3Com 3C17204, 3C172203 User Manual

SuperStack®3

Switch 4400
Getting Started Guide

3C17203
3C17204

http://www.3com.com/

Part No. DUA1720-3AAA02
Published August 2001

3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145

Copyright © 2001, 3Com Technologies. 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
merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or
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 2.101(a) and as such is provided with only such rights as are
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 1995) or FAR 52.227-14 (June 1987), whichever is applicable.
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 and SuperStack are registered trademarks of 3Com Corporation. The 3Com logo and CoreBuilder are
trademarks of 3Com Corporation.

Intel and Pentium are registered trademarks of Intel Corporation. Microsoft, MS-DOS, Windows, and Windows
NT are registered trademarks of Microsoft Corporation. Novell and NetWare are registered trademarks of
Novell, Inc. UNIX is a registered trademark in the United States and other countries, licensed exclusively
through X/Open Company, Ltd.

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JavaScript is a trademark of Sun Microsystems.

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

ENVIRONMENTAL STATEMENT

It is the policy of 3Com Corporation to be environmentally-friendly in all operations. To uphold our policy, we
are committed to:

Establishing environmental performance standards that comply with national legislation and regulations.

Conserving energy, materials and natural resources in all operations.

Reducing the waste generated by all operations. Ensuring that all waste conforms to recognized environmental
standards. Maximizing the recyclable and reusable content of all products.

Ensuring that all products can be recycled, reused and disposed of safely.

Ensuring that all products are labelled according to recognized environmental standards.

Improving our environmental record on a continual basis.

End of Life Statement

3Com processes allow for the recovery, reclamation and safe disposal of all end-of-life electronic components.

Regulated Materials Statement

3Com products do not contain any hazardous or ozone-depleting material.

Environmental Statement about the Documentation

The documentation for this product is printed on paper that comes from sustainable, managed forests; it is
fully biodegradable and recyclable, and is completely chlorine-free. The varnish is environmentally-friendly, and
the inks are vegetable-based with a low heavy-metal content.

C

ONTENTS

A

BOUTTHISGUIDE

Conventions 8
Related Documentation 9

Accessing Online Documentation 9
Product Registration 10
Documentation Comments 10

I

NTRODUCING THE

1

S

UPERSTACK

About the Switch 4400 12

Summary of Hardware Features 12

Summary of Software Features 13
Switch 4400 — Front View Detail 14

10BASE-T/ 100BASE-TX Ports 15

LEDs 15
Switch 4400 — Rear View Detail 17

Power Socket 17

Redundant Power System Socket 17

Console Port 17

Expansion Module Slots 17
Default Settings 18

3S

WITCH

4400

I

NSTALLING THESWITCH

2

Package Contents 20
Choosing a Suitable Site 20
Rack-mounting 21
Placing Units On Top of Each Other 22
Stacking Units 22
The Power-up Sequence 23

Powering-up the Switch 4400 23

Checking for Correct Operation of LEDs 23
Connecting a Redundant Power System 24
Choosing the Correct Cables 24

ETTINGUPFORMANAGEMENT

3

S

Setting Up Overview 28

IP Configuration 28

Preparing for Management 30
Initial Switch Setup 30
Manual Setup 31

Connecting to a Front Panel Port 31

Connecting to the Console Port 33
Automatic Setup 36

Using 3Com Network Supervisor 36

Connecting to the Console Port 36
Methods of Managing a Switch 39

Command Line Interface Management 39

Web Interface Management 40

SNMP Management 40
Setting Up Command Line Interface Management 41

CLI Management via the Console Port 41

CLI Management over the Network 41
Setting Up Web Interface Management 42

Pre-requisites 42

Web Management Over the Network 42
Setting Up SNMP Management 43

Pre-requisites 43
Default Users and Passwords 44

Changing Default Passwords 44

ROBLEMSOLVING

4

P

Solving Problems Indicated by LEDs 46
Solving Hardware Problems 47
Solving Communication Problems 48

A

AFETYINFORMATION

S

Important Safety Information 52
L’information de Sécurité Importante 53
Wichtige Sicherheitsinformationen 55

B

C

D

OUTS

PIN-

Null Modem Cable 57
PC-AT Serial Cable 57
Modem Cable 58
RJ-45 Pin Assignments 58

ECHNICALSPECIFICATIONS

T

Switch 4400
(24-port) 61

Switch 4400
(48-port) 63

ECHNICALSUPPORT

T

Online Technical Services 65

World Wide Web Site 65
3Com Knowledgebase Web Services 65

3Com FTP Site 66
Support from Your Network Supplier 66
Supportfrom3Com 66
Returning Products for Repair 68

NDEX

I

EGULATORYNOTICES

R

A

BOUT

T

HIS

G

UIDE

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

This guide is intended for use with both Switch 4400 models:

■

3C17203 — 24 10BASE-T/100BASE-TX ports

■

3C17204 — 48 10BASE-T/100BASE-TX ports

All procedures described in this guide apply to both models.

The guide is intended for use by network administrators who are
responsible for installing and setting up network equipment;
consequently, it assumes a basic working knowledge of LANs (Local Area
Networks).

