is not listed here, it may be included in
the support section of the SuperStack 3 Switch Management Interface
Reference Guide on the CD-ROM that accompanies your Switch.

For Technical Support information, see Appendix D.

54 CHAPTER 4: PROBLEM SOLVING

Solving Problems Indicated by LEDs

If the LEDs on the Switch indicate a problem, refer to the list of suggested
solutions below.

The Power LED does not light

Check that the power cable is firmly connected to the Switch and to the
supply outlet. If the connection is secure and there is still no power, you
may have a faulty power cord or an internal fault. Firstly, check the power
cord by:

■ testing it in another device

■ connecting a working power cord to the ‘problem’ device

then contact your supplier for advice.

On powering-up, the Power/Self Test LED lights yellow

The Switch unit has failed its Power On Self Test (POST) because of an
internal problem. If a port has failed it’s POST, it’s LED will flash
green/yellow alternately to indicate that the port is disabled. Contact your
supplier for advice.

A link is connected and yet the Status LED for the port does not
light

Check that:

■ The Switch and the device at the other end of the link (or cable) are

connected securely.

■ The devices at both ends of the link are powered-up

■ The quality of cable is satisfactory

■ Auto-negotiation settings are the same at both ends.

Auto-negotiation problems will occur with all ports where
auto-negotiation is disabled and incorrect cables are being used
(cross-over or straight).

Solving Hardware Problems 55

Solving Hardware Problems

Solving Communication Problems

SNMP fan fail trap hardware failure

In the rare event of your Switch unit experiencing an SNMP fan fail trap
hardware failure, refer to the suggested solution below.

1 Power off the unit.

2 Check that the air vents are not obstructed.

3 Power cycle the unit. To do this, remove and reconnect all power supplies.

4 If a further fan fail trap is received, return the unit.

Error message indicating that the GBIC transceiver is invalid

The Switch has identified that the GBIC does not meet the minimum
requirements for the Switch and has disabled the port. To correct this
problem, completely remove the GBIC and replace it with a 3Com
approved GBIC. See

“Approved GBIC Transceivers”on page 27.

Error message indicating that the GBIC transceiver is faulty

To correct this problem, completely remove the GBIC and then reinsert it.
If the problem persists, contact 3Com Technical Support.

If you experience communication problems with the Switch, ensure that:

■ The Switch IP address has been configured as described in Chapter 3

■ If the Switch is separated from your management application by a

router, ensure that the default gateway IP address within the Switch is
the same as the IP address of the router.

■ The Switch’s IP address has been entered correctly in your network

management application (such as 3Com Network Supervisor).

The following is a brief overview of IP addressing, and how to obtain a
registered IP address.

IP Addressing

To be managed correctly, each device on your network (for example a
Switch or Hub) must have a unique IP address. IP addresses have the
format n.n.n.n where n is a decimal number between 0 and 255. An
example IP address is 192.168.100.8.

56 CHAPTER 4: PROBLEM SOLVING

The IP address is split into two parts:

■ The first part (‘192.168.100’ in the example) identifies the network on

■ The second part (‘.8’ in the example) identifies the device within the

The natural subnet mask for this example is 255.255.255.0.

If your network has a connection to the external IP network, that is, you
access the Internet, you must apply for a registered IP address.

How do you obtain a registered IP Address?

The IP registration system ensures that every IP address used is unique; if
you do not have a registered IP address, you may be using an identical
address to someone else and your network will not operate correctly.

InterNIC Registration Services is the organization responsible for
supplying registered IP addresses. The following contact information is
correct at time of publication:

which the device resides

network

Solving Stack Formation Problems

World Wide Web site: http://www.internic.net

If your IP network is internal to your organization only, that is, you do not
access the Internet, you may use any arbitrary IP address as long as it is
not being used by another device on your network. 3Com suggests you
use addresses in the series 192.160.100.X (where X is a number between
1 and 254) with a subnet mask of 255.255.255.0.

