3com 4200G User Manual

3Com® Switch 4200G Family

Getting Started Guide

4200G 12-Port
4200G 24-Port
4200G 48-Port
4200G PWR 24-Port

www.3Com.com

Part No. 10014914 Rev. AD
Published February 20

10

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DOWNLOAD THE LATEST

SOFTWARE AND DOCUMENTATION
FOR YOUR 3COM SWITCH

Thank you for purchasing a 3Com Switch 4200G. As part of our
commitment to bringing you the most capable and dependable network
equipment, 3Com offers free software maintenance updates and
documentation updates on our website.

To obtain the most up-to-date operating software and user
documentation for the Switch 4200G, point your web browser to:
www.3Com.com/4200G and select the “Support and Registration” link.

You must register your 3Com switch to receive the software upgrade. To
register, point your web browser to eSupport.3Com.com.

CONTENTS

DOWNLOAD THE LATEST SOFTWARE AND DOCUMENTATION FOR YOUR
3C

OM SWITCH

ABOUT THIS GUIDE

Before You Start 3
Conventions 3
Related Documentation 4
Documentation Comments 5

1 INTRODUCING THE SWITCH 4200G FAMILY

About the Switch 4200G 8
Switch 4200G—Front View Detail 9
Switch 4200G — Rear View Detail 13
Default Settings 14

2 INSTALLING THE SWITCH

Package Contents 16
Rack-mounting the Switch 16
The Power-up Sequence 19
SFP Operation 20
Connecting a Redundant Power Supply 21
Connecting the Console Cable 25

3 SETTING UP SWITCH MANAGEMENT

Methods of Managing a Switch 27
Setting Up Your Switch 29
Manually Configuring IP Information 32
Viewing Automatically Configured IP Information 37
Setting Up Command Line Interface Management 38
Setting Up Command Line Interface Management using SSH 39
Setting Up Web Interface Management 40
Setting Up SNMP Management 41
Default Users and Passwords 41

4 PROBLEM SOLVING

Solving Problems Indicated by LEDs 44

2 CONTENTS

Solving Hardware Problems 44
Solving Communication Problems 46

A TECHNICAL SPECIFICATIONS

Switch 4200G 12-Port 47
Switch 4200G 24-Port 48
Switch 4200G (48-Port) 49
Switch 4200G PWR 24-Port 49
Related Standards 50

B OBTAINING SUPPORT FOR YOUR PRODUCT

Register Your Product 51
Purchase Value-Added Services 51
Troubleshoot Online 52
Access Software Downloads 52
Telephone Technical Support and Repair 52
Contact Us 53

C 3COM NETWORK MANAGEMENT

3Com Network Supervisor 55
3Com Network Director 56
3Com Network Access Manager 56
3Com Enterprise Management Suite 57
Integration Kit with HP OpenView Network Node Manager 57

D PIN-OUTS

Null Modem Cable 59
PC-AT Serial Cable 59
Modem Cable 60
Ethernet Port RJ-45 Pin Assignments 60

E REDUNDANT POWER SUPPLY SAFETY INFORMATION

Important Safety Information 63
L’information de Sécurité Importante 64
Wichtige Sicherheitsinformationen 66
Información de Seguridad Importante 67
Importanti Informazioni di Sicurezza 68
Wa¿ne informacje o zabezpieczeniach 69
Regulatory Notices 71

INDEX

ABOUT THIS GUIDE

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

®

3Com
software to the latest version, refer to the Switch 4200G Release Notes
available on 3Com’s Web site at 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).

Before You Start This section contains information about the documents that are available

your Switch 4200G.

Release Notes The Release Notes provide important information about the current

software release, including new features, modifications, and known
problems. You should read the Release Notes before installing the Switch
in your network.

Switch 4200G Family. For information on upgrading your

If the information in the Release Notes differ from the information in this
guide, follow the instructions in the Release Notes.

User Documentation The Command Reference Guide, Configuration Guide, and Release Notes

are available in Adobe Acrobat Reader Portable Document Format (PDF)
on the 3Com World Wide Web site:

http://www.3com.com/

Conventions Table 1 lists the notice icons that are used throughout this guide.

4 ABOUT THIS GUIDE

Tab le 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

Related Documentation

In addition to this guide, Switch 4200G documentation set includes the
following:

■ Switch 4200G Configuration Guide

This guide contains information on the features supported by your
Switch and how they can be used to optimize your network. It
available in PDF format on 3Com’s Web site at www.3com.com.

■ Switch 4200G Quick Reference Guide

This guide contains:

■ a list of the features supported by the switch.

■ a summary of the command line interface commands for the

switch. This guide is also available under the Help button on the
web interface.

■ Switch 4200G Command Reference Guide

This guide provides detailed information about the web interface and
command line interface that enable you to manage the switch. It
available in PDF format on 3Com’s Web site at www.3com.com.

■ Release Notes

These notes provide information about the current software release,
including new features, modifications, and known problems as well as
instructions for upgrading your software to the latest version. The
Release Notes are available in PDF format on 3Com’s Web site at
www.3com.com.

Documentation Comments 5

Documentation Comments

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

[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 10014914AA
Switch 4200G Family Getting Started Guide

Page 21

Please note that we can only respond to comments and questions about
3Com product documentation at this e-mail address. Questions related to
technical support or sales should be directed in the first instance to your
network supplier.

6 ABOUT THIS GUIDE

INTRODUCING THE SWITCH 4200G

1

F

AMILY

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

■ About the Switch 4200G

■ Switch 4200G—Front View Detail

■ Switch 4200G — Rear View Detail

■ Default Settings

8 CHAPTER 1: INTRODUCING THE SWITCH 4200G FAMILY

About the Switch 4200G

Summary of Hardware

Features

The Switch 4200G Family products include mixed media devices that consist of:

■ 12, 24, or 48 10/100/1000BASE-T ports

■ Four 1000BASE-X SFP ports

■ One optional module slot for a 10 Gigabit Ethernet port module on the Switch

4200G 12-Port unit. This requires an optional XFP.

■ Two optional module slots for a 10 Gigabit Ethernet port module on the Switch

4200G 24-Port and 48-Port units. This requires an optional XFP.

■ One RJ-45 connector for serial management

■ 4200G 24-ports POE

■ 100 SFP, 4200G supports both 100/1000 SFP

The Switch 4200G Family provides high-performance workgroups with a
backbone-to-server connection.The Switch 4200G PWR 24-Port provides similar
Ethernet functionality to other family models with the added benefit of IEEE

802.3af Power over Ethernet.

For information about using the switch’s software features, refer to the
“Command Reference Guide” and the “Configuration Guide” available in PDF
format on 3Com’s Web site at www.3com.com.

Table 2 summarizes the Switch 4200G’s hardware features.

Tab le 2 Hardware Features

Feature Switch 4200G

Addresses Up to 8,000 supported

Auto-negotiation Supported on all ports

Forwarding Modes Store and Forward

Duplex Modes Half and full duplex on all front panel ports

Auto MDI/MDIX Supported on all ports. If fiber SFP transceivers are used,

Flow Control In full duplex operation all ports are supported

Traffic Prioritization Supported (using the IEEE Std 802.ID, 1998 Edition):

Ethernet, Fast
Ethernet, and Gigabit
Ethernet Ports

SFP Ethernet Ports Supports fiber Gigabit Ethernet long-wave (LX),

Mounting 19-inch rack or standalone mounting

Clustering Up to 32 units can be linked together (members and 1

Auto MDIX is not supported.

Eight traffic queues per port

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

long-haul (LH70) and copper (T) transceivers in any
combination.

commander)

Switch 4200G—Front
View Detail

Port Status LEDs

10/100/1000BASE-T

Figure 1 Switch 4200G 12-Port—front view

Unit Status

Display

SFP Status

LEDs

Console

Port

Mode
Gr een=Speed
Ye llow=Duplex

Switch 4200G—Front View Detail 9

Power LED

PWR

MOD 1

MOD 2

10/100/1000BASE-T Ports

Figure 2 Switch 4200G 24-Port—front view

Port Status LEDs

Speed: (100Base-TX) Gr een = 100Mbps Ye llow = 10Mbps Duplex: Gr een = Full Duplex, Ye llow = Half Duplex Powe r : Gr een = Delivering Powe r, Ye llow = Fault, Flashing Gr een = Over Budget

10/100/1000BASE-T

10/100/1000BASE-T Ports

Figure 3 Switch 4200G 48-Port—front viewSwitch 4200G 48-Port—front view

Port Status LEDs

Duplex:Green = Full Duplex, Yellow = Half DuplexSpeed:Green = 100Mbps, Yellow = 10Mbps

Power:Green = Deliverng Power. Yellow=Fault, Flashing Green=Over Budget

Gigabit SFP Ports

SFP Status

LEDs

26

27/25

25

Gigabit SFP Ports

Console

Port

28/26

Mode

Switch

Unit Status

Display

Mode

Switch

Mode
Gr een=Speed
Ye llow=Duplex

Mode LED

PWR

MOD 1

MOD 2

Mode LED

Console Port

10Gbps

Interface Slot

LEDs

Power LED

10Gbps

Interface Slot

LEDs

Unit Status

Display

49

50

Mode

Switch

Mode
Green=Speed
Yellow=Duplex

51/49

Mode

LED

Power

LED

52/50

PWR

MOD1

MOD1

10/100/1000BASE-T Ports

Figure 4

Switch 4200G PWR 24-Port—front view

Gigabit SFP

Ports

10Gbps

Interface Slot

LEDs

10 CHAPTER 1: INTRODUCING THE SWITCH 4200G FAMILY

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.

You can connect either shielded or unshielded data cables with shielded or
unshielded jacks to these data sockets.

10/100/1000BASE-T

Ports

The Switch 4200G provides 12, 24, or 48 auto-negotiating 10BASE-T/100BASE-TX
ports configured as Auto MDIX (crossover). When auto-negotiation is enabled
these ports automatically operate in MDI or MDIX mode as needed. These ports
provide 10/100/1000 Mbps full-duplex connections to other Gigabit Ethernet
devices. Full-duplex connections allow packets to be transmitted and received
simultaneously, which effectively doubles a link’s potential throughput.

These ports require either straight-through or cross-over Category 5 cables with
RJ-45 connectors at each end. The maximum UTP cable length is 100 m (328 ft)
over Category 5 cable.

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

1000BASE-X SFP Ports SFP (Small Form Factor Pluggable) ports support fiber Gigabit Ethernet long-wave

(LX), long-haul (LH70) and copper (T) SFP Transceivers in any combination. This
offers you the flexibility of using SFP transceivers to provide connectivity between
the Switch and remote 1000 Mbps workgroups or to create a high capacity
aggregated link backbone connection.