If the information in the release notes that are shipped with your product
differ from the information in this guide, follow the instructions in the
release notes.

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

http://www.3com.com/

®

3 Switch 4400 in its default state.

8 ABOUT THIS GUIDE

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

Ta b l e 1

Notice Icons

Icon Notice Type Description

Information note Information that describes important features or

instructions

Caution Information that alerts you to potential loss of data or

potential damage to an application, system, or device

Warning Information that alerts you to potential personal injury

Ta b l e 2

Text Conventions

Convention Description

Screen displays

This typeface represents information as it appears on the
screen.

Syntax

The word “syntax” means that you must evaluate the syntax
provided and then supply the appropriate values for the
placeholders that appear in angle brackets. Example:

To change your password, use the following syntax:

system password <password>

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

Commands

The word “command” means that you must enter the
command exactly as shown and then press Return or Enter.
Commands appear in bold. Example:

To display port information, enter the following command:

bridge port detail

The words “enter”
and “type”

When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press
Return or Enter when an instruction simply says “type.”

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

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

Press Ctrl+Alt+Del

Words in italics Italics are used to:

Emphasize a point.

■

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

■

text.

Identify menu names, menu commands, and software

■

button names. Examples:

From the Help menu, select Contents.

Click OK.

Related Documentation 9

Related Documentation

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

■

SuperStack3SwitchImplementationGuide

This guide contains information on the features supported by your

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

■

SuperStack 3 Switch Management Quick Reference Guide

This guide contains 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.

Accessing Online

Documentation

■

Documentation accompanying the Expansion Modules.

■

Documentation accompanying 3Com Network Supervisor. This is

supplied on the CD-ROM that accompanies the Switch.

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

■

SuperStack3SwitchImplementationGuide(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.

10 ABOUT THIS GUIDE

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.

Product Registration

Documentation Comments

You can register your SuperStack 3 Switch 4400 on the 3Com Web site:

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

Your suggestions are very important to us. They will help make our
documentation more useful to you. Please e-mail comments about this
document to 3Com at:

[e-mail]

Please include the following information when commenting:

Document title

■

Document part number (on the title page)

■

Page number (if appropriate)

■

Example:
Part Number DUA 1720-3AAA0x
SuperStack 3 Switch 4400 Getting Started Guide
Page 21

1

I

NTRODUCING THE

S

UPERSTACK

This chapter contains introductory information about the Switch 4400
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 4400

■

Switch 4400 — Front View Detail

■

Switch 4400 — Rear View Detail

■

Default Settings

3S

WITCH

4400

12 C

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NTRODUCING THESUPERSTACK3SWITCH

4400

About the Switch 4400

Summary of

Hardware Features

The Switch 4400 is a stackable 10/100 Mbps device and provides
high-performance work groups with a backbone to server connection.
TheSwitch4400allowsCascade,GigabitEthernetorFastEthernetFiber
connections when expansion modules are installed in the expansion slots
on the rear of the unit. You can also add the Switch 4400 to any

®

SuperStack

system as your network grows.

Table 3 summarizes the hardware features that are supported by the
Switch 4400.

Ta b l e 3

Feature Switch 4400

Addresses

Auto-negotiation

Forwarding Modes Store and Forward

Duplex Modes Half and full duplex on all front panel ports

Flow Control In full duplex operation all ports are supported

Smart Auto-sensing Supported on all ports

Traffic Prioritization Supported (IEEE 802.ID): 4 queues per port

Ethernet and Fast Ethernet
Ports

RPS Support Connects to SuperStack 3 Advanced Redundant

Mounting 19-inch rack or stand-alone mounting

Hardware features

Up to 8000 supported

■

Up to 64 permanent entries

■

Supported on all ports

■

Auto MDI/MDI-X

■

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

Power System (ARPS) (3C16071B)

About the Switch 4400 13

Summary of Software

Features

Table 4 summarizes the software features that are supported by the
Switch 4400.

Ta b l e 4

Feature Switch 4400

Automatic IP
Configuration

Resilient Links

Aggregated Links

Broadcast Storm Control

Virtual LANs (VLANs)

Multicast Filtering

Spanning Tree Protocol
(802.1D-1998)

Roving Analysis Port

Rapid Spanning Tree
Protocol (802.1w)

Webcache Support

Quality of Service (QoS)

RMON

Email Notification of
Events

Management

Port Security

Software features

Supported

Supported

Supported stack-wide

Supported

Support for up to 60 VLANs using the IEEE 802.1Q
standard

■

128 Multicast filter groups supported

■

IGMP filtering supported

Supported

Supported

Supported

Supported

Supported

Four groups supported: Statistics, History, Alarms,
Event

Supported

Web interface, command line interface, and SNMP
supported

Disconnect Unauthorized Device (DUD) supported

For information about managing the software features of the Switch,
refer to the “SuperStack 3 Switch Management Interface Reference
Guide” on the CD-ROM that accompanies the Switch.

14 C

HAPTER

1: I

NTRODUCING THESUPERSTACK3SWITCH

4400

Switch 4400 — Front View Detail

Figure 1

Figure 2

Switch 4400 (24-port) — front view

Switch 4400 (48-port) — front view

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot
be used as standard traditional telephone sockets, or to connect the unit to a
traditional PBX or public telephone network. Only connect RJ-45 data
connectors, network telephony systems, or network telephones to these
sockets.