These suggested IP addresses are part of a group of IP addresses that
have been set aside specially for use ‘in house’ only.

If you are having problems with correctly forming a stack, first ensure that
Spanning Tree is enabled. If it is enabled, do the following:

1 Power off all units in the stack.

2 Check all the cable connections in the stack.

3 Power on all units in the stack.

Solving Software Upgrade Problems 57

Solving Software Upgrade Problems

You can upgrade the management software of the Switch by using the
System > Control > Software Upgrade operation in the Web Interface, or
the system control softwareUpgrade command in the
command line interface. For details on these options, refer to the
Management Interface Reference Guide supplied in HTML format on the
CD-ROM that accompanies your Switch.

If you have problems with your software upgrade, refer to the Problem
Solving section in the Management Interface Reference Guide.

58 CHAPTER 4: PROBLEM SOLVING

A

SAFETY INFORMATION

You must read the following safety information before carrying out any
installation or removal of components, or any maintenance procedures
on the Switch 4200 Series.

WARNING: Warnings contain directions that you must follow for your
personal safety. Follow all directions carefully.
You must read the following safety information carefully before you
install or remove the unit.

AVERTISSEMENT: Les avertissements présentent des consignes que vous
devez respecter pour garantir votre sécurité personnelle. Vous devez
respecter attentivement toutes les consignes.
Nous vous demandons de lire attentivement les consignes suivantes de
sécurité avant d’installer ou de retirer l’appareil.

VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu
befolgen.
Sie müssen die folgenden Sicherheitsinformationen’ sorgfältig
durchlesen, bevor Sie das Gerät installieren oder ausbauen.

60 APPENDIX A: SAFETY INFORMATION

Important Safety Information

WARNING: Installation and removal of the unit must be carried out by
qualified personnel only.

WARNING: If installing the Switch 4200 Series unit in a stack with
SuperStack II or SuperStack 3 units that are narrower than the 4200
Series, the Switch 4200 Series unit must be installed below the narrower
units.

WARNING: The unit must be earthed (grounded).

WARNING: Connect the unit to an earthed power supply to ensure

compliance with safety standards.

WARNING: Power Cord Set:
This must be approved for the country where it is used:

U.S.A. and
Canada

United
Kingdom only

Europe only: ■ The supply plug must comply with CEE 7/7 (“SCHUKO”).

Denmark ■ The supply plug must comply with section 107-2-D1,

Switzerland ■ The supply plug must comply with SEV/ASE 1011.

■ The cord set must be UL-approved and CSA certified.

■ The minimum specification for the flexible cord is:

No. 18 AWG
Type SV or SJ
3-conductor

■ The cord set must have a rated current capacity of at least

10A.

■ The attachment plug must be an earth-grounding type

with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A,
250V) configuration.

■ The supply plug must comply with BS1363 (3-pin 13 amp)

and be fitted with a 5A fuse which complies with BS1362.

■ The mains cord must be <HAR> or <BASEC> marked and

be of type H03VVF3GO.75 (minimum).

■ The mains cord must be <HAR> or <BASEC> marked and

be of type H03VVF3GO.75 (minimum).

standard DK2-1a or DK2-5a.

WARNING: The appliance coupler (the connector to the unit and not the
wall plug) must have a configuration for mating with an EN60320/IEC320
appliance inlet.

Important Safety Information 61

WARNING: The socket outlet must be near to the unit and easily
accessible. You can only remove power from the unit by disconnecting
the power cord from the outlet.

WARNING: This unit operates under SELV (Safety Extra Low Voltage)
conditions according to IEC 950. The conditions are only maintained if
the equipment to which it is connected also operates under SELV
conditions.

WARNING: France and Peru only:
This unit cannot be powered from IT† supplies. If your supplies are of IT
type, this unit must be powered by 230V (2P+T) via an isolation
transformer ratio 1:1, with the secondary connection point labelled
Neutral, connected directly to earth (ground).

†

Impédance à la terre.