The default state for these ports is auto-negotiation enabled, where the speed,
duplex and flow control modes are negotiated. As the speed and duplex modes
are fixed by the media type, only the flow control is negotiated with the link
partner. Alternatively, auto-negotiation can be disabled (except 1000BASE-T which
auto-negotiation is mandatory) and the flow control setting can be manually
configured.

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

out-of-band management. As the console port on the Switch is an RJ-45 port, you
will need to connect an RJ-45 to DB9 converter cable to a standard null modem
cable in order to connect a terminal.

Unit Status Display The Status Display is a seven segment display visible on the front of the switch.

The Status Display indicates switch status conditions such as the unit number,
POST test ID, and software upgrade information. In the unlikely event of a
hardware fault, you can use the Status Display to help diagnose the problem. For
information on using the Status Display for problem solving, see “Solving
Problems Indicated by LEDs” on page 44.

Tab l e 3 Status Display

Display Mode LED Color Description

Digit (1–9) Mode LED flashing green POST (power-on startup tests) running.

Switch 4200G—Front View Detail 11

Tab l e 3 Status Display (continued)

Display Mode LED Color Description

Digit (0–8) Mode LED flashing red POST failure. Digit indicates ID of failed test.

0 POST test OK

1 CPU error

2 Switch chip error

3 RAM error

4 Flash error

5 Port error

6 PHY error

7 Packet memory error

8 CPLD error

Rotating bar segment Mode LED flashing green Software download in progress.

Flashing “F” Mode LED steady red Fan failure detected.

Flashing “t” Mode LED flashing red The switch is too hot; temperature is critical.

“C” Mode LED green or yellow The switch is a clustered commander unit.

“c” Mode LED green or yellow The switch is a clustered candidate unit.

“S” Mode LED green or yellow The switch is a clustered slave unit.

“1” Mode LED green or yellow The switch is not clustered.

LEDs Table 4 lists the LEDs that are visible on the front of the switch and how to read

their status. For information on using the LEDs for problem solving, see “Solving
Problems Indicated by LEDs” on page 44.

Tab l e 4 LED Behavior

LED Color Indicates

PWR LED

Green The Switch is powered-up and operating normally.

Green flashing The self test (POST) or software download is in progress.

Yellow flashing One or more ports have failed POST.

Red The switch has failed its power on self test.

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

supply unit.

Mode LED

Speed Green 10/100 port speed and activity, Gigabit SFP status and activity, or

stack status and activity.

Duplex Yellow 10/100 duplex and activity, Gigabit SFP duplex and activity, or

10/100/1000BASE-T Port LEDs

Speed Green A high speed (1000 Mbps) link is present, blinking off for every

Yellow A low speed link is present, blinking off for every packet received or

Yellow Flashing The port has failed POST.

Off No link is present.

stack activity.

packet received or transmitted.

transmitted.

12 CHAPTER 1: INTRODUCING THE SWITCH 4200G FAMILY

Tab le 4 LED Behavior (continued)

LED Color Indicates

Duplex Green Full duplex, blinking off for every packet received or transmitted.

Yellow Half duplex, blinking off for every packet received or transmitted.

Yellow flashing The port has failed POST.

Off No link is present.

1000BASE-X Port SFP Port LEDs

Speed Green A high speed (1000 Mbps) link is present.

Yellow Flashing The port has failed POST.

Off No link is present.

Duplex Green Full duplex packets are being transmitted and received on the port.

Yellow Half duplex packets are being transmitted and received on the port.

Yellow flashing The port has failed POST.

Off No link is present.

Table 5 lists the LEDs that are visible on the front of the Switch 4200G PWR
24-Port model and how to read their status..

Tab le 5 LED Behavior

LED Color Indicates

DC power supply LED

RPS Green, ON Both AC and DC inputs are normal

Yellow, ON The AC input is abnormal; the DC input is normal

OFF There is no DC input

Mode LED

Mode OFF Invalid

Green, ON The port LED is indicating rate mode.

Yellow, ON The port LED is indicating duplex mode.

Green, blinking
(1 Hz)

Port Status LED Behavior

Rate mode Green On The port is connected at 1,000 Mbps

Green Blinking
(30 ms per
packet)

Yellow On The port is connected at 10/100 Mbps

Yellow Blinking
(30 ms per
packet)

Yellow Blinking
(3 Hz)

Off The port is not connected

Duplex
mode

Green On The port is working in full duplex mode

The port LED is indicating Poe mode.

The port is receiving or sending data at 1,000 Mbps

The port is receiving or sending data at 10/100 Mbps

Port self test has failed

Switch 4200G — Rear View Detail 13

0 - 20%

21 - 40%

41 - 60%

61 - 80%

81 - 100%

Tab l e 5 LED Behavior (continued)

LED Color Indicates

Green Blinking

The port is receiving or sending data in full duplex mode
(30 ms per
packet)

Yellow On The port is working in half duplex mode

Yellow Blinking

The port is receiving or sending data in half duplex mode
(30 ms per
packet)

Yellow Blinking

Port self test has failed
(3 Hz)

Off The port is not connected

PoE mode Green On Power supply is normal.

Green Blinking
(3 Hz)

Power failure occurs if the power required exceeds the

maximum output power of the port or the available

power of the switch is insufficient.

Yellow On Power supply fails.

Yellow Blinking

Port self test has failed.
(3 Hz)

Off No power supply is available.

7-segment Digitron Behavior for PoE status

PoE status Red, ON The ratio of the power used by the port for PoE to the total

available power is displayed

Switch 4200G — Rear
View Detail

AC Power Input

Over-

Green, ON A "t" is displayed.

temperatur
e alarm

Figure 5 Switch 4200G—rear view

MOD 1

10Gbps Interface

Slot 1

MOD 2

10Gbps Interface

Slot 2

14 CHAPTER 1: INTRODUCING THE SWITCH 4200G FAMILY

Figure 6 Switch 4200G PWR 24-Port—rear view

Power Socket The switch automatically adjusts its power setting to any supply voltage in the

range of 100–240 VAC.

DC Input Rated voltange rage: -52 VDC to -56 VDC

10 Gbps Interface Slots The MOD 1 and MOD 2 interface slots accept the 10 Gbps SFP modules.

Default Settings Table 6 shows the default settings for the Switch 4200G Family.

Tab le 6 Default Settings

Feature Switch 4200G

Automatic IP Configuration Enabled

Port Status Enabled

Port Speed Auto-negotiated

Duplex Mode Auto-negotiated

Flow Control Auto-negotiated

Broadcast Storm Control Enabled

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

(VLAN 1) with IEEE Std 802.1Q-1998 learning
operational

Management VLAN Fixed as VLAN 1 on 4200G units. Can be any

Link Aggregation Control
Protocol (LACP)

IP Multicast Filtering Filtering enabled

Rapid Spanning Tree Protocol Enabled

Fast Start Enabled on front panel ports

RMON Alarm Enabled

Traffic Prioritization All ports prioritize NBX VoIP traffic (LAN and IP).

Port Security Disabled per port

Configuration Save and
Restore

VLAN for 4200G units.

Disabled per port

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

Disabled

2

INSTALLING THE SWITCH

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

■ Package Contents

■ Rack-mounting the Switch

■ The Power-up Sequence

■ SFP Operation

■ Connecting the Console Cable

WARNING: Safety Information. Before you install or remove any components
from the Switch or carry out any maintenance procedures, you must read the
3Com Switch Family Safety and Regulatory Information document enclosed
with your switch as well as

Information” on page 63.

Appendix E “Redundant Power Supply Safety

AVERTISSEMENT: Consignes de securite. AAvant d’installer ou d’enlever un
composant du commutateur ou de réaliser une procédure de maintenance, vous
devez prendre connaissance du document 3Com Switch Family Safety and
Regulatory Information accompagnant le commutateur ainsi que de l’annexe

“Redundant Power Supply Safety Information” on page 63.

E,

VORSICHT: Sicherheitsinformationen. Bevor Sie dem Switch Komponenten
hinzufügen oder daraus entfernten oder Wartungsaufgaben durchführen, müssen
Sie das dem Switch beigefügte Dokument 3Com Switch Family Safety and
Regulatory Information (Sicherheitsinformationen und Betriebsbestimmungen
der 3Com Switchfamilie) sowie Anhang E,

Information” on page 63

ADVERTENCIA: Información de seguridad. Antes de instalar o suprimir
cualquier componente del conmutador o de realizar cualquier tarea de
mantenimiento, debe leer el documento 3Com Switch Family Safety and
Regulatory Information adjunto con el conmutador así como el Apéndice E,

“Redundant Power Supply Safety Information” on page 63.

AVVERTENZA: Informazioni di sicurezza. Prima di installare o rimuovere
qualsiasi componente dallo Switch o di eseguire qualsiasi procedura di
manutenzione, leggere il documento 3Com Switch Family Safety and
Regulatory Information fornito con lo switch e l'Appendice E,

Power Supply Safety Information” on page 63

lesen.

“Redundant Power Supply Safety

“Redundant

.

OSTRZEŻENIE: Informacje o zabezpieczeniach. Przed zainstalowaniem lub
pozbyciem się jakiegokolwiek elementu z Przełącznika lub przeprowadzeniem
jakichkolwiek czynności konserwacyjnych, należy obowiązkowo przeczytać

3Com Switch Family Safety and Regulatory Information dołączone do

16 CHAPTER 2: INSTALLING THE SWITCH

przełącznika oraz w Załączniku E, “Redundant Power Supply Safety Information”

on page 63.

CAUTION: Opening the switch or tampering with the warranty sticker can void
your warranty.

ATTENTION : le fait d’ouvrir le commutateur ou d’altérer la vignette de garantie
pourrait rendre la garantie nulle.

WARNUNG: Öffnen des Switches oder Manipulation des Garantieaufklebers kann
das Erlöschen der Garantie zur Folge haben.

PRECAUCIÓN: si se abre el conmutador o se manipula el adhesivo de la garantía,
ésta quedará invalidada.

ATTENZION E: L'apertura dello switch o la manomissione dell'adesivo di garanzia
può invalidare la garanzia.

OSTRZEŻENIE: Otwarcie przełącznika lub naruszenie plomby gwarancyjnej
może unieważnić gwarancję

.