Either shielded or unshielded data cables with shielded or unshielded
jacks can be connected to these data sockets.

Switch 4400 — Front View Detail 15

10BASE-T/

100BASE-TX Ports

LEDs Table 5 lists LEDs visible on the front of the Switch, and how to read their

The Switch has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX ports
configured as Auto MDIX (cross-over). These ports automatically provide
the appropriate connection. 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.

status according to color. For information on using the LEDs for problem
solving, see “Solving Problems Indicated by LEDs” on page 46.

Ta b l e 5

LED Color Indicates

Port Status LEDs

Packet Green Full duplex packets are being transmitted/received on the

Status Green A high speed (100 Mbps) link is present, and the port is

Module Packet LEDs

Module Status LEDs

(continued)

LED behavior

port.

Yellow Half duplex packets are being transmitted/received on the

port.

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

enabled.

Green flashing A high speed (100 Mbps) link is present, but the port is

disabled.

Yellow A low speed (10 Mbps) link is present, and the port is

enabled.

Yellow flashing A low speed (10 Mbps) link is present, but the port is

disabled.

Off No link is present.

Green Full duplex activity being received or transmitted

Yellow Half duplex activity being received or transmitted

Off No activity

Green The Module is installed and supported. The Link Status has

been determined, and the port is enabled.

Green flashing The Module is installed and supported. The Link Status has

been determined, but the port is disabled.

16 C

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1: I

NTRODUCING THESUPERSTACK3SWITCH

LED Color Indicates

Yellow The Module is installed and supported. The Link status has

Yellow flashing A Module is installed, however, it is not supported.

Off The Module is not installed.

Unit LEDs

1–8 Green When the Switch forms a stack with other Switch 4400

Green rotating When a software upgrade is in progress, the Unit LEDs of the

Green flashing The Switch physically forms a stack with other Switch 4400

Off A fault has occurred.

Power/Self Test LED

Green The Switch is powered-up and operating normally.

Green flashing The Switch is either downloading software or is initializing

Yellow The Switch has failed its Power On Self Test.

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

4400

not been determined or there is no Link for a single port
Module.

units, the LED indicates the position of the unit in the stack
and that a link is present.

When the Switch is stand-alone and not part of a stack, LED
1ison.

unit that is being upgraded flash on and off in the following
sequence —

1,2,4,6,8,7,5,3 (24-port)

1,2,3,4,8,7,6,5 (48-port)

units, but cannot be managed as part of that stack until all
units have been upgraded to software version 2.0 or later.

(which includes running a Power On Self Test).

Power Supply Unit.

Switch 4400 — Rear View Detail 17

Switch 4400 — Rear View Detail

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 3

Switch 4400 — rear view

in the range 90-260 VAC.

To protect against internal power supply failure, you can use this socket
to connect a Switch 4400 to a SuperStack 3 Advanced Redundant Power
System (RPS). See “Connecting a Redundant Power System” on page 24.

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.

Expansion Module

Slots

You can use these slots to install Expansion Modules. These allow the
Switch to support various forms of connection and add extra functionality
to your Switch. Contact your supplier for more information.

WARNING: When an Expansion Module is not installed, ensure the
blanking plate is fitted by tightening all screws with a suitable tool.

18 C

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1: I

NTRODUCING THESUPERSTACK3SWITCH

4400

Default Settings Table 6 shows the default settings for the Switch 4400:

Ta b l e 6

Feature Switch 4400

Automatic IP Configuration Enabled

Port Status Enabled

Port Speed 10/100 Mbps ports are auto-negotiated

Duplex Mode All fixed 10BASE-T and 100BASE-TX ports are

Flow Control

Broadcast Storm Control Enabled

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

IP Multicast Filtering Filtering enabled

Rapid Spanning Tree Protocol Enabled

RMON Alarm Enabled

Smart Auto-Sensing Enabled

Webcache Support Disabled

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

Default Settings

auto-negotiated

Enabled in half duplex

■

Auto-negotiated in full duplex

■

(VLAN 1) with 802.1Q learning operational

Fast Start:

Enabled on front panel ports

■

Disabled on rear panel port

■

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

I

NSTALLING THESWITCH

This chapter contains the information you need to install and set up the
Switch 4400. It covers the following topics:

■

Package Contents

■

Choosing a Suitable Site

■

Rack-mounting

■

Placing Units On Top of Each Other

■

The Power-up Sequence

WARNING: Safety Information. Before installing or removing any
components from the Switch 4400 or carrying out any maintenance
procedures, you must read the safety information provided in Appendix A
of this guide.

AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever
tout composant du Switch 4400 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 4400 entfernen oder dem Switch 4400 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

Choosing a Suitable Site

Switch 4400 (24-port) (3C17203) or Switch 4400 (48-port) (3C17204)

■

CD-ROM

■

Getting Started Guide (this guide)

■

Implementation Guide

■

Management Quick Reference Guide

■

Release Notes

■

Unit Information Labels

■

Warranty Information

■

Power Cord

■

2 x Mounting brackets

■

4xScrews

■

4 x Rubber feet

■

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 flow around the Switch does not exceed 40°C(104°F).