WARNING: U.K. only:
If connecting a modem to the console port of the Switch 4200 Series,
only use a modem which is suitable for connection to the
telecommunications system.

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.

62 APPENDIX A: SAFETY INFORMATION

WARNING: Fiber Optic ports - Optical Safety

Never look at the transmit laser while it is powered-up. Never look
directly at the fiber ports and fiber cable ends when they are
powered-up.

WARNING: Use of controls or adjustments of performance or
procedures other than those specified herein may result in hazardous
laser emissions.

L’information de Sécurité Importante

AVERTISSEMENT: L'installation et la dépose de ce groupe doivent être
confiés à un personnel qualifié.

AVERTISSEMENT: Si vous entassez l'unité Switch avec les unités
SuperStack 3 Hub, l'unité Switch 4200 doit être installée en dessous des
unités Hub plus étroites.

AVERTISSEMENT: Vous devez mettre l’appareil à la terre (à la masse) ce
groupe.

AVERTISSEMENT: Brancher l’unité à une source de courant mise à la
terre pour assurer la conformité aux normes de sécurité.

L’information de Sécurité Importante 63

AVERTISSEMENT: Cordon électrique:
Il doit être agréé ans le pays d'utilisation:

Etats-Unis et
Canada

Danemark ■ La prise mâle d'alimentation doit respecter la section 107-2

Europe ■ La prise secteur doit être conforme aux normes CEE 7/7

Suisse ■ La prise mâle d'alimentation doit respecter la norme SEV/ASE

■ Le cordon doit avoir reçu l'homologation des UL et un

certificat de la CSA

■ Le cordon souple doit respecter, à titre minimum, les

spécifications suivantes :

■ calibre 18 AWG

■ type SV ou SJ

■ à 3 conducteurs

■ Le cordon doit être en mesure d'acheminer un courant

nominal d'au moins 10 A

■ La prise femelle de branchement doit être du type à mise à la

terre (mise à la masse) et respecter la configuration NEMA
5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V)

D1 de la norme DK2 1a ou DK2 5a

(“SCHKO”)

■ LE cordon secteur doit porter la mention <HAR> ou

<BASEC> et doit être de type HO3VVF3GO.75 (minimum).

1011

AVERTISSEMENT: Le coupleur d'appareil (le connecteur du groupe et
non pas la prise murale) doit respecter une configuration qui permet un
branchement sur une entrée d'appareil EN60320/CEI 320.

AVERTISSEMENT: La prise secteur doit se trouver à proximité de
l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil
hors circuit qu'en débranchant son cordon électrique au niveau de cette
prise.

AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement
basse de sécurité qui est conforme à la norme CEI 950. Ces conditions ne
sont maintenues que si l'équipement auquel il est raccordé fonctionne
dans les mêmes conditions.

AVERTISSEMENT: France et Pérou uniquement:
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la
terre. Si vos alimentations sont du type impédance à la terre, ce groupe
doit être alimenté par une tension de 230 V (2 P+T) par le biais d'un
transformateur d'isolement à rapport 1:1, avec un point secondaire de

64 APPENDIX A: SAFETY INFORMATION

connexion portant l'appellation Neutre et avec raccordement direct à la
terre (masse).

AVERTISSEMENT: Points d’accès RJ-45. Ceux-ci sont protégés par des
prises de données. Ils ne peuvent pas être utilisés comme prises de
téléphone conventionnelles standard, ni pour la connection de l’unité à
un réseau téléphonique central privé ou public. Raccorder seulement
connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou
téléphones de réseaux à ces prises.

Il est possible de raccorder des câbles protégés ou non protégés avec des
jacks protégés ou non protégés à ces prises de données.

AVERTISSEMENT: Ports pour fibres optiques – sécurité sur le plan
optique

Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais
directement le port à fibres optiques et les embouts de câbles à fibres
optiques tant qu'ils sont sous tension.