Package Contents ■ Switch unit

■ Unit Information Labels

■ Download Notice Flyer

■ Warranty Information

■ Power Cord

■ Console Cable (RJ-45)

■ 2 x Mounting brackets

■ 4 x Screws

■ 4 x Rubber feet

Rack-mounting the Switch

The Switch 4200G is 1 rack unit (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 front of

the Switch, as shown in Figure 7.

You can also rack mount your switch using the mounting holes at the rear of the
switch.

Rack-mounting the Switch 17

Figure 7 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 step 2 and step 3 for the other side of the switch.

Mounting the rear

bracket

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 Place a unit information label on the unit in an easily accessible position. The unit

information label shows the following:

■ 3Com switch product name

■ 3Com switch 3C number

■ The switch’s unique MAC address (Ethernet address)

■ The switch’s serial number

You may need this information if you contact 3Com Technical Support.

Mount a screw on the back of the switch to closely connect the switch with the
rear bracket to support the switch. There are three positions for mounting the
screw as shown in Figure 8.

18 CHAPTER 2: INSTALLING THE SWITCH

Three positions for screw mountingThree positions for screw mounting

Screw 1

Screw 2

Rear bracket

Rear mount
angle

Screw 1

Screw 2

Rear bracket

Rear mount
angle

Figure 8 Positions for mounting the screw on the switch

Follow the steps below to mount the rear bracket:

1 Use screws to fix the rear bracket to the rear mount angle.

2 Determine the position for mounting the screw on the switch according to the

position of the mount angle.

3 Mount the screw to the switch and make sure the screw and the rear bracket are

closely connected.

Figure 9 Installation completed 1

Screw 1: Fix the rear bracket to the mount
angle.

Screw 2 is mounted to the switch.

Figure 10 Installation completed 2

Screw 2

Screw 1

Rear mount angle

Rear bracket

Screw 2

Screw 1

Rear mount angle

Rear bracket

The Power-up Sequence 19

The Power-up Sequence

Powering-up the Switch

4200G

Checking for Correct

Operation of LEDs

Screw 1: Fix the rear bracket to the mount
angle.

Mount screw 2 to the switch.

The following sections describe how to powered-up your Switch 4200G and
prepare it for operation.

To power up the switch, perform the following steps:

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 one minute.

During the Power On Self Test, all switch ports are disabled and the LEDs light up.
The PWR LED flashes green during the POST.

When the POST has completed, check the PWR LED to make sure that your switch
is operating correctly. Table 7 shows possible LED colors.

Tab l e 7 PWR LED Colors
Tab l e 8

Color State

Green The Switch is powered-up and operating normally.

Red The Switch has failed its Power On Self Test (POST).

Yellow flashing Some ports have failed POST

Off The Switch is not receiving power.

* You can still use the remaining ports that have passed the POST.

*

If there is evidence of a problem, see “Solving Problems Indicated by LEDs” on
page 44 for a list of suggested solutions.

20 CHAPTER 2: INSTALLING THE SWITCH

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.

SFP Operation The following section describes how to insert an SFP transceiver into an SFP port.

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

Approved SFP

Transceivers

Inserting an SFP

Transceiver

The following Gigabit Ethernet SFP transceivers are currently supported.

■ 3CSFP92 SFP (1000BASE-LX)

■ 3CSFP97 SFP (1000BASE-LH70)

■ 3CSFP93 SFP (1000BASE-T)

To access the latest list of approved SFP transceivers for your switch refer to the
3com web site at www.3com.com.

The SFP transceiver must have the following characteristics:

■ 1000BASE-LX SFP transceiver

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

■ 1000BASE-LH70 SFP transceiver

Use this transceiver to connect Gigabit Ethernet SFP ports on the Switch
directly to a single-mode fiber-optic cable.

■ 1000BASE-T SFP transceiver

This transceiver uses Category 5 copper cabling with RJ-45 connectors and
supports segment lengths of up to 100 m (328 ft).

If the SFP transceiver is faulty, it will not operate within the Switch. See “Solving
Hardware Problems” on page 44.

3Com recommends that you only use SFPs supplied by 3Com. If the SFP
transceiver is invalid it will not be recognized by the Switch.

Use the following sequence of steps to activate the SFP ports:

1 The SFP transceiver is keyed and there is only one way in which it can be installed

correctly. It is not necessary to power-down your Switch.

2 Hold the transceiver so that the connector is toward you and the product label is

visible. Ensure the wire release lever is closed (in the upright position).

3 Gently slide the transceiver into the SFP port until it clicks. If the transceiver does

not click into place, remove it, turn it over and re-insert.

4 Remove the plastic protective cover if fitted.

Connecting a Redundant Power Supply 21

Product
label

Suitable port
on host Switch

Figure 11 Inserting an SFP Transceiver

5 Use and appropriate cable to connect the transceiver to a suitable device.

6 Check the LEDs on the front of the Switch to ensure that it is operating correctly.

Refer to “LEDs” on page 11 for more information.

Removing an SFP

Transceiver

Connecting a Redundant Power Supply

If you wish to remove the transceiver (it is not necessary to power-down your
Switch):

1 Disconnect the cable from the transceiver.

2 Move the wire release lever downwards until it is pointing toward you.

3 Pull the wire release lever toward you to release the catch mechanism; the

transceiver will then easily slide out.

The Switch 4200G Family has a -48V DC Redundant Power Supply socket.

WARNING: Only properly trained and qualified personnel should install the
Redundant Power Supply (RPS).

WARNING: Make sure to read these instructions in conjunction with the RPS flyer
and the safety and installation instructions supplied with your RPS.

22 CHAPTER 2: INSTALLING THE SWITCH

WARNING: When powering any Switch 4200G from an RPS, make sure that the
unit is earthed (grounded) by either connecting the power cord to the unit or by
connecting the earth terminal on the rear of the unit to a reliable electrical earth
(or by connecting both). Ensure that the earth connection is made before
connecting the DC supply from the RPS.

3Com switches that support -48V DC RPS inputs, and are PoE enabled, can only
be powered by an RPS that complies with the isolation requirements of IEEE-Std

802.3af. This restriction does not apply to non PoE enabled switches.

WARNING: Do not use a standard 'positive-earthed' -48V redundant power
system suitable for use with telecommunications equipment with the 3Com
Power-over-Ethernet (PoE) network switches. In order to meet the IEEE 802.3af
(PoE) specification, the -48V output must be isolated from earth (ground) and
meet the isolation requirements in that specification.

WARNING: Any RPS must be approved as a SELV output in accordance with IEC
60950-1/UL 60950-1/EN 60950-1.

WARNING: The characteristics of the Switch 4200G DC supply input are provided
in Appendix A “Technical Specifications” on page 47.

Specifying the

Redundant Power

System

You can power the Switch 4200G using three methods:

■ AC Mains only — this does not offer any power redundancy. If the AC mains

supply or the AC power supply fails, the switch powers off.

■ AC Mains and -48V DC (primary supply) — the internal AC supply acts as

the backup in the event of a DC power failure.

■ DC only — the switch does not need an AC supply and the resiliency is

provided by the DC supply. This is useful in environments where only DC power
is available.

The RPS provides the following main benefits:

■ Power Redundancy — if a switch is powered from the main supply unit, a

failure of the internal power supply causes the switch to fail. You can avoid this
by connecting both the AC and DC RPS supplies to the switch. You can also
add redundancy to the DC power by using (N+1) DC power supplies to further
increase system availability.

■ Uninterruptable Power — you can easily connect and replace the RPS shelf

batteries, which further increases system availability.

3Com’s redundant power solution allows you to use any off-the-shelf -48V DC
RPS that meets the requirements defined in Appendix A “Technical Specifications”
on page 47.

For an approved vendor list, more details about purchasing the 3Com
recommended RPS, and a full set of requirements go to

http://www.3Com.com/RPS.

The 3Com recommended RPS generates -48V DC power using power supply units
(or rectifiers). The outputs of the rectifier(s) are connected together so that you
can increase the total -48V power available by adding rectifiers. For example, three

Connecting a Redundant Power Supply 23

1500W rectifiers can provide up to 4500W. Hot removal or insertion of a rectifier
does not affect the -48V DC output voltage.

Table 9 shows an example of the total power available from several 1500W
rectifiers.

A minimum of two rectifiers are required for each shelf to provide N+1 rectifier
redundancy.

Tab l e 9 Power Availability

Table 10

Rectifiers

1 2 3 4 5 6

No Rectifier
Redundancy

N+1 Rectifier
Redundancy

1500W 3000W 4500W 6000W 7500W 9000W

- 1500W 3000W 4500W 6000W 7500W

The unearthed -48V DC power distribution provides a mechanism to connect to
the Switch 4200G. The distribution consists of several circuit breakers and
connection terminals for the positive (common) and negative -48V outputs.
Individually connect each Switch 4200G to a circuit breaker terminal.

Connecting the Switch

to the Redundant Power

System

You can also connect a battery to battery terminals prior to the DC power
distribution to provide uninterrupted power and to be protected against the loss
of AC mains power.

3Com’s RPS solution uses -48V DC power distribution. The RPS system provides
bulk -48V DC power that is separately distributed several network switches.

Each RPS consists of a shelf that can house from one to six rectifiers, a Distribution
Module, and a Management Module.

When connecting the RPS to the switch, the circuit breaker and 2-core cables need
to be matched to the switch’s power rating. Table 11 shows the recommended
circuit breaker and cable rating for the Switch 4200G. The recommended cable
length should not exceed three metres (9.84 feet).

Table 11 Switch 4200G Circuit Breaker and Cable Ratings

Table 12

Circuit Breaker Minimum 2-Core Cable Diameter

Non PoE 6A C type 18 AWG (solid or stranded cable)

PoE 25A C type 12 AWG (solid or stranded cable)

WARNING: Make sure to follow the RPS Manufacturer’s recommendations when
connecting the cable to the RPS.

WARNING: Ensure that the circuit breaker in the RPS is in the open (off) position
when connecting the cable to the RPS and the cable and connector to the switch.

24 CHAPTER 2: INSTALLING THE SWITCH

+

-

NULL

-48 -60V;2.0A

100-240V;50/60Hz;1.0A

~

NULL

-48 -60V;2 0A

Null

+

-

Pinout

Cable Tie

WARNING: Ensure that the positive terminal on the switch is connected to the
positive (common) terminal of the RPS and that the negative terminal on the
switch is connected to the negative (circuit breaker) terminal of the RPS.

Figure 12 shows how to connect the power supply to the RPS socket in the back
of the switch. Use the cable tie supplied with your switch to support the cable in
the back of the RPS connector as shown in Figure 12.