■

Rack-mounting 21

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.

■

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

■

No more than eight Switch units are placed on top of one another, if
the units are free-standing.

Rack-mounting

The Switch 4400 is 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 3.

Figure 4

Fitting a bracket for rack-mounting

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

22 CHAPTER 2: INSTALLING THE SWITCH

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:

■

■

■

■

You may need this information for fault reporting purposes.

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

Placing Units On TopofEachOther

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

3Switch

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 Switch 4400 units can be stacked together and then treated as a single

manageable unit with one IP address. Any combination of 24-port and
48-port units is allowed in a single stack, as long as the total number of
front panel ports does not exceed the limit of 192 ports. The following
combinations are allowed:

4 x 48-port Switches

■

3 x 48-port Switches and 2 x 24-port Switches

■

2 x 48-port Switches and 4 x 24-port Switches

■

1 x 48-port Switch and 6 x 24-port Switches

■

8 x 24-port Switches

■

The Power-up Sequence 23

Using the Expansion Module slot at the rear of the Switch, you can stack
Switch units together in two ways:

■

The SuperStack 3 Switch Cascade Stacking Kit (3C17227) consists of
two Cascade Modules and a Cascade Cable. This kit allows you to
connect two Switch 4400 units together.

■

The SuperStack 3 Cascade Extender Kit (3C17228) consists of one
Cascade Module, one Cascade Cable and one Cascade Extender Unit.
This kit allows you to connect any of the combinations of Switch 4400
units shown in “Stacking Units” on page 22. Each Cascade Extender
Kit enables you to add one additional Switch to your stack.

For more information contact your supplier, and refer to the user
documentation that accompanies these Cascade Kits.

When the Switch 4400s are stacked together they are assigned a unit
number from bottom-to-top for management purposes. When further
switches are added to the stack, they can be positioned at the bottom of
the stack or at the top. Either way, the Switch management software will
re-order the Switch unit numbers into a logical order again (from bottom
to top).

The Power-up Sequence

Powering-up the

Switch 4400

Checking for Correct

Operation of LEDs

The following sections describe how to get your Switch 4400
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.

WhenthePOSThascompleted,checkthePower/SelfTestLEDtomake
sure that your Switch is operating correctly. Table 7 shows possible colors
for the LED.

24 CHAPTER 2: INSTALLING THE SWITCH

Ta b l e 7 Power/Self Test LED colors

Color State

Green The Switch is powered-up and

Yellow The Switch has failed its Power On Self

Off The Switch is not receiving power.

If there is evidence of a problem, see “Solving Problems Indicated by
LEDs” on page 46.

operating normally.

Test. This occurs if any of the ports fail
during power-up.

Connecting a

Redundant Power

System

Choosing the Correct

Cables

You can connect a SuperStack 3 Advanced Redundant Power System
(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.

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 4400 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.

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,youneedanautomaticcross-over cable. Many ports on
workstations and servers are configured as MDI (straight-through). If you

The Power-up Sequence 25

want to make a connection to an MDI port, you need to use a standard
straight-through cable. See Table 8.

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

Ta b l e 8 Cables required to connect the Switch 4400 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)

✓

✓

✕

✕

✕

✓

26 CHAPTER 2: INSTALLING THE SWITCH

3

S

ETTING

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

■

Initial Switch Setup

U

PFOR

M

ANAGEMENT

■

Manual Setup

■

Automatic Setup

■

Methods of Managing a Switch

■

Setting Up Command Line Interface Management

■

Setting Up Web Interface Management

■

Setting Up SNMP Management

■

Default Users and Passwords

28 CHAPTER 3: SETTING UPFORMANAGEMENT

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

Configure IP information for your Switch by completing initial Switch

■

setup

Prepare for your chosen method of management

■

CAUTION: To protect your Switch from unauthorized access, you must
change all 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 44.

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

■

it is not possible to configure the DHCP or BootP server to allocate

■

static IP addresses (this is necessary to ensure that the Switch is always
allocated the same IP address).

For most installations, 3Com recommends that you configure the Switch
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 “Manual Setup” section on page 31 and connect to a front
panel port or the console port to manually configure the IP information.

Setting Up Overview 29

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 an IP
address in the range 169.254.1.0 to 169.254.254.255. This 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.

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 that accompanies your Switch.

You should use the automatic IP configuration method if:

■

your network uses DHCP or BootP to allocate IP addresses, 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.

If you use the automatic IP configuration method, you need to view the
automatically allocated IP information before you can begin
management. Work through the “Automatic Setup” sectiononpage36
and use 3Com Network Supervisor or connect to the console port to
discover the automatically allocated IP information.

30 CHAPTER 3: SETTING UPFORMANAGEMENT

Preparing for Management

Initial Switch Setup

Manual Setup Automatic Setup

Connecting to a front panel
port

Connecting to the console
port

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 39.

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.

Before you begin the initial setup of your Switch, you must first
determine your preferred setup method. There are two setup methods:

Manual Setup — You have two choices of how to configure the IP

■

information, as shown in Table 9.