AVERTISSEMENT: L'utilisation de contrôles, de réglages de
performances ou de procédures autres que ceux qui sont spécifiés au sein
du présent document risquent d'entraîner l'exposition à des
rayonnements laser dangereux.

Wichtige Sicherheitsinformationen

VORSICHT: Die Installation und der Ausbau des Geräts darf nur durch
Fachpersonal erfolgen.

VORSICHT: Wenn die Switch 4200 Einheit in einer Stapel mit anderen
SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch 4200
Einheit unter die schmaleren Hub Einheiten eingebaut werden.

VORSICHT: Das Gerät muß geerdet sein.

Wichtige Sicherheitsinformationen 65

VORSICHT: Das Gerät muß an eine geerdete Steckdose angeschlossen
werden, die europäischen Sicherheitsnormen erfüllt.

VORSICHT: Der Anschlußkabelsatz muß mit den Bestimmungen des
Landes übereinstimmen, in dem er verwendet werden soll.

VORSICHT: Der Gerätestecker (der Anschluß an das Gerät, nicht der
Wandsteckdosenstecker) muß eine passende Konfiguration für einen
Geräteeingang gemäß EN60320/IEC320 haben.

VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht
zugänglich sein. Die Stromversorgung des Geräts kann nur durch
Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen
werden.

VORSICHT: Europe

■ Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)

sein und die Aufschrift <HAR> oder <BASEC> tragen.

■ Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”).

VORSICHT: Der Betrieb dieses Geräts erfolgt unter den
SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 950. Diese
Bedingungen sind nur gegeben, wenn auch die an das Gerät
angeschlossenen Geräte unter SELV-Bedingungen betrieben werden.

VORSICHT: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen.
Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für
die Verbindung der Einheit mit einem traditionellem privatem oder
öffentlichem Telefonnetzwerk gebraucht werden. Nur
RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese
Steckdosen anschließen.

Entweder geschützte oder ungeschützte Buchsen dürfen an diese
Datensteckdosen angeschlossen werden.

66 APPENDIX A: SAFETY INFORMATION

VORSICHT: Faseroptikanschlüsse – Optische Sicherheit

Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet
ist. Niemals direkt auf die Faseransnchlüsse und auf die Faserkabelenden
schauen, während diese eingeschaltet sind.

VORSICHT: Die Verwendung von Steuerelementen oder die Anpassung
von Leistungen und Verfahren in anderer als der hierin genannten Weise
kann zu gefährlichen Laseremissionen führen.

PIN-OUTS

B

Null Modem Cable 9-pin to RS-232 25-pin

Switch 4200
Cable connector: 9-pin female

Screen

TxD
RxD
Ground
RTS
CTS

DSR

DCD
DTR

Shell
3
2
5
7
8

6

1
4

PC-AT Serial Cable 9-pin to 9-pin

Switch 4200
Cable connector: 9-pin female

Screen

DTR
TxD
RxD
CTS
Ground

DSR

RTS
DCD

Shell
4
3
2
8
5

6

7
1

PC/Terminal
Cable connector: 25-pin male/female

1
3
2
7
4
20

5

6
8

PC-AT Serial Port
Cable connector: 9-pin female

Shell

1
2
3
4
5

6

7
8

Screen

RxD
TxD
Ground
RTS
DTR

CTS

DSR
DCD

Screen

DCD
RxD
TxD
DTR
Ground

DSR

RTS
CTS

only required if screen

always required

required for handshake

only required if screen

Required for handshake

always required

required for handshake

always required

required for handshake

68 APPENDIX B: PIN-OUTS

Modem Cable 9-pin to RS-232 25-pin

RJ-45 Pin Assignments

Switch 4200
Cable connector: 9-pin female

Screen

TxD
RxD
RTS
CTS
DSR

Ground

DCD
DTR

Shell

3
2
7
8
6

5

1
4

RS-232 Modem Port
Cable connector: 25-pin male

1
2
3
4
5

6

7
8

20

Screen

TxD
RxD
RTS
CTS
DSR

Ground

DCD
DTR

Pin assignments for ports configured as MDI and MDIX are given in

Ta bl e 10 and Tab l e 11.