Figure 12 RPS Connection to the Switch

Connecting the Earthing

Cable

When the RPS is connected to the switch, you can move the circuit breaker in the
RPS to the closed (on) position and the switch will be powered by the -48V DC
power.

The -48V DC power takes priority over the AC mains and powers the switch if it is
connected.

Use the earthing cable that accompanies your switch if the length is suitable.
Alternatively use the earthing cable specification as defined in Appendix A

“Technical Specifications” on page 47.

The earthing cable is only required if the switch is powered by the RPS only.

The recommended cable length should not exceed three metres (9.84 feet).

Connecting the Console Cable 25

RPS LED The RPS status LED on the front of the Switch 4200G indicates the status of the

RPS and AC supplies as shown in .

Table 13 RPS LED Colors

Color State

Green The AC and RPS supply is connected.

Yellow The AC supply has failed or is not connected. The RPS

supply is connected.

Off There is no RPS supply connected.

Using Power over

Ethernet

The Switch 4200G Power over Ethernet (PoE) units can supply power to any IEEE

802.3af compliant device through any of its front panel ports over a Category 5 or
Category 5e Ethernet cable. The same cable connects the device to the network.

The Switch 4200G units can supply power through the 10/100 ports only.

Power over Ethernet is a self-configuring protocol. When you plug a PoE
compliant device into one of the ports on the switch, the switch supplies the
power required to the device, providing that the total power budget for the switch
is not exceeded.

A PoE switch combines the functionality of a standard Ethernet switch with a
single power supply that can power multiple devices. Using a PoE switch has the
following advantages over an non-powered network.

■ Reduced Cabling — a PoE (802.3af) compliant device that has its power

supplied over its Ethernet cable does not require a separate power supply. If,
for example, you use the switch to connect a 3Com 11 Mbps Wireless LAN
Access Point 8500 to the network, then only a network cable is required to
provide both power and network connectivity.

■ Increased Reliability — a device powered by a PoE switch can take advantage

of the facilities available to the switch. You can fit the switch with a redundant
power supply or uninterruptible power supply to increase its uptime.

Connecting the Console Cable

The switch supports resistor detection according to IEEE 802.3af and pre-standard
detection methods.

The Switch 4200G supports 3Com 802.3af equipment. For the latest list of
supported devices, refer to the product page on the 3Com web site at

http://www.3com.com/

For additional information on Power over Ethernet, refer to the Power over
Ethernet Configuration chapter in the Configuration Guide available on the 3Com
Web site. Power over Ethernet management is available using the web interface or
the command line interface (CLI).

A Console cable is an 8-core cable. One end of the cable is a crimped RJ-45
connector for the connection to the Console port of the switch, and the other end

26 CHAPTER 2: INSTALLING THE SWITCH

is a DB-9 female connector for the connection to the serial port on the Console
terminal, as shown in Figure 13.

Figure 13 Console cable

Table 14 Console cable pinouts

RJ-45 Signal Direction DB9 (console)

1 RTS

2 DTR

3 TXD —> 2

4 CD

5 GND — 5

6 RXD <— 3

7 DSR

8 CTS

When you want to use the terminal to configure the switch, follow these steps to
connect a terminal device to your switch using console cables:

1 Plug the DB-9 female connector of the Console cable to the serial port of the PC

or terminal where the switch is to be configured.

2 Connect the RJ-45 connector of the Console cable to the Console port of the

switch.

CAUTION: Pay attention to the mark on the Console port and be sure to plug the
connector to the right port.

If the switch is powered on:

■ First connect the DB-9 connector of the Console cable to the PC before

connecting the RJ-45 connector to the switch.

■ Disconnect the DB-9 connector of the Console cable from the PC after

disconnecting the RJ-45 connector from the switch.

3

SETTING UP SWITCH MANAGEMENT

To make full use of the features offered by your Switch 4200G, and to change and
monitor the way it works, you have to access the management software that
resides on the switch. Managing the switch can help you to improve its efficiency
and therefore the overall performance of your network.

This chapter explains the how to set up the switch and the various methods of
accessing the management software to manage the switch. It covers the following
topics:

■ Methods of Managing a Switch

■ Setting Up Your Switch

■ Manually Configuring IP Information

■ Viewing Automatically Configured IP Information

■ Setting Up Command Line Interface Management

Methods of Managing a Switch

Command Line Interface

Management

■ Setting Up Command Line Interface Management using SSH

■ Setting Up Web Interface Management

■ Setting Up SNMP Management

■ Default Users and Passwords

You can manage your switch using the:

■ Command line interface

■ Command line interface using SSH

■ Web interface

■ SNMP

Each switch has a command line interface (CLI) that allows you to manage the
switch from a workstation, either locally using a console port connection (see
Figure 14), or remotely over the network (see Figure 15).

28 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Console Port

Connection

Workstation

(with terminal emulation

software installed)

Console Cable

Switch

Switch

Workstation

Connect over Network

via Telnet

Workstation

Switch

Connect over Network

via web browser

Figure 14 CLI Management using the Console Port

Figure 15 CLI Management over the Network

Refer to “Setting Up Command Line Interface Management” on page 38.

There are two main views in the CLI:

Command Line Interface

Management using SSH

Web Interface

Management

■ User View

This view is displayed when you first connect to the switch and shows basic
information about its operation and statistics. The prompt for user view is
<S4200G>.

■ System View

This view enables you to configure the system parameters. To display this view,
from user view enter system-view. The prompt for system view is
[S4200G].

The Switch 4200G supports Secure Shell version 1.5 (SSHv1.5), allowing secure
access to the switch’s command line interface.

If you use SSH to administer your switch and the network traffic is intercepted, no
passwords or configuration information will be visible in the data. To securely
administer the switch using the command line interface you need a third party
SSH client.

Each switch has an internal set of web pages that allows you to manage the
switch using a Web browser remotely over an IP network (see Figure 16).

Figure 16 Web Interface Management over the Network

Refer to “Setting Up Web Interface Management” on page 40.

Setting Up Your Switch 29

SNMP Network Management

Workstation

Switch

Connect over Network

using SNMP

SNMP Management You can manage a switch using any network management workstation running

the Simple Network Management Protocol (SNMP) as shown in Figure 17. For a
description of 3Com network management applications, refer to “3Com Network
Management” on page 55.

Figure 17 SNMP Management over the Network

Refer to “Setting Up SNMP Management” on page 41.

Setting Up Your Switch

This section provides 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 setup process is
summarized in Figure 18. Detailed 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.

30 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Plug and Play Setup

Initial IP Information Set up

Feature Management

Power Up the Switch.

IP Information is automati cally configured

using DHCP
See page 31

Do you want to manually

configure the IP information?

Connect to the con­sole port and use the
Command Line Inter-

face.

See page 32

How do you want to manage your Switch? See page 27

SNMP

See page 41

Command Line Interface

Connect using the

console port.

See page 38

Web Interface

Connect over the

network using Telnet.

See page 38

Connect over the

network.

See page 40

How do you want to view the automatically

configured IP information?

How do you want to connect to the Switch?

Connect to a front panel port
and use the Web Interface or

Command Line

Interface.

See page 32

Use 3Com Network

Director (3ND).

See page 37

Connect to the console

port and use the

Command Line

Interface.

See page 37

Yes

No

Figure 18 Initial Switch Setup and Management Flow Diagram

IP Configuration You can use one of the following methods to configure IP information for your

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 41.

switch. This is essential if you wish to manage your switch across the network.

Configuring IP Manually

When you configure the IP information, the switch retains the information that
you enter until you change it again. You should configure manually configure the
IP address if:

■ You do not have a DHCP or BootP server on your network.

■ You want to remove the risk of the IP address ever changing.

■ 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 assigned
the same IP information.)

Setting Up Your Switch 31

For most installations, 3Com recommends that you manually configure the
switch’s IP information. 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.

To manually enter IP information for your switch, follow the instructions in
“Manually Configuring IP Information” on page 32.

Automatically Configuring the IP Address using DHCP

By default, the switch attempts to configure its IP Information by obtaining an IP
address from a DHCP server on the network.

When using automatic IP configuration it is important that the switch’s IP address
is static, otherwise you will not know what the IP address is and it will be difficult
to manage that switch. Most DHCP servers allow you to configure static IP
addresses. Refer to the DHCP server’s documentation for instructions.

For a detailed description of how automatic IP configuration operates on the
Switch 4200G, refer to the Configuration Guide available in PDF format on
3Com’s Web site at www.3com.com.

Preparing to Manage

Your Switch

You should use DHCP to automatically configure the IP address infomration if:

■ Your network uses DHCP to allocate IP information.

■ Flexibility is needed. If the switch is deployed on a different subnet, it will

automatically reconfigure itself with an appropriate IP address. You will not
have to manually reconfigure the switch.

If the switch is not allocated an automatic IP address, the IP configuration will be
blank or shown as ‘’’’.

If you use the automatic IP configuration method, you need to discover the
automatically allocated IP information before you can begin managing the switch.
Follow the instruction in “Viewing Automatically Configured IP Information” on
page 37.

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 27.

For detailed information about the specific web interface functions, the command
line interface, and problem solving, refer to the “Switch 4200G Command
Reference Guide” available in PDF format on 3Com’s Web site at www.3com.com.

32 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Console Port

Connection

Workstation

(with terminal emulation

software installed)

Console Cable

Switch

Manually Configuring IP Information

Connecting to the

Console Port

You can manually configure the switch’s IP information by:

■ connecting a workstation to the switch’s console port using a console cable.

You can then manually enter the IP information using the command line
interface (CLI).

■ connecting a workstation to one of the port’s on the switch’s front panel using

an Ethernet cable. You can then manually enter the IP information using the
web interface or the command line interface.

To set up your switch manually you can make a connection to the console port,
(this example describes a local connection to the console port, rather than one
using a modem). You can do this while the switch is off line, before you connect
the switch to a network, or while the switch is connected to a network.

Prerequisites

■ A workstation with terminal emulation software such as Microsoft

Hyperterminal. This software allows you to communicate with the switch
directly through the console port.

■ Documentation supplied with the terminal emulation software.

■ The console cable (RJ-45) supplied with your switch.

You can find pin-out diagrams for the cable in Appendix DB on page 59.

■ IP information including the:

■ IP address

■ subnet mask

■ default gateway

■ management VLAN ID, normally set to the default value (1)

Connecting the Workstation to the Switch

1 Connect the workstation to the console port using the console cable as shown in

Figure 19.