Automatic Setup — Your Switch must be online, that is, connected to

■

a network. You have two choices of how to view the allocated IP
information, as shown in Table 9.

Ta b l e 9

Use the web interface to
manually enter IP
information by accessing
the Switch using its default
IP address

169.254.100.100.

Use the command line
interface to manually enter
IP information.

Initial Switch Setup Methods

Using 3Com Network
Supervisor

Connecting to the console
port

Use 3Com Network
Supervisor to detect the
automatically allocated IP
information.

Use the command line
interface to view the
automatically allocated IP
information.

Manual Setup 31

Manual Setup

Connecting to a Front

Panel Port

You can set up a Switch manually 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.

■

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.

Pre-requisites

■

A workstation running Windows 95/98/2000 or Windows NT.

■

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 42.

■

Youneedtohavethefollowingsothatyoucanmanuallysetupthe
Switch with IP information:

■

IP address

■

subnet mask

■

default gateway

Connecting the Workstation to the Switch

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

showninFigure5.

Figure 5

Connecting a workstation to the Switch via a front panel port

32 CHAPTER 3: SETTING UPFORMANAGEMENT

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.

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 — 255.255.255.0

■

Setting Up the Switch with IP Information

You are now ready to manually set up the Switch with IP information
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.

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

as your user name and

3 At the login and password prompts, enter

admin

press Return at the password prompt. 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 39.

Manual Setup 33

Connecting to the

Console Port

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.

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.

■

Asuitablecable:

■

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 on page 57.

■

Youneedtohavethefollowingsothatyoucanmanuallysetupthe
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 6.

Figure 6

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.

34 CHAPTER 3: SETTING UPFORMANAGEMENT

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

■

8databits

■

no parity

■

1stopbit

■

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.

as your user name and

2 At the login and password prompts, enter

admin

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 7.

Manual Setup 35

Figure 7 Example top-level command line interface menu

3

At the Select menu option prompt enter the protocol ip
basicConfig 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 39.

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.

36 CHAPTER 3: SETTING UPFORMANAGEMENT

Automatic Setup You can set up the Switch automatically whilst it is connected to a

network in either of the following 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).

Using 3Com Network

Supervisor

Connecting to the

Console Port

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.

If your network does not have a DHCP or BootP server, 3Com Network
Supervisor must be on the same subnet as the Switch, as Auto-IP
addresses are non-routable.

To set up your Switch automatically 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.)

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.

■

Automatic Setup 37

■

Asuitablecable:

■

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 on page 57.

■

A Category 5 twisted pair Ethernet cable with RJ-45 connectors to
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 8.

Figure 8

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

■

8databits

■

no parity

■

1stopbit

■

no hardware flow control

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

38 CHAPTER 3: SETTING UPFORMANAGEMENT

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.

as your user name and

3 At the login and password prompts, enter

admin

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 9.

Figure 9

Example top-level command line interface menu

4 At the Select menu option prompt enter the protocol ip

interface summary command. At the Select IP interfaces

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

Methods of Managing a Switch 39

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 39.

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 10), or remotely over the network (see Figure 11).

Figure 10

Figure 11

CLI management via the console port

CLI management over the network

Refer to “Setting Up Command Line Interface Management” on
page 41.

40 CHAPTER 3: SETTING UPFORMANAGEMENT

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 12).

Figure 12

Web interface management over the network

Refer to “Setting Up Web Interface Management” on page 42.

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

running the Simple Network Management Protocol (SNMP) as shown in
Figure 13. For example, you can use the 3Com Network Supervisor
software that is provided on the CD-ROM that accompanies your Switch.

Figure 13

SNMP management over the network

Refer to “Setting Up SNMP Management” on page 43.

Setting Up Command Line Interface Management 41

Setting Up Command Line Interface Management

CLI Management via

the Console Port

CLI Management over

the Network

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 33.

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 “Initial Switch Setup” on page 30.

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

management workstation. You can check this by trying to browse the
WorldWideWeb.Ifyoucanbrowse,theIPprotocolisinstalled.

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.

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.

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).

42 CHAPTER 3: SETTING UPFORMANAGEMENT

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
Figure7onpage35.

Setting Up Web Interface Management

Pre-requisites

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 “Initial Switch Setup” on page 30.

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

■

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
browsers:

Netscape Navigator®version4.5,4.6,or4.7.

■

Microsoft Internet Explorer version 4.0, 5.0, or 5.5.

■

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

TomanageaSwitchusingthewebinterfaceoveranIPnetwork:

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

management workstation. You can check this by trying to browse the
WorldWideWeb.Ifyoucanbrowse,theIPprotocolisinstalled.

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)

Setting Up SNMP Management 43

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

Setting Up SNMP Management

Pre-requisites

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.

■

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.

44 CHAPTER 3: SETTING UPFORMANAGEMENT

Default Users and Passwords

IfyouintendtomanagetheSwitchusingthewebinterfaceorthe
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 Table 10.

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

Ta b l e 1 0

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 Users

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 security device user modify commandontheCLI,or

■

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.

4

P

ROBLEM

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

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.

S

OLVING

46 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:

testingitinanotherdevice

■

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. The fault type will be indicated on the unit LEDs.
Contact your supplier for advice.