Ta bl e 10 Pin assignments

Pin Number 10/100 1000

Ports configured as MDI

1 Transmit Data + Bidirectional Data A+

2 Transmit Data - Bidirectional Data A-

3 Receive Data + Bidirectional Data B+

4 Not assigned Bidirectional Data C+

5 Not assigned Bidirectional Data C-

6 Receive Data – Bidirectional Data B-

7 Not assigned Bidirectional Data D+

8 Not assigned Bidirectional Data D-

RJ-45 Pin Assignments 69

Ta bl e 11 Pin assignments

Pin Number 10/100 1000

Ports configured as MDIX

1 Receive Data + Bidirectional Data B+

2 Receive Data - Bidirectional Data B-

3 Transmit Data + Bidirectional Data A+

4 Not assigned Bidirectional Data A-

5 Not assigned Bidirectional Data D+

6 Transmit Data - Bidirectional Data D-

7 Not assigned Bidirectional Data C+

8 Not assigned Bidirectional Data C-

70 APPENDIX B: PIN-OUTS

TECHNICAL SPECIFICATIONS

C

Switch 4226T (3C17300)

Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)

Weight: 2.4 kg (5.3 lbs)

Environmental Requirements

Operating Temperature 0 ° to 40 °C (32 ° to 104 °F)

Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F)

Operating Humidity 10–95% relative humidity, non-condensing

Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.

Operational testing: paras 2.1, 2.2, 2.30 and 2.13).

Safety

Agency Certifications UL 60950, EN60950, CSA 22.2 No. 60950, IEC 60950

EMC

Emissions CISPRR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A,

ICES-003 Class A, AS/NZS 3548 Class A, VCCI Class A, CNS 13438 Class A,

EN61000-3-2, EN61000-3-3

Immunity EN 55024

Heat Dissipation 40 watts maximum (136 Btu/h maximum)

Power Supply

AC Line Frequency 50/60 Hz

Input Voltage 90–240 VAC

Current Rating 2.3 A (amps)(maximum)

(continued)

72 APPENDIX C: TECHNICAL SPECIFICATIONS

Standards Supported SNMP

SNMP protocol (RFC 1157)

MIB-II (RFC 1213)

Bridge MIB (RFC 1493)

RMON MIB II (RFC 2021)

Remote Monitoring MIB (RFC

1757)

MAU MIB (RFC 2239)

Terminal Emulation

Telnet (RFC 854)

Protocols Used for Administration

UDP (RFC 768)

IP (RFC 791)

ICMP (RFC 792)

TCP (RFC 793)

ARP (RFC 826)

TFTP (RFC 783)

DHCP (RFC 2131, RFC 2132, RFC 1534)

BOOTP (RFC 951, RFC 1497)

Switch 4250T (3C17302) 73

Switch 4250T (3C17302)

Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)

Weight: 2.83 kg (6.23 lbs)

Environmental Requirements

Operating Temperature 0 ° to 40 °C (32 ° to 104 °F)

Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F)

Operating Humidity 10–95% relative humidity, non-condensing

Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.

Operational testing: paras 2.1, 2.2, 2.30 and 2.13).

Safety

Agency Certifications UL60950, EN60950, CSA 22.2 No. 60950, IEC 60950

EMC

Emissions CISPR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A,

ICES-003 Class A, AS/NZS 3548 Class A, VCCI Class A, CNS 13438 Class A,

EN61000-3-2, EN61000-3-3

Immunity EN 55024

Heat Dissipation 60 watts maximum (205 Btu/h maximum)

Power Supply

AC Line Frequency 50/60 Hz

Input Voltage 90–240 VAC

Current Rating 2.3 A (amps)(maximum)

Standards Supported SNMP

SNMP protocol (RFC 1157)

MIB-II (RFC 1213)

Bridge MIB (RFC 1493)

RMON MIB II (RFC 2021)