Figure 19 Connecting a Workstation to the Switch using the Console Port

To connect the cable:

a Attach the RJ-45 connector on the cable to the switch’s console port.
b Attach the other end of the cable to the workstation and tighten the retaining

screws on the cable to prevent it from being loosened.

2 Open your terminal emulation software and configure the settings for the COM

port to which you have connected the cable. The settings must be set to match
the switch’s default settings, which are:

■ 19,200 baud (bits per second)

Manually Configuring IP Information 33

■ 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.

3 Power up the switch. The Power on Self Test (POST) runs automatically.

Setting Up the Switch with IP Information

To manually set up the switch with IP information using the command line
interface, perform the following steps:

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 Enter a few times until it
starts.

2 At the login and password prompts, enter

admin as your user name and press

Enter. At the password prompt press Enter again. If you have logged on correctly,

<S4200G> is displayed as shown in .

You automatically log on in User View as shown bellow.

****************************************************************************
* Copyright(c) 2004-2007 3Com Corp. and its licensors. All rights reserved.*
* Without the owner's prior written consent, *
* no decompiling or reverse-engineering shall be allowed. *
****************************************************************************

Login authentication

Username:admin
Password:
<4200G>
%Apr 1 18:59:35:468 2000 4200G SHELL/5/LOGIN:- 1 - admin(10.1.1.15) in unit1
login

34 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

3 Enter the system-view command and press Enter. The [S4200G] prompt is

displayed.

4 Enter interface vlan 1 and press Enter.

5 Enter the IP address and subnet mask for the switch as follows:

ip address xxx.xxx.xxx.xxx mmm.mmm.mmm.mmm

(where xxx.xxx.xxx.xxx is the switch’s IP address and mmm.mmm.mmm.mmm is
the subnet mask) and press Enter.

6 Choose quit and enter the switch’s default gateway:

ip route-static 0.0.0.0 0.0.0.0 xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the default gateway)

7 From the User View, type save to save the switch’s configuration (this information

is not saved automatically when the switch is powered down).

You can now set up your chosen management method. See “Methods of
Managing a Switch” on page 27.

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

Connecting to a Front

Panel Port

To set up your switch manually you can, alternatively, make a connection to a front
panel port. You need an IP address to do this. Refer to “Viewing Automatically
Configured IP Information” on page 37 for more information.

The procedure described in this section assumes the unit is powered up in
standalone mode.

Prerequisites

■ A workstation running a suitable operating system—refer to “Choosing a

Browser” on page 40.

■ A Network Interface Card (NIC).

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

■ A suitable Web browser—refer to “Choosing a Browser”on page 40.

■ An existing IP address.

■ The switch’s IP information, including the:

■ IP address

■ subnet mask

■ default gateway

■ management VLAN ID, normally set to the default value (1)

Manually Configuring IP Information 35

Front Panel

Port Connection

Ethernet Cable

Workstation

(with a Network

Interface Card

installed)

Switch

Connecting the Workstation to the Switch

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

Figure 20.

Figure 20 Connecting a Workstation to the Switch through 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

switch’s front panel ports.

Do not interconnect the switch to any other unconfigured switch.

Setting Up the Switch with IP Information

You can now manually set up the switch with its IP information using the Web
interface or the command line interface (CLI) using telnet.

Using the Web Interface

1 Power-up the switch. This takes approximately one minute.
2 Open a suitable Web browser and enter your switch’s IP address in the Address

field.

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

If a pop up message appears displaying download and install simplified Chinese
information, click Cancel.

3 At the login prompt, enter admin as your user name and press Enter and at the

password prompt press Enter again. If you have logged on correctly, the Device
View of the switch is displayed.

4 To enter basic setup information for the switch, select Administration > IP Setup

and then follow the wizard through various screens to enter the IP address and
subnet mask that you want the switch to use when it is connected to the network.
The final page displays a summary of the information entered.

5 Select Save Configuration to save the configuration to your switch.

The initial set up of your switch is now complete and you can now set up your
chosen management method. See “Methods of Managing a Switch” on page 27.

36 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Using Command Line Interface with Telnet

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

a Click Run.
b In Open field, type the unit’s IP address:

Telnet xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the switch’s IP address)

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 prompt, enter admin as your user name and press Return at the

password prompt. If you have logged on correctly, <S4200G> is displayed as
shown in the example in Figure 21.

Figure 21 Logging into User View using Telnet

4 Enter the system-view command and press Enter.
5 Enter interface vlan 1 and press Enter.

6 Enter the IP address and subnet mask for the switch:

ip address xxx.xxx.xxx.xxx mmm.mmm.mmm.mmm

(where xxx.xxx.xxx.xxx is the IP address and mmm.mmm.mmm.mmm is the
switch’s subnet mask)

7 Enter a default gateway for the switch:

ip route-static 0.0.0.0 0.0.0.0 xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the default gateway)

8 FEnter the save command to save the configuration to your switch as the

configuration is not saved automatically when the switch is powered down.

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 27.

Viewing Automatically Configured IP Information 37

Viewing Automatically Configured IP Information

Using 3Com Network

Director

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 by:

■ Using 3Com Network Director to auto-discover the switch and display the its

automatically allocated IP information.

■ Connecting a workstation to the switch’s console port using a console cable,

then using the command line interface to view its automatically assigned IP
information.

Each method is described in detail below.

You can use the 3Com Network Director application (available from the 3Com
website) 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 Director and run the Auto-discovery wizard. 3Com

Network Director automatically discovers the new switch and displays the its
automatically assigned IP information.

Most DHCP and BootP servers allow you to configure static IP addresses so that
you know what the switch’s IP address is. Refer to the documentation that
accompanies your DHCP or BootP serverfor more informaiton.

Connecting to the

Console Port

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

You can also view the automatically configured IP information using 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 using a
modem.) For further information on connecting using the console port see
“Connecting the Workstation to the Switch”on page 32.

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.

2 The CLI 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 prompt, enter

admin as your user name and press Return at the

password prompt. If you have logged on correctly, <S4200G> is displayed as
shown in the example in Figure 22.

38 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Figure 22 User View Login

4 Enter display ip interface br to view a summary of allocated IP

addresses.

The initial set up of your switch is now complete and you can set up your chosen
management method. See “Methods of Managing a Switch” on page 27.

If you do not intend to use the CLI from the console port to manage the switch,
you can logout, disconnect the serial cable, and close the terminal emulator
software.

Setting Up Command Line Interface Management

CLI Management using

the Console Port

CLI Management over

the Network

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

You can configure and manage the Switch 4200G’s port data through its two user
interfaces:

■ Use the AUX User Interface to log in to your switch using the console port.

■ Use the VTY User Interface to Telnet to the switch. The switch can have up to

five VTY user interfaces.

To manage your switch using the command line interface from the local console
port connection, ensure that your workstation is connected to the console port as
described in “Connecting to the Console Port” on page 32.

To manage your switch using the command line interface over a network using
Te ln e t:

1 Ensure that you have already set up the swwitch with IP information as described

in “Methods of Managing a Switch” on page 27.

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, then the IP protocol is installed.

3 Check that 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 switch’s IP address)

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

Setting Up Command Line Interface Management using SSH 39

4 To open a Telnet session using 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 switch’s IP address)

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

Setting Up Command Line Interface Management using SSH

5 At the login prompt, 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
defaults).

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

6 If you have logged on correctly, the Switch you wish to manage is displayed as

<S4200G>, as shown in on page 33.

To manage a switch using the command line interface over a network with SSH:

1 Ensure that you have already set up the switch with IP information as described in

“Methods of Managing a Switch” on page 27.

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

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

3 Check that 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 switch’s IP address)

If you receive an error message, check that your IP information was entered
correctly and the switch is powered up.

The switch automatically generates a host key pair when it is powered up for the
first time, or after it is reset to the factory defaults. Host key generation may take
a while, during which time SSH connections to the switch are rejected.

4 Install an SSH client application on the workstation you want to use to access the

switch.

3Com recommends the PuTTY, OpenSSH, and SSH Communications Security Corp
Secure Shell SSH clients.

5 Open an SSH session and access the switch using the its IP address and port

number.

The first time you connect to the switch, the client prompts you to confirm that
the host key is correct for the device.

6 The switch and the SSH client authenticate each other and a secure connection is

established.

7 Enter your usual username and password to access the CLI commands.

40 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

For increased security change the default password when using SSH for the first
time.

For further information on generating a host key on your switch and transferring
keys to the switch using TFTP server, refer to the Configuration Guide that is
supplied with your switch.

Setting Up Web Interface Management

Prerequisites

Table 22-1

Netscape 7.1

Internet Explorer 5.5

Internet Explorer 6.0

Mozilla 1.4

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

■ Ensure that you have already set up the switch with its IP information as

described in “Methods of Managing a Switch” on page 27.

■ 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 browsers and
platform combinations:

Table 15 Supported Web Browsers and Platforms

Windows

2000

Windows XP

Windows

Server 2003

Red Hat

Linux 9

Solaris

7/9

✓ ✓ ✕ ✕ ✓

✓ ✓ ✓ ✕ ✕

✓ ✓ ✓ ✕ ✕

✕ ✕ ✕ ✓ ✓

Web Management Over

the Network

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 need only enable them if you changed your
browser settings.

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 that 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 switch’s IP address)

If you receive an error message, check that your IP information was entered
correctly and that the awitch is powered up.

Setting Up SNMP Management 41

3 Open your Web browser and enter the IP address of the switch that you wish to

manage in the URL locator in the following format:

http://xxx.xxx.xxx.xxx

4 At the login prompt, 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 password).

5 Click on the Device View to display the Web management options.

Setting Up SNMP Management

Prerequisites

Any network management application running the Simple Network Management
Protocol (SNMP) can manage a switch if the management workstation is
connected to the switch using a port on the management VLAN. By default, the
management VLAN is 1, and all ports on the switch are in VLAN 1.

For a description of 3Com’s network management applications, see “3Com
Network Management” on page 55.

■ The default read community string is public. The default write community

string is private.

■ To display the current configuration of the community strings in the System

View, enter display snmp-agent community.

■ To configure new read community strings, enter snmp community read

(new community string up to 32 characters).

■ To configure new write community strings, enter snmp community write

(new community string up to 32 characters).

■ To remove a community string, enter undo snmp-agent community (the

string to be removed).

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 Switch
4200G Command Reference Guide” for more information.

Default Users and Passwords

These switches support SNMP V1, V2, and V3. SNMP V3 is the default. All
commands are in the snmp menu in System View.

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
Ta bl e 1 6.

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.

