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

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

Copyright © 2006-2010, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation.

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

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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.

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

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:

pddtechpubs_comments@3com.com

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

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

27/25

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

Mode

Switch

Mode Green=Speed Yellow=Duplex

51/49

Mode

LED

Power

LED

52/50

PWR

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

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.

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.

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