Remote Monitoring MIB (RFC

1757)

MAU MIB (RFC 2239)

Terminal Emulation

Telnet (RFC 854)

Protocols Used for Administration

UDP (RFC 768)

IP (RFC 791)

ICMP (RFC 792)

TCP (RFC 793)

ARP (RFC 826)

TFTP (RFC 783)

DHCP (RFC 2131, RFC 2132, RFC 1534)

BOOTP (RFC 951, RFC 1497)

74 APPENDIX C: TECHNICAL SPECIFICATIONS

Switch 4228G (3C17304)

Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 274 mm (10.8 in.)

Weight: 2.73 kg (6.00 lbs)

Environmental Requirements

Operating Temperature 0 ° to 40 °C (32 ° to 104 °F)

Storage Temperature –40 ° to +70 °C (-40 ° to 158 °F)

Operating Humidity 10–95% relative humidity, non-condensing

Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.

Operational testing: paras 2.1, 2.2, 2.30 and 2.13).

Safety

Agency Certifications UL60950, EN60950, CSA 22.2 No. 60950, IEC 60950

EMC

Emissions CISPR 22 Class A, EN55022 Class A, FCC Part 15 Subpart B Class A,

ICES-003 Class A, AS/NZS 3548 Class A, VCCI Class A, CNS 13438 Class A,

EN61000-3-2, EN61000-3-3

Immunity EN 55024

Heat Dissipation 60 watts maximum (205 Btu/h maximum)

Power Supply

AC Line Frequency 50/60 Hz

Input Voltage 90–240 VAC

Current Rating 2.3 A (amps)(maximum)

Standards Supported SNMP

SNMP protocol (RFC 1157)

MIB-II (RFC 1213)

Bridge MIB (RFC 1493)

RMON MIB II (RFC 2021)

Remote Monitoring MIB (RFC

1757)

MAU MIB (RFC 2239)

Terminal Emulation

Telnet (RFC 854)

Protocols Used for Administration

UDP (RFC 768)

IP (RFC 791)

ICMP (RFC 792)

TCP (RFC 793)

ARP (RFC 826)

TFTP (RFC 783)

DHCP (RFC 2131, RFC 2132, RFC 1534)

BOOTP (RFC 951, RFC 1497)

D

OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product

Purchase Value-Added Services

Warranty and other service benefits start from the date of purchase, so it
is important to register your product quickly to ensure you get full use of
the warranty and other service benefits available to you.

Warranty and other service benefits are enabled through product
registration. Register your product at
3Com eSupport services are based on accounts that you create or have
authorization to access. First time users must apply for a user name and
password that provides access to a number of eSupport features
including Product Registration, Repair Services, and Service Request. If
you have trouble registering your product, please contact 3Com Global
Services for assistance.

To enhance response times or extend warranty benefits, contact 3Com or
your authorized 3Com reseller. Value-added services like 3Com Express
and Guardian
upgrades, onsite assistance or advance hardware replacement.
Experienced engineers are available to manage your installation with
minimal disruption to your network. Expert assessment and
implementation services are offered to fill resource gaps and ensure the
success of your networking projects. More information on 3Com
maintenance and Professional Services is available at

http://www.3com.com/

SM

can include 24x7 telephone technical support, software

http://eSupport.3com.com/.

SM

Contact your authorized 3Com reseller or 3Com for a complete list of the
value-added services available in your area.

76 APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT

Troubleshoot Online

Access Software Downloads

You will find support tools posted on the 3Com web site at

http://www.3com.com/

3Com Knowledgebase helps you troubleshoot 3Com products. This
query-based interactive tool is located at

http://knowledgebase.3com.com and contains thousands of technical

solutions written by 3Com support engineers.