42 CHAPTER 3: SETTING UP SWITCH MANAGEMENT

Table 16 Default Users
Table 17

User
Name

monitor monitor monitor

manager manager manager

admin (no

Default
Password

password)

Use the admin default user name (no password) to login and initially set up the
switch.

To set a password for the admin user in the CLI, enter the following from system
view:

Access Level

This user can view all manageable parameters except
special/security features, but cannot change any manageable
parameters

This user can access and change the operational parameters
but not special/security features

security

This user can access and change all manageable parameters

[S4200G]local-user admin <cr>
[S4200G-luser-admin]password simple xxxxxxxx

(where xxxxxxxx is your chosen password).

Save the configuration in the User View.

For information about the lost password procedure refer to the “Switch 4200G
Configuration Guide” available at www.3Com.com.

4

PROBLEM SOLVING

This chapter helps you to diagnose and solve problems you may have with the
operation of your switch and provides a description of IP addressing and
upgrading software.

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 Switch 4200G Command Reference Guide available in PDF
format on 3Com’s Web site at www.3com.com.

For Technical Support information, see Appendix B.

44 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 PWR 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. First 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 PWR LED lights Red

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.

On powering-up, the PWR LED is flashing yellow

A port has failed and has been automatically disabled. You can verify this by
checking that the Port LED is quickly flashing Yellow. If a port fails, the switch
passes its Power On Self Test and continues to operate normally.

A Port LED is flashing yellow

The port has failed and has been automatically disabled. The switch passes its
Power On Self Test and continues to operate normally, even if one or more ports
are disabled.

A link is connected and yet the Port LED 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 10BASE-T or 100BASE-T where
auto-negotiation is disabled and incorrect cables are being used (cross-over or
straight).

Auto-negotiation problems 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

In the rare event that your switch unit experiences a hardware failure, refer to the
list of suggested solutions below.

Solving Hardware Problems 45

A fan failure warning message is received

Your switch has a fan monitoring system that will generate fan failure warning
messages. Fan failure could potentially reduce the lifetime of the switch. The
monitoring system polls the fan status at periodic intervals while the unit is
powered up.

If one fan has failed in the switch, a warning message will be generated in the
following ways:

■ Unit LED

The seven segment display shows a green flashing ‘f’.

■ RMON Trap

If configured, an RMON trap is generated and sent to the management
workstation.

■ Command Line Interface

An indication of a general hardware failure is provided through the Top level
menu displayed when logging onto the CLI. For more detailed information
about the failure issue the display logbuffer command.

■ Web interface

An indication of fan failure is provided through the Device Summary table for
the specific unit. In addition all summary tables turn red to indicate the fan
failure.

If a fan failure warning message is generated:

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

another fan failure warning message is generated using the Command Line
Interface or the Web interface, return the unit to 3Com.

Unit fails, no SNMP fan failure message is received

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

2 Check the command line interface (display logbuffer command) to

determine whether a thermal shutdown has occurred. If not, return the unit. If it
has occurred, check that:

■ The air vents are not obstructed.

■ The ambient temperatures and environmental conditions meet those specified

in Appendix A.

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

conditions are satisfactory, return the unit to 3Com.

Error message indicating that the SFP transceiver is invalid

The switch has identified that the SFP does not meet the minimum requirements
for the switch and has disabled the port. To correct this problem, completely
remove the SFP and replace it with a 3Com approved SFP. See “Approved SFP
Transceivers” on page 20.

46 CHAPTER 4: PROBLEM SOLVING

Error message indicating that the SFP transceiver is faulty

To correct this problem, completely remove the SFP and then reinsert it.
Alternatively, insert another identical SFP. If the problem persists, contact 3Com
Technical Support.

Solving Communication Problems

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

■ The switch’s IP address and Management VLAN ID is configured.

■ 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 was entered correctly in your network management

application (such as 3Com Network Director).

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 a
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.
The IP address is split into two parts:

■ 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 is connected 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:

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 that you use addresses in the
range 192.168.0.0 to 192.168.255.255 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.

A

Switch 4200G 12-Port

TECHNICAL SPECIFICATIONS

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 –10 ° to +70 °C (14 ° to 158 °F)

Operating Humidity 95% non-condensing

Standards

Safety

Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No. 60950-1, IEC 60950-1.

EMC

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

Immunity EN 55024

Heat Dissipation 45 watts maximum (155 BTU/hour maximum)

Power Supply

AC

Line Frequency 50/60Hz

Input Voltage 100–240 VAC

Current Rating 1.5A (amps) maximum

Weight: 4.4kg (9.72 Ibs)

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, EN61000-3-2, EN61000-3-3

48 APPENDIX A: TECHNICAL SPECIFICATIONS

Switch 4200G 24-Port

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 –10 ° to +70 °C (14 ° to 158 °F)

Operating Humidity 95% non-condensing

Standards

Safety

Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No. 60950-1, IEC 60950-1.

EMC

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

Immunity EN 55024

Heat Dissipation 68 watts maximum (235 BTU/hour maximum)

Power Supply

AC

Line Frequency 50/60Hz

Input Voltage 100–240 VAC

Current Rating 1.5A (amps) maximum

Weight: 4.4kg (9.72 Ibs)

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, EN61000-3-2, EN61000-3-3

Switch 4200G (48-Port)

Switch 4200G (48-Port) 49

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 –10 ° to +70 °C (14 ° to 158 °F)

Operating Humidity 95% non-condensing

Standards

Safety

Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No. 60950-1, IEC 60950-1.

EMC

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

Immunity EN 55024

Heat Dissipation 116 watts maximum (395 BTU/hour maximum)

Power Supply

AC

Line Frequency 50/60Hz

Input Voltage 100–240 VAC

Current Rating 2.0A (amps) maximum

Weight: 4.7kg (10.9 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, EN61000-3-2, EN61000-3-3.

Switch 4200G PWR 24-Port

Physical Dimensions Height: 44 mm (1.7 in.) x Width: 440 mm (17.3 in.) x Depth: 430 mm (16.9 in.)

Environmental Requirements

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

Storage Temperature –10 ° to +70 °C (14 ° to 158 °F)

Operating Humidity 95% non-condensing

Standards

Safety

Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No. 60950-1, IEC 60950-1.

EMC

Weight: 6.9kg (15.2 Ibs)

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).

50 APPENDIX A: TECHNICAL SPECIFICATIONS

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

ICES-003 Class A, EN61000-3-2, EN61000-3-3

Immunity EN 55024

Heat Dissipation 80 watts maximum (275 BTU/hour maximum)

Power Supply

AC Input:

Line Frequency 50/60Hz

Input Voltage 100–240 VAC

Current Rating 8A (amps) maximum

DC Input:

Input Voltage -52 to -55 VDC

Current Rating 20A (amps) maximum

All 10/100/1000 System AC input: 130W + 370W PoE

ports serve power DC input: 636 W

as PoE ports consumption

(full load)

PoE power 15.4 W X 24

maximum

Related Standards The 3Com Switch 4200G Product Family is designed to the following

standards:

Function

Safety

EMC Emissions

EMC Immunity

8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE

802.3ab (Gigabit Ethernet), IEEE 802.1D (Bridging)

UL 60950-1, EN 60950-1, CSA 22.2 No. 60950-1, IEC 60950-1

EN55022 Class A, CISPR 22 Class A, FCC Part 15 Subpart B Class
A, ICES-003 Class A, VCCI Class A, EN61000-3-2, EN61000-3-3

EN55024

B

OBTAINING SUPPORT FOR YOUR
P

RODUCT

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 requests. 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.

52 APPENDIX B: 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 software 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 53

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. of China
Singapore
S. Korea
Taiwan
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

54 APPENDIX B: 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
Argentina
Aruba
Bahamas
Barbados
Belize
Bermuda
Bonaire
Brazil
Cayman
Chile
Colombia
Costa Rica
Curacao
Ecuador
Dominican Republic

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]

01 7956 7124
070 700 770
7010 7289
01080 2783
0825 809 622
01805 404 747
06800 12813
1407 3387
1800 945 3794
199 161346

1 800 988 2112
0 810 444 3COM
1 800 998 2112
1 800 998 2112
1 800 998 2112
52 5 201 0010
1 800 998 2112
1 800 998 2112
0800 13 3COM
1 800 998 2112
AT&T [phone]
AT&T [phone]
AT&T [phone]
1 800 998 2112
AT&T [phone]
AT&T [phone]

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

Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Nicaragua
Panama
Paraguay
Peru
Puerto Rico
Salvador
Trinidad and Tobago
Uruguay
Venezuela
Virgin Islands

342 0808128
0900 777 7737
815 33 047
00800 441 1357
707 200 123
0800 995 014
9 021 60455
07711 14453
08488 50112
0870 909 3266

AT&T [phone]
57 1 657 0888
AT&T [phone]
1 800 998 2112
571 657 0888
01 800 849CARE
AT&T [phone]
AT&T [phone]
54 11 4894 1888
AT&T [phone]
1 800 998 2112
AT&T [phone]
1 800 998 2112
AT&T [phone]
AT&T [phone]
57 1 657 0888

US and Canada Telephone Technical Support and Repair

1 800 876 3266

C

3COM NETWORK MANAGEMENT

3Com has a range of network management applications to address
networks of all sizes and complexity, from small and medium businesses
through large enterprises. The applications include:

■ 3Com Network Supervisor

■ 3Com Network Director

■ 3Com Network Access Manager

■ 3Com Enterprise Management Suite

■ Integration Kit with HP OpenView Network Node Manager

Details of these and other 3Com Network Management Solutions can be
found at www.3com.com/network_management

3Com Network Supervisor

3Com® Network Supervisor (3NS) is an easy-to-use management
application that graphically discovers, maps, and monitors the network
and links. It maps devices and connections so you can easily:

■ Monitor stress levels

■ Set thresholds and alerts

■ View network events

■ Generate reports in user-defined formats

■ Launch embedded device configuration tools

3NS is configured with intelligent defaults and the ability to detect
network misconfigurations. It can also offer optimization suggestions,
making this application ideal for network managers with all levels of
experience.

To find out more about 3Com Network Supervisor and to download a
trial version, go to: www.3com.com/3ns

56 APPENDIX C: 3COM NETWORK MANAGEMENT

3Com Network Director

3Com Network Access Manager

3Com Network Director (3ND) is a standalone application that allows you
to carry out key management and administrative tasks on midsized
networks. By using 3ND you can discover, map, and monitor all your
3Com devices on the network. It simplifies tasks such as backup and
restore for 3Com device configurations as well as firmware and agent
upgrades. 3ND makes it easy to roll out network-wide configuration
changes with its intelligent VLAN configuration tools and the powerful
template based configuration tools. Detailed statistical monitoring and
historical reporting give you visibility into how your network is
performing.