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

Check that:

TheSwitchandthedeviceattheotherendofthelink(orcable)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 10BASE-T or 100BASE-T
where auto-negotiation is disabled and incorrect cables are being used
(cross-over or straight)

Auto-negotiation problems will occur with fiber if:

The Receiver (RX) and Transceiver (TX) cable connectors are

■

swapped

Fibers are broken

■

Auto-negotiation differs at either end (a link appears at the ‘fixed’

■

end and not at the auto-negotiation end)

Solving Hardware Problems 47

The Unit LED is flashing green

The Switch unit physically forms a stack with other Switch 4400 units, but
cannot be managed as part of that stack because one or more units have
not been upgraded to software version 2.0 or later. You must upgrade
each unit in the stack to this software version, which is available on the
CD-ROM that accompanies your Switch.

Solving Hardware Problems

In the rare event of your Switch unit experiencing a hardware failure,
refer to the list of suggested solutions below.

An expansion module is installed and the unit will not power up

Ensure that the expansion module is fully seated in the slot and the
connectors are engaged so that the securing screws can be tightened.

An SNMP fan fail trap is received

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 the AC mains

supply. If the unit has no AC main supply, remove and reconnect the DC
RPS supply.

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

Unit fails, no SNMP fan fail trap is received

1 Power cycle the unit. To do this, remove and reconnect the AC mains

supply. If the unit has no AC mains supply, remove and reconnect the DC
RPS supply.

2 Checkthecommandlineinterface(system summary command) to

determine whether a thermal shutdown has occurred.

3 If no, return the unit:

If yes, check that:

■

The air vents are not obstructed.

■

The ambient temperatures and environmental conditions meet those
specifiedinAppendixC.

4 Power cycle the unit. If a further thermal shutdown occurs, and all

environmental conditions are satisfactory, return the unit to 3Com.

48 CHAPTER 4: PROBLEM SOLVING

Solving Communication Problems

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.

TheIPaddressissplitintotwoparts:

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

■

which the device resides

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

■

network

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.

Solving Communication Problems 49

How do you obtain a registered IP Address?

The IP registration system ensures that every IP address used is unique; if
youdonothavearegisteredIPaddress,youmaybeusinganidentical
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:

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.

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

50 CHAPTER 4: PROBLEM SOLVING

A

S

AFETYINFORMATION

You must read the following safety information before carrying out any
installation or removal of components, or any maintenance procedures
on the Switch 4400.

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: Lesavertissementsprésentent 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.

52 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 4400 in a stack with SuperStack II or
SuperStack 3 units that are narrower than the 4400, the Switch 4400
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

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.

United
Kingdom only

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

■

andbefittedwitha5AfusewhichcomplieswithBS1362.

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

■

be of type H03VVF3GO.75 (minimum).

Europe only:

The supply plug must comply with CEE 7/7 (“SCHUKO”).

■

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

■

be of type H03VVF3GO.75 (minimum).

Denmark

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

■

standard DK2-1a or DK2-5a.

Switzerland

The supply plug must comply with SEV/ASE 1011.

■

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.

L’information de Sécurité Importante 53

WARNING: Thesocketoutletmustbeneartotheunitandeasily
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 4400, 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.

WARNING: When an Expansion Module is not installed ensure the
blanking panel is fitted by tightening all screws with a suitable tool.

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 4400 doit être installée en dessous des
unités Hub plus étroites.

54 APPENDIX A: SAFETY INFORMATION

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

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

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

Etats-Unis et
Canada

Danemark

Europe

Suisse

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)

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

■

D1 de la norme DK2 1a ou DK2 5a

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

■

(“SCHKO”)

LE cordon secteur doit porter la mention <HAR> ou

■

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

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

■

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.

Wichtige Sicherheitsinformationen 55

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

AVERTISSEMENT: Points d’accès RJ-45. Ceux-ci sont protégéspardes
prises de données. Ils ne peuvent pas être utilisés comme prises de
téléphone conventionnelles standard, ni pour la connection de l’unitéà
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 protégésavecdes
jacks protégés ou non protégés à cesprisesdedonnées.

AVERTISSEMENT: Si le module d’expansion nest pas installé, veillez à
bien installer la plaque d’obturation et serrez toutes les vis à l’aide d’un
outil approprié.

Wichtige Sicherheitsinformationen

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

VORSICHT: Wenn die Switch 4400 Einheit in einer Stapel mit anderen
SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch 4400
Einheit unter die schmaleren Hub Einheiten eingebaut werden.

VORSICHT: Das Gerätmuß geerdet sein.

VORSICHT: Das Gerätmuß 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(derAnschluß an das Gerät, nicht der
Wandsteckdosenstecker) muß eine passende Konfiguration füreinen
Geräteeingang gemäß EN60320/IEC320 haben.

56 APPENDIX A: SAFETY INFORMATION

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.

VORSICHT: Ist kein Erweiterungsmodul installiert, überprüfen Sie bitte
den Sitz der Stanzplatte, indem Sie alle Schrauben mit einem geeigneten
Werkzeug anziehen.