Software Updates are the bug fix / maintenance releases for the version
of software initially purchased with the product. In order to access these
Software Updates you must first register your product on the 3Com web

http://eSupport.3com.com/

site at

First time users will need to apply for a user name and password. A link to
software downloads can be found at
under the Product Support heading at

http://eSupport.3com.com/, or

http://www.3com.com/

Software Upgrades are the feature releases that follow the software
version included with your original product. In order to access upgrades
and related documentation you must first purchase a service contract
from 3Com or your reseller.

Telephone Technical Support and Repair

To enable telephone support and other service benefits, you must first
register your product at

http://eSupport.3com.com/

Warranty and other service benefits start from the date of purchase, so it
is important to register your product quickly to ensure you get full use of
the warranty and other service benefits available to you.

When you contact 3Com for assistance, please have the following
information ready:

■ Product model name, part number, and serial number

■ Proof of purchase, if you have not pre-registered your product

■ A list of system hardware and software, including revision level

■ Diagnostic error messages

■ Details about recent configuration changes, if applicable

Contact Us 77

To send a product directly to 3Com for repair, you must first obtain a
return authorization number (RMA). Products sent to 3Com, without
authorization numbers clearly marked on the outside of the package, will
be returned to the sender unopened, at the sender’s expense. If your
product is registered and under warranty, you can obtain an RMA
number online at

http://eSupport.3com.com/. First time users will

need to apply for a user name and password.

Contact Us 3Com offers telephone, e-mail and internet access to technical support

and repair services. To access these services for your region, use the
appropriate telephone number, URL or e-mail address from the list below.

Telephone numbers are correct at the time of publication. Find a current
directory of contact information posted on the 3Com web site at

http://csoweb4.3com.com/contactus/

Country Telephone Number Country Telephone Number

Asia, Pacific Rim Telephone Technical Support and Repair

Australia
Hong Kong
India

Indonesia
Japan

Malaysia
New Zealand
Pakistan

You can also obtain support in this region using the following e-mail: [e-mail]

Or request a repair authorization number (RMA) by fax using this number: + 65 543 6348

Europe, Middle East, and Africa Telephone Technical Support and Repair

From anywhere in these
regions, call:

From the following countries, you may use the numbers shown:

1 800 678 515
800 933 486
[phone] or
000800 650 1111
001 803 61009
00531 616 439 or
03 3507 5984
1800 801 777
0800 446 398
[phone]

[phone]

Philippines

P. R . o f C h i n a
Singapore
S. Korea
Ta iw a n
Thailand

1235 61 266 2602 or
1800 1 888 9469
800 810 3033
800 6161 463
080 333 3308
00801 611 261
001 800 611 2000

78 APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT

Country Telephone Number Country Telephone Number

Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy

You can also obtain support in this region using the following URL:

http://emea.3com.com/support/email.html

Latin America Telephone Technical Support and Repair

Antigua Barbuda
Argentina Local Number
Argentina
Argentina
Aruba
Bahamas
Barbados
Belize
Bermuda
Bolivia
Brazil Local Number
Brazil
British Virgin Islands
Cayman Islands
Chile
Columbia Local Number
Colombia
Costa Rica
Curacao
Dominica
Dominique
Equador
El Salvador
French Guinea
Grenada

You can also obtain support in this region using the following:

Spanish speakers, enter the URL:

http://lat.3com.com/lat/support/form.html

Portuguese speakers, enter the URL:

http://lat.3com.com/br/support/form.html

English speakers in Latin America should send e-mail to:

[e-mail]

0800 297 468
0800 71429
800 17309
0800 113153
0800 917959
0800 182 1502
06800 12813
1 800 553 117
1800 945 3794
800 879489

AT&T [phone]
54 11 5556 3200
0 810 444 3COM
810 44 32 66
AT&T [phone]
1 800 998 2112
1 800 998 2112
AT&T [phone]
AT&T [phone]
AT&T [phone]
55 11 5643 2700
800 13 266
AT&T [phone]
AT&T [phone]
AT&T [phone]
57 1 592 5000
800 011 3266
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]

Luxembourg
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.