To find out more about how 3Com Network Director can help you
manage your 3Com network and to download a trial version, go to:

www.3com.com/3nd

3Com Network Access Manager is installed seamlessly into Microsoft
Active Directory and Internet Authentication Service (IAS). It simplifies the
task of securing the network perimeter by allowing the administrator to
easily control network access directly from the “Users and Computers”
console in Microsoft Active Directory. With a single click, a user (or even
an entire department) can be moved to a different VLAN, or a computer
can be blocked from connecting to the network.

3Com Network Access Manager leverages the advanced desktop security
capabilities of 3Com switches and wireless access points (using IEEE

802.1X or RADA desktop authentication) to control both user and
computer access to the network.

To find out more about 3Com Network Access Manager, go to:

www.3com.com/NAM

3Com Enterprise Management Suite 57

3Com Enterprise Management Suite

3Com Enterprise Management Suite (EMS) delivers comprehensive
management that is flexible and scalable enough to meet the needs of
the largest enterprises and advanced networks.

This solution provides particularly powerful configuration and change
control functionalities, including the capability to:

■ Customize scheduled bulk operations

■ Create a detailed audit trail of all network changes

■ Support multiple distributed IT users with varying access levels and

individualized network resource control

The client-server offering operates on Windows and UNIX (Linux and
Solaris) systems.

3Com EMS is available in four packages, varying in the maximum number
of devices actively managed. These include SNMP-capable devices such as
switches, routers, security switches, the 3Com VCX™ IP Telephony server,
and wireless access points:

■ Up to 250 devices

■ Up to 1,000 devices

■ Up to 5,000 devices

Integration Kit with HP OpenView Network Node Manager

■ An unlimited number of devices

To find out more about 3Com Enterprise Management Suite, go to:

www.3com.com/ems

3Com Integration Kit for HP OpenView Network Node Manager offers
businesses the option of managing their 3Com network directly from HP
OpenView Network Node Manager. The kit includes Object IDs, icons,
MIBs, and traps for 3Com devices. The package supports both Windows
platforms and UNIX or Solaris platforms. It can be installed as a
standalone plug-in to HP OpenView, or used with a 3Com management
application such as 3Com Enterprise Management Suite (EMS).

To find out more about 3Com Integration Kit for HP OpenView Network
Node Manager, go to: www.3com.com/hpovintkit

58 APPENDIX C: 3COM NETWORK MANAGEMENT

PIN-OUTS

D

Null Modem Cable RJ-45 to RS-232 25-pin

3Com Switch
Cable connector: RJ-45 female

Screen

TxD
RxD
Ground
RTS
CTS

DSR

DCD
DTR

Shell
3
2
5
7
8

6

1
4

PC-AT Serial Cable RJ-45 to 9-pin

3Com Switch
Cable connector: RJ-45 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

60 APPENDIX D: PIN-OUTS

Modem Cable RJ-45 to RS-232 25-pin

Ethernet Port RJ-45 Pin Assignments

3Com Switch
Cable connector: RJ-45 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
RT S
CTS
DSR

Ground

DCD
DTR

10/100 and 1000BASE-T RJ-45 connections.

Table 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-

Table 11 Pin assignments

Pin Number 10/100 1000

Ports configured as MDIX

1 Receive Data + Bidirectional Data B+

2 Receive Data - Bidirectional Data B-

Ethernet Port RJ-45 Pin Assignments 61

Pin Number 10/100 1000

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-

62 APPENDIX D: PIN-OUTS

REDUNDANT POWER SUPPLY

E

S

AFETY INFORMATION

Important Safety Information

WARNING: This device has more than one power input. Disconnect all
power inputs to power off this device.

WARNING: The installation of the Redundant Power Supply (RPS) should
only be carried out by properly trained and qualified personnel.

WARNING: These instructions must be read in conjunction with the RPS
flyer and the safety and installation instructions supplied with your RPS.

WARNING: When powering any Switch 4200G from an RPS, the unit
must be earthed (grounded). This can be achieved by either connecting
the power cord to the unit or by connecting the earth terminal on the
rear of the unit to a reliable electrical earth, or by connecting both. It
must be ensured that the earth connection is made before connecting
the DC supply from the RPS.

WARNING: Any RPS must be approved as an unearthed SELV output in
accordance with IEC 60950-1/UL 60950-1/EN 60950-1.

WARNING: RPS Manufacturers’ recommendations must be followed
when connecting the cable to the RPS.

WARNING: Ensure that the circuit breaker in the RPS is in the open (off)
position when connecting the cable to the RPS.

WARNING: You must ensure that the positive terminal on the Switch is
connected to the positive (common) terminal of the RPS and that the
negative terminal on the Switch is connected to the negative (circuit
breaker) terminal of the RPS.

64 APPENDIX E: REDUNDANT POWER SUPPLY SAFETY INFORMATION

WARNING: Ensure that the circuit breaker in the RPS is in the open (off)
position when connecting the RPS cable and connector to the Switch.

WARNING: Do not use a standard 'positive-earthed' -48V redundant
power system suitable for use with telecommunications equipment with
the 3Com Power-over-Ethernet (PoE) network switches. In order to meet
the IEEE 802.3af (PoE) specification, the -48V output must be isolated
from earth (ground) and meet the isolation requirements in that
specification.

L’information de Sécurité Importante

AVERTISSEMENT: Ce périphérique comporte plusieurs entrées
d'alimentation. Déconnectez toutes les entrées d'alimentation afin de le
mettre hors tension.

AVERTISSEMENT: L'installation du RPS (Redundant Power Supply) ne
doit être confiée qu'à un personnel formé et qualifié.

AVERTISSEMENT: Ces instructions doivent être lues conjointement avec
les instructions d'installation et les consignes de sécurité qui
accompagnent le RPS.

AVERTISSEMENT: Lorsqu'un commutateur Switch 4200G est alimenté
par un module RPS, l'unité doit être mise à la terre. Pour cela, branchez le
cordon d'alimentation à l'unité ou branchez la borne de mise à la terre
située à l'arrière de l'unité à une prise de terre fiable, ou procédez aux
deux raccordements. Assurez-vous que l'unité est mise à la terre avant de
raccorder l'alimentation CC du RPS.

AVERTISSEMENT: Le RPS doit être approuvé en tant que sortie SELV non
reliée à la terre, conformément à la norme IEC 60950-1/UL 60950-1/EN
60950-1.

AVERTISSEMENT: Ces instructions doivent être lues conjointement avec
les caractéristiques de l'alimentation CC du Switch 4200G fournies en
annexe C, Spécifications techniques.

AVERTISSEMENT: Vous devez respecter les recommandations du
fabricant lors du branchement du câble au module RPS.

L’information de Sécurité Importante 65

AVERTISSEMENT: Assurez-vous que le disjoncteur du RPS est ouvert (off)
lors du branchement du câble au RPS.

AVERTISSEMENT: Assurez-vous de brancher la borne positive du
commutateur à la borne positive (commune) du RPS, et la borne négative
du commutateur à la borne négative (disjoncteur) du RPS.

AVERTISSEMENT: Assurez-vous que le disjoncteur du RPS est ouvert (off)
lors du branchement du câble et du connecteur du RPS au commutateur
3Com.

AVERTISSEMENT : N’utilisez pas de système standard d’alimentation
redondante à 48 V relié à la terre convenant aux équipements de
télécommunication avec les commutateurs réseau PoE
(Power-Over-Ethernet) de 3Com. En vue de respecter la spécification IEEE

802.3af (PoE), la sortie 48 V doit être isolée de la terre (masse) et se
conformer aux exigences d’isolation de cette spécification.

66 APPENDIX E: REDUNDANT POWER SUPPLY SAFETY INFORMATION

Wichtige Sicherheitsinformationen

VORSICHT: Dieses Gerät besitzt mehrere Eingänge zur Stromversorgung.
Trennen Sie das Gerät zum Ausschalten von allen Stromquellen.

VORSICHT: Die RPS (Redundant Power Supply, redundante
Stromversorgung) darf nur von entsprechend geschultem und
qualifiziertem Fachpersonal installiert werden.

VORSICHT: Diese Anleitungen müssen im Zusammenhang mit den
Sicherheitshinweisen und Installationsanleitungen zu Ihrer RPS gelesen
werden.

VORSICHT: Bei der Stromversorgung eines Switch 4200G über eine RPS
muss das Gerät geerdet sein. Hierfür kann entweder das Netzkabel an
das Gerät angeschlossen werden oder die Erdungsklemme an der
Rückseite des Geräts mit einer zuverlässigen elektrischen Erdung
verbunden werden oder beides. Es ist sicherzustellen, dass die
Erdungsverbindung vor dem Anschließen der von der RPS bereitgestellten
Gleichstromversorgung hergestellt wird.

VORSICHT: Jede RPS muss als nicht geerdetes SELV-Ausgangsgerät
gemäß IEC 60950-1/UL 60950-1/EN 60950-1 zugelassen sein.

VORSICHT: Diese Anleitungen müssen im Zusammenhang mit den
Eigenschaften des Gleichstrom-Versorgungseingangs des Switch 4200G
gelesen werden, die in Anhang C, "Technische Daten", aufgeführt sind.

VORSICHT: Beim Anschließen des Kabels an die RPS sind die
Empfehlungen des Herstellers zu beachten.

VORSICHT: Stellen Sie sicher, dass sich der Schutzschalter an der RPS
beim Anschließen des Kabels an die RPS in der geöffneten Stellung (Aus)
befindet.

VORSICHT: Stellen Sie auf jeden Fall sicher, dass die positive Klemme am
Switch an die positive (gemeinsame) Klemme der RPS und die negative
Klemme am Switch an die negative (gemeinsame) Klemme der RPS
angeschlossen wird.

VORSICHT: Stellen Sie sicher, dass sich der Schutzschalter an der RPS
beim Anschließen des RPS-Kabels und des Steckers des 3Com Switch in
der geöffneten Stellung (Aus) befindet.

VORSICHT: Verwenden Sie mit den 3Com PoE-Netzwerkswitches kein
"positiv geerdetes" redundantes Standard-Netzsystem mit -48 Volt, wie
es für Telekommunikationsgeräte geeignet ist. Um den IEEE 802.3af
(PoE)-Spezifikationen zu entsprechen, muss der -48 Volt Ausgang erdfrei
sein und die Isolierungsanforderungen dieser Spezifikation erfüllen.