PIN-

OUTS

B

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

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

58 APPENDIX B: PIN-OUTS

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

RJ-45 Pin Assignments

Pin assignments are identical for 10BASE-TX and 100BASE-T RJ-45
connectors.

Ta b l e 1 1

Pin Number Signal Function

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-

Pin assignments

RJ-45 Pin Assignments 59

Ta b l e 1 2 Pin assignments

Pin Number Signal Function

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-

60 APPENDIX B: PIN-OUTS

T

ECHNICALSPECIFICATIONS

C

Switch 4400 (24-port)

Ta b l e 1 3

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

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

Safety

Agency Certifications UL 1950, EN60950, CSA 22.2 No. 950, IEC 60950

EMC

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

Immunity EN 55024

Heat Dissipation 75 watts maximum (1300 BTU/hour maximum)

Power Supply

AC Line Frequency 50/60 Hz

Input Voltage Options 90–240 VAC

Current Rating 2.3 A (amps)(maximum)

(continued)

Switch 4400 (24-port) Technical Specifications

Weight: 2.8 kg (6.2 lbs)

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).

ICES-003 Class A, AS/NZS 3548 Class A, CNS 13438 Class A, EN61000-3-2,
EN61000-3-3

62 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 4400 (48-port) 63

Switch 4400 (48-port)

Ta b l e 1 4

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

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

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,

Immunity EN 55024

Heat Dissipation 120 watts maximum (410 BTU/hour maximum)

Power Supply

AC Line Frequency 50/60 Hz

Input Voltage Options 90–240 VAC

Current Rating 2.8 A (amps)(maximum)

Standards Supported SNMP

Switch 4400 (48-port) Technical Specifications

Weight: 3.2 kg (7.1 lbs)

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).

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

EN61000-3-2, EN61000-3-3

Terminal Emulation

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)

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)

64 APPENDIX C: TECHNICAL SPECIFICATIONS

D

T

ECHNICALSUPPORT

3Com provides easy access to technical support information through a
variety of services. This appendix describes these services.

Information contained in this appendix is correct at time of publication. For
the most recent information, 3Com recommends that you access the
3Com Corporation World Wide Web site.

Online Technical Services

World Wide Web Site To access the latest networking information on the 3Com Corporation

3Com

Knowledgebase Web

Services

3Com offers worldwide product support 24 hours a day, 7 days a week,
through the following online systems:

■

World Wide Web site

■

3Com Knowledgebase Web Services

■

3Com FTP site

World Wide Web site, enter this URL into your Internet browser:

http://www.3com.com/

This service provides access to online support information such as technical
documentation and software, as well as support options that range from
technical education to maintenance and professional services.

The 3Com Knowledgebase is a database of technical information to help
you install, upgrade, configure, or support 3Com products. The
Knowledgebase is updated daily with technical information discovered by
3Com technical support engineers. This complimentary service, which is
available 24 hours a day, 7 days a week to 3Com customers and partners,
is located on the 3Com Corporation World Wide Web site at:

http://knowledgebase.3com.com

66 APPENDIX D: TECHNICAL SUPPORT

3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the

3Com public FTP site. This service is available 24 hours a day, 7 days a week.

To connect to the 3Com FTP site, enter the following information into
your FTP client:

Hostname:

■

Username:

■

Password:

■

You do not need a user name and password with Web browser software
such as Netscape Navigator and Internet Explorer.

ftp.3com.com

anonymous

<your Internet e-mail address>

Support from Your Network Supplier

Support from 3Com

If you require additional assistance, contact your network supplier. Many
suppliers are authorized 3Com service partners who are qualified to
provide a variety of services, including network planning, installation,
hardware maintenance, application training, and support services.

When you contact your network supplier for assistance, have the
following information ready:

Product model name, part number, and serial number

■

A list of system hardware and software, including revision levels

■

Diagnostic error messages

■

Details about recent configuration changes, if applicable

■

If you are unable to contact your network supplier, see the following
section on how to contact 3Com.

If you are unable to obtain assistance from the 3Com online technical
resources or from your network supplier, 3Com offers technical telephone
support services. To find out more about your support options, call the
3Com technical telephone support phone number at the location nearest
you.

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

Product model name, part number, and serial number

■

Support from 3Com 67

■

A list of system hardware and software, including revision levels

■

Diagnostic error messages

■

Details about recent configuration changes, if applicable

Here is a list of worldwide technical telephone support numbers. These
numbers are correct at the time of publication. Refer to the 3Com Web
site for updated information.