Guadalupe
Guatemala
Guyana
Haiti
Honduras
Jamaica
Mexico Local Number
Mexico
Mexico
Monserrat
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Saba Anquila
St Kitts Neives
St Lucia
St Vincent
Suriname
Trinidad and Tobago
Turks and Caycos
Uruguay - Montevideo
Venezuela
Virgin Islands

800 23625
0800 0227788
800 11376
00800 441-1 357
800 831416
0800 995 014
900 938 919
020 795 482
0800 553 072
0800 096 3266

AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
52 55 52 01 00 04
01 800 849CARE
01 800 849 2273
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]
AT&T [phone]

Contact Us 79

Country Telephone Number Country Telephone Number

US and Canada Telephone Technical Support and Repair

1 800 876 3266

80 APPENDIX D: OBTAINING SUPPORT FOR YOUR PRODUCT

INDEX 81

INDEX

Numbers

10/100/1000BASE-T ports 14
3C number 22

A

access levels of default users 50
automatic setup 42

3Com Network Supervisor 42
console port 42

B

browsers

choosing 48

C

cable

choosing the correct 25
fiber 26
maximum length 14

pin-outs 67
CD-ROM 10
command line interface

management 45
console port 17
conventions

notice icons, About This Guide 8

text, About This Guide 8
cross-over configuration 25

F

factory defaults 18

G

GBIC

ports 14
transceivers 27

GBIC ports 14

H

hardware features 12

I

installing the Switch 19

prerequisites 20

IP addressing

registered 56

IP configuration 33

L

LEDs 15
logging in as a default user 50

M

MAC address of the Switch 22
management

methods 45
preparing for 34
setting up 31, 32

manual setup

console port 38

front panel port 35
MDI configuration 25
MDIX configuration 25

D

default

settings 18
users 50

E

Ethernet address of the Switch 22

P

passwords

of default users 50
pin assignments

modem cable 68

null modem cable 67

RJ45 68

RJ45 1000BASE-T 69

serial cable 67
pin-outs 67
ports

82 INDEX

10/100/1000BASE-T ports 14
console 17

GBIC ports 14
power socket 17
powering-up a Switch 4200 24
problem solving 53

communication problems 55

hardware problems 55

IP addressing 55

LEDs 54

Solving software upgrade problems 57

stack formation problems 56
product name 22

R

rack mounting a Switch 4200 21
Redundant Power System. See RPS
RPS 17

connecting 25

socket 17

S

safety information

English 60

French 62

German 64
serial number of the Switch 22
serial port. See console port
Simple Network Management Protocol. See SNMP
SNMP 49
SNMP management 46

setting up 49
socket

power 17

RPS 17
specifications, system 71
Stacking units 23
straight-through configuration 25
Switch

automatic setup 42
Switch 4200

3C number 22

console port 17

dimensions 71

Ethernet address 22

features 12

installation 19, 20

MAC address 22

power socket 17

powering-up 24

product name 22

rack mounting 21
RPS socket 17
serial number 22
size 71
stacking 23
unit information label 22
weight 71

system specifications 71

T

troubleshooting 53

U

unit information label 22

W

Web browsers

choosing 48

web interface

choosing a browser 48

web interface management 46

setting up 48

REGULATORY NOTICES

FCC STATEMENT 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 equipment is operated in a commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference to radio communications, in which case the user will be required to
correct the interference at their own expense.

INFORMATION TO THE USER If this equipment does cause interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:

■ Reorient the receiving antenna.

■ Relocate the equipment with respect to the receiver.

■ Move the equipment away from the receiver.

■ Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced radio/television technician for additional
suggestions. The user may find the following booklet prepared by the Federal Communications Commission
helpful:

How to Identify and Resolve Radio-TV Interference Problems

This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No.
004-000-00345-4.

In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE

802.3.

CSA STATEMENT This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment

CE STATEMENT (EUROPE) This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as

Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur
du Canada.

amended by European Directive 93/68/EEC.

Warning: This is a class A product. In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.

VCCI STATEMENT