Información de Seguridad Importante

ADVERTENCIA: Este dispositivo dispone de más de una entrada de
alimentación. Desconecte todas las entradas de alimentación del
dispositivo.

ADVERTENCIA: La instalación del sistema de alimentación superflua
(RPS) sólo debería llevarla a cabo personal cualificado y con la debida
formación.

Información de Seguridad Importante 67

ADVERTENCIA: Estas instrucciones deben leerse junto con las
instrucciones de instalación y seguridad que se facilitan con el sistema
RPS.

ADVERTENCIA: al encender cualquier Switch 4200G desde un RPS, la
unidad debe contar con una toma de tierra (conexión a tierra). Esto se
puede conseguir conectando el cable de alimentación de la unidad o bien
conectando el terminal de tierra en la parte posterior de la unidad a una
toma de tierra fiable, o conectando ambas. Deberá asegurarse de que la
conexión a tierra se realiza antes de conectar el suministro de CC del RPS.

ADVERTENCIA: Todos los RPS deben estar homologados como salidas
SELV sin toma de tierra según IEC 60950-1/UL 60950-1/EN 60950-1.

ADVERTENCIA: Estas instrucciones deben leerse junto con las
características de la entrada de suministro de CC del Switch 4200G del
Apéndice C, Especificaciones técnicas.

ADVERTENCIA: al conectar el cable al RPS deberán seguirse las
recomendaciones del fabricante.

68 APPENDIX E: REDUNDANT POWER SUPPLY SAFETY INFORMATION

ADVERTENCIA: asegúrese de que el disyuntor del RPS se encuentra en la
posición de abierto (desactivado) al conectar el cable al RPS.

ADVERTENCIA: deberá asegurarse de que el terminal positivo del Switch
está conectado al terminal positivo (común) del RPS, y de que el terminal
negativo del Switch está conectado al terminal negativo (disyuntor) del
RPS.

ADVERTENCIA: asegúrese de que el disyuntor del RPS se encuentra en la
posición de abierto (desactivado) al conectar el cable del RPS y el conector
al Switch 3Com.

ADVERTENCIA: No utilice un sistema de alimentación eléctrica
redundante de -48 V con conexión a tierra positiva, adecuado para su uso
con equipos de telecomunicaciones, con los conmutadores de red
alimentados a través de Ethernet (PoE) de 3Com. Para cumplir con la
especificación IEEE 802.3af (PoE), la salida de -48V debe estar aislada de
la de tierra y cumplir con los requisitos de aislamiento de dicha
especificacion.

Importanti Informazioni di Sicurezza

AVVERTENZA: Il dispositivo presenta più punti di alimentazione. Per
spegnere il dispositivo, scollegare tutti i punti di alimentazione.

AVVERTENZA: le operazioni di installazione dell'RPS (Redundant Power
Supply) devono essere eseguite esclusivamente da personale qualificato e
opportunamente addestrato.

AVVERTENZA: queste istruzioni devono essere lette insieme alle
istruzioni di sicurezza e installazione fornite con l'RPS.

AVVERTENZA: se si accende uno Switch 4200G da un RPS, l'unità deve
disporre di messa a terra. Per accendere lo switch, è possibile collegare il
cavo di alimentazione all'unità, collegare il terminale di terra situato sul
retro dell'unità a una presa elettrica di terra sicura oppure collegarli
entrambi. Prima di collegare l'alimentazione CC dell'RPS, è necessario
verificare la messa a terra.

Wa¿ne informacje o zabezpieczeniach 69

AVVERTENZA: tutti gli RPS devono essere approvati come dispositivi di
uscita SELV non messi a terra in conformità con le norme IEC 60950-1/UL
60950-1/EN 60950-1.

AVVERTENZA: queste istruzioni devono essere lette insieme ai valori di
ingresso dell'alimentazione CC dello Switch 4200G che vengono forniti
nell'Appendice C, Specifiche tecniche.

AVVERTENZA: quando si collega il cavo all'RPS, si consiglia di rispettare
le raccomandazioni fornite dal fabbricante.

AVVERTENZA: durante il collegamento del cavo all'RPS, verificare che il
salvavita dell'RPS si trovi in posizione Acceso (spento).

AVVERTENZA: è necessario verificare che il polo positivo sullo switch sia
collegato al polo positivo (comune) dell'RPS e che il polo negativo sullo
switch sia collegto al polo negativo (salvavita) dell'RPS.

AVVERTENZA: prima di collegare il cavo RPS e il connettore allo switch
3Com, verificare che il salvavita si trovi in posizione Acceso (spento).

AVVERTENZA: Non usare con gli switch di rete PoE
(Power-over-Ethernet) di 3Com sistemi di alimentazione ridondante
standard con 'messa a terra positiva' a -48 V normalmente usati con gli
apparecchi di telecomunicazione. Per soddisfare lo standard IEEE 802.3af
(PoE), l'uscita a -48V deve essere isolata da terra e soddisfare i requisiti
d'isolamento per quello standard.

Ważne informacje o zabezpieczeniach

OSTRZEŻENIE: To urz ądzenie ma kilka punktów podłączenia zasilania.
Aby wyłączyć urządzenie, należy odłączyć wszystkie punkty zasilania.

OSTRZEŻENIE: Instalacja zasilacza nadmiarowego (RPS) powinna być
wykonywana przez odpowiednio przeszkolony i wykwalifikowany person­el.

OSTRZEŻENIE: Te instrukcje należy przeczytać razem z instrukcjami

70 APPENDIX E: REDUNDANT POWER SUPPLY SAFETY INFORMATION

dotyczącymi bezpieczeństwa i instalacji dostarczonymi z systemem zasi­lania nadmiarowego.

OSTRZEŻENIE: Jeśli dowolny przełącznik Switch 4200G jest zasilany z
zasilacza RPS, urządzenie musi być uziemione. Można to uzyskać przez
podłączenie przewodu zasilającego do urządzenia lub przez podłączenie
końcówki uziemienia z tyłu urządzenia do dobrego elementu uziemi­ającego. Należy upewnić się, że urządzenie zostało uziemione przed
podłączeniem zasilacza prądu stałego do zasilacza RPS.

OSTRZEŻENIE: Wszystkie zasilacze RPS muszą mieć certyfikat nieuzi-
emionego źródła zasilania SELV zgodny z normami IEC 60950-1/UL
60950-1/EN 60950-1.

OSTRZEŻENIE: Te instrukcje należy przeczytać razem z charaktery-
styką zasilającego prądu stałego przełącznika Switch 4200G opisaną w
Dodatku C, Specyfikacja techniczna.

OSTRZEŻENIE: Podczas pod

łączania kabla do zasilacza RPS należy

przestrzegać zaleceń producenta.

OSTRZEŻENIE: Podczas podłączania kabla do zasilacza RPS należy
upewnić się, że wyłącznik w zasilaczu jest w pozycji otwartej (wyłączony).

OSTRZEŻENIE: Należy upewnić się, że końcówka dodatnia przełącznika
jest podłączona do dodatniej (wspólnej) końcówki zasilacza RPS, a ujem­na końcówka przełącznika jest podłączona do ujemnej końcówki
(wyłącznika) zasilacza RPS.

OSTRZEŻENIE:

Nie używać standardowego „dodatnio uziemionego”

-48-woltowego nadmiarowego systemu zasilania odpowiedniego przy
użyciu ze sprzętem telekomunikacyjnym wraz z przełącznikami siecio-
wymi firmy 3Com w technologii Power-over-Ethernet (PoE). Aby spełnić
wymagania specyfikacji IEEE 802.3af (PoE), -48-woltowy przewodnik
wyjścia musi być odizolowany od ziemi (uziomu) i spełnił wymagania
wykonania izolacji opisanymi w tej specyfikacji.

Regulatory Notices

Regulatory Notices 71

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.

How to identify and resolve radio-TV interference problems

This booklet is available from the U.S. Government Printing Office, Whashington, 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.

ICES Statement This Class A digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe A respecte Class A est conforme a la norme NMB-003 du Canada.

CE Statements

(Europe)

EU Representative:
3Com Europe Limited
Peoplebuilding 2, Peoplebuilding Estate
Maylands Avenue
Hemel Hempstead, Hertfordshire
HP2 4NW
United Kingdom

This product complies with the European Low Voltage Directive 73/23/EEC as amended by European Directive
93/68/EEC and EMC Directive 2004/108/EC.

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.

A copy of the signed Declaration of Conformity can be downloaded from the Product Support web page for
the Switch 4200G Family (3CR17660-91, 3CR17661-91, 3CR17662-91, 3CR17671-91) at
http://www.3com.com.

Also available at http://support.3com.com/doc/SWITCH_4200G_EU_DOC.pdf.

VCCI Statement

72 APPENDIX E: REDUNDANT POWER SUPPLY SAFETY INFORMATION

INDEX

Numbers

3C number 17

A

access levels of default users 41
automatic setup 37

3Com Network Director 37
console port 37

B

browsers

choosing 40

C

cable

10/100/1000 25
FX 25
pin-outs 59

command line interface

management 27
console port 10
conventions

notice icons, About This Guide 4

D

default

settings 14

users 41
documentation

related 4

E

earthing cable 24
Ethernet address of the Switch 17

F

factory defaults 14

H

hardware features 8

I

installing the Switch 15
IP addressing

registered 46

IP configuration 30

L

LEDs 11
logging in as a default user 41

M

MAC address of the Switch 17
management

methods 27
setting up 27

manual setup

console port 32
front panel port 34

P

passwords

of default users 41

pin assignments

modem cable 60
null modem cable 59
RJ45 60

serial cable 59
pin-outs 59
ports 10
power over ethernet 19
power over ethernet (PoE) 25
power socket 14
powering-up a Switch 5500 19
problem solving 43

communication problems 46

hardware problems 44

74 INDEX

IP addressing 44
LEDs 44

R

rack mounting a Switch 5500 16
related documentation 4

S

safety information

English 63
French 64
German 66
Italian 68

Spanish 67
serial number of the Switch 17
SFP

transceivers 20
Simple Network Management Protocol. See SNMP
SNMP 41
SNMP management 29

setting up 41
socket

power 14
specifications, system 47
SSH 39
Switch

automatic setup 37
Switch 5500

3C number 17

dimensions 47

Ethernet address 17

features 8

installation 15

MAC address 17

power socket 14

powering-up 19

rack mounting 16

serial number 17

size 47

unit information label 17

weight 47
system specifications 47

W

Web browsers

choosing 40

web interface

choosing a browser 40

web interface management 28

setting up 40

T

troubleshooting 43

U

unit information label 17