Country Telephone Number Country Telephone Number

Asia, Pacific Rim

Australia
Hong Kong
India

Indonesia
Japan
Malaysia
New Zealand
Pakistan
Philippines

Europe, Middle East and
Africa

From anywhere in these
regions, call:

Europe and South Africa

From the following countries, you may use the toll-free numbers:

Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy

Latin America

Brazil
Mexico

1 800 678 515
800 933 486
[phone] or
000800 6501111
001 800 61 009
03 5783 1270
1800 801 777
0800 446 398
[phone]
1235 61 266 2602

[phone] phone
[phone] fax

0800 297468
0800 71429
800 17309
0800 113153
0800 917959
0800 1821502
06800 12813
1800 553117
1800 9453794
800 8 79489

0800 13 3266
01 800 849CARE

P.R. of China

Singapore
S. Korea

Taiwan, R.O.C.
Thailand

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

Puerto Rico
Central and South America

10800 61 00137 or
021 6350 1590 or
00800 0638 3266
800 6161 463
00798 611 2230 or
02 3455 6455
00798 611 2230
0080 611 261
001 800 611 2000

0800 3625
0800 0227788
800 11376
00800 3111206
0800 831416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197

800 666 5065
AT&T [phone]

North America

1800NET3Com
(1 800 638 3266)

Enterprise Customers:
1 800 876-3266

68 APPENDIX D: TECHNICAL SUPPORT

Returning Products
for Repair

Before you send a product directly to 3Com for repair, you must first
obtain an authorization number. Products sent to 3Com without
authorization numbers will be returned to the sender unopened, at the
sender’sexpense.

To obtain an authorization number, call or fax:

Country Telephone Number Fax Number

Asia, Pacific Rim + 65 543 6500 + 65 543 6348

Europe, South Africa, and Middle East [phone] + 44 (0)1442 432524

Central and South America 525 201 0075

Argentina
Bolivia
Brazil

Caribbean
Chile
Colombia
Ecuador
Mexico
Paraguay
Peru
Uruguay
Venezuela

From the following countries, you may call the toll-free numbers; select option 2 and then option 2:

Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
Italy
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.

0810 222 3266
511 241 1691
0800 133266 or
55 11 5643 2700
525 201 0004
562 240 6200
525 201 0004
525 201 0004
525 201 0004
525 201 0004
511 241 1691
525 201 0004
525 201 0004

0800 297468
0800 71429
800 17309
0800 113153
0800 917959
0800 1821502
00800 12813
1800553117
1800 9453794
1678 79489
0800 0227788
800 11376
00800 3111206
0800 831416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197

Returning Products for Repair 69

Country Telephone Number Fax Number

U.S.A. and Canada 1 800 NET 3Com

(1 800 638 3266)

Enterprise Customers:
1 800 876 3266

1 408 326 7120
(not toll-free)

70 APPENDIX D: TECHNICAL SUPPORT

INDEX 71

NDEX

I

Numbers

3C number 22
3Com Knowledgebase Web Services 65
3Com URL 65

A

access levels of default users 44
automatic setup 36

3Com Network Supervisor 36
console port 36

B

browsers

choosing 42

C

cable

choosing the correct 24

pin-outs 57
cascade cable 23
Cascade Extender Kit 23
Cascade Stacking Kit 23
CD-ROM 9
command line interface

management 39
console port 17
conventions

notice icons, About This Guide 8

text, About This Guide 8
cross-over configuration 24

F

factory defaults 18

H

hardware features 12

I

initial switch setup 30
installing the Switch 19

prerequisites 20

IP addressing

registered 49

IP configuration 28

L

LEDs 15
logging in as a default user 44

M

MAC address of the Switch 22
management

methods 39
preparing for 30
setting up 27, 28

manual setup 31

console port 33

front panel port 31
MDI configuration 24
MDIX configuration 24
MIBs 66

N

network supplier support 66

O

online technical services 65

D

default

settings 18
users 44

E

Ethernet address of the Switch 22

P

passwords

of default users 44
pin assignments

modem cable 58

null modem cable 57

RJ45 58

serial cable 57

72 INDEX

pin-outs 57
ports

console 17
power socket 17
powering-up a Switch 4400 23
problem solving 45

communication problems 48

hardware problems 47

IP addressing 47

LEDs 46
product name 22

R

rack mounting a Switch 4400 21
Redundant Power System. See RPS
returning products for repair 68
RPS 17

connecting 24

socket 17

S

safety information

English 52

French 53

German 55
serial number of the Switch 22
serial port. See console port
Simple Network Management Protocol. See SNMP
SNMP 43
SNMP management 40

setting up 43
socket

power 17

RPS 17
software features 13
specifications, system 61
stacking a Switch 4400 23
straight-through configuration 24
Switch 4400

3C number 22

automatic setup 36

console port 17

dimensions 61

Ethernet address 22

features 12, 13

initial setup 30

installation 19, 20

MAC address 22

manual setup 31

power socket 17

powering-up 23

product name 22
rack mounting 21
RPS socket 17
serial number 22
size 61
stacking 22
unit information label 22
weight 61

system specifications 61

T

technical support

3Com Knowledgebase Web Services 65
3Com URL 65
network suppliers 66
product repair 68

troubleshooting 45

U

unit information label 22
URL 65

W

Web browsers

choosing 42

web interface

choosing a browser 42

web interface management 40

setting up 42

World Wide Web (WWW) 65

REGULATORY NOTICES

FCC STATEMENT

INFORMATION TO THE USER

CSA STATEMENT

CE S

TATEMENT(EUROPE

)

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.

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.

This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment
Regulations.

Cet appareil numériquedelaclasseArespectetouteslesexigencesduRèglement sur le matériel brouilleur
du Canada.

This product complies with the European Low Voltage Directive 73/23/EEC and EMC Directive 89/336/EEC as
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 S

BSMI S

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