3Com 4500G User Manual

3Com® Switch 4500G Family

www.3Com.com

Part Number: 10014899 Rev. AC Published: October 2007

Getting Started Guide

Switch 4500G 24-Port Switch 4500G 48-Port Switch 4500G PWR 24-Port Switch 4500G PWR 48-Port

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

Copyright © 2006-2007, 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.

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

3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

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

UNITED STATES GOVERNMENT LEGEND

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following:

All technical data and computer software are commercial in nature and developed solely at private expense. Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or as a “commercial item” as defined in FAR rights as are provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights only as provided in DFAR 252.227-7015 (Nov

1987), whichever is applicable. You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in, or delivered to you in conjunction with, this User Guide.

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

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ENVIRONMENTAL STATEMENT

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

Establishing environmental performance standards that comply with national legislation and regulations. Conserving energy, materials and natural resources in all operations. Reducing the waste generated by all operations. Ensuring that all waste conforms to recognized

environmental standards. Maximizing the recyclable and reusable content of all products. Ensuring that all products can be recycled, reused and disposed of safely. Ensuring that all products are labelled according to recognized environmental standards. Improving our environmental record on a continual basis.

End of Life Statement

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Regulated Materials Statement

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

Inc. UNIX is a registered trademark in the United States and other countries,

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

1995) or FAR 52.227-14 (June

Corporation. Novell and NetWare are registered

ABOUT THIS GUIDE

Before You Start 5 Conventions 6 Related Documentation 6

INTRODUCING THE SWITCH 4500G FAMILY

About the Switch 4500G 7 Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail 8 Switch 4500G 24-Port and 48-Port Front Panel LEDs 10 Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail 13 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs 15 System Specifications of the Switch 4500G 18

INSTALLING THE SWITCH

Rack-Mounting the Switch 20 Mounting the Switch on a Desktop 23 The Power-up Sequence 23 Connecting a Redundant Power Supply 24 Connecting Console Cable 28

SETTING UP SWITCH MANAGEMENT

Methods of Managing a Switch 31 Setting Up Your Switch 33 Manually Configuring IP Information 36 Viewing Automatically Configured IP Information 42 Setting Up Command Line Interface Management 44 Setting Up Command Line Interface Management using SSH 45 Setting Up Web Interface Management 45 Setting Up SNMP Management V1 or V2 46 Default Users and Passwords 47

PROBLEM SOLVING

Solving Problems Indicated by LEDs 50 Solving Hardware Problems 51 Solving Communication Problems 52 Solving Fabric Formation Problems 53

PIN-OUTS

Null Modem Cable 55 PC-AT Serial Cable 55 Modem Cable 56 Ethernet Port RJ-45 Pin Assignments 56

TECHNICAL SPECIFICATIONS

Switch 4500G 24-Port 59 Switch 4500G 48-Port 60 Switch 4500G PWR 24-Port 61 witch 4500G PWR 48-Port 62 Grounding Lead 63

OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS

Register Your Product to Gain Service Benefits 65 Solve Problems Online 65 Purchase Extended Warranty and Professional Services 65 Access Software Downloads 66 Contact Us 66

3COM NETWORK MANAGEMENT

3Com Network Supervisor 69 3Com Network Director 70 3Com Network Access Manager 70 3Com Enterprise Management Suite 71 Integration Kit with HP OpenView Network Node Manager 71

REDUNDANT POWER SUPPLY SAFETY INFORMATION

Important Safety Information 73 L’information de Sécurité Importante 74 Wichtige Sicherheitsinformationen 75 Información de Seguridad Importante 76 Importanti Informazioni di Sicurezza 78 Wa¿ne informacje o zabezpieczeniach 79 Regulatory Notices 81

ABOUT THIS GUIDE

Download the latest

software and

documentation for your

3Com switch

Thank you for purchasing a 3Com Switch 4500G. 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 4500G, point your web browser to: www.3Com.com/4500G and select the “Support and Registration” link.

Please note that you must register your 3Com switch to receive software upgrades. To register, point your web browser to eSupport.3Com.com.

Before You Start The guide is intended for use by network administrators who

install and set up network equipment; consequently, it assumes a basic working knowledge of Local Area Networks (LANs).

Release Notes The Release Notes provide important information about the

current software release, including new features, modifications, known problems, and instructions for upgrading your switch. You should read the Release Notes before installing the switch in your network.

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

User documentation and release notes are available in Adobe Acrobat Reader Portable Document Format (PDF) on the 3Com

Wide Web site at http://www.3com.com

World

6 ABOUT THIS GUIDE

Conventions Ta bl e 1 lists important conventions that are used throughout this guide.

Table 1 Notice Icons

Icon Notice Type Description

Information note Information that describes important features or

Caution Information that alerts you to potential loss of data or

Warning Information that alerts you to potential personal injury

instructions

potential damage to an application, system, or device

About the Switch 4500G

FAMILY

This chapter introduces the Switch 4500G and describes how it can be used in your network. It includes a description of the hardware and software features and covers the following topics:

■ About the Switch 4500G

■ Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail

■ Switch 4500G 24-Port and 48-Port Front Panel LEDs

■ Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail

■ Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

■ System Specifications of the Switch 4500G

The 3Com® Switch 4500G (hereinafter referred to as Switch 4500G) are Gigabit Ethernet switching products developed by 3Com. The 3Com® Switch 4500G family delivers flexible quad-speed performance (10/100/1000 and 10-Gigabit) and advanced voice-optimized features such as Power over Ethernet (PoE), auto-QoS and auto-voice VLAN. This makes the Switch 4500G ideal for medium businesses and small enterprises seeking to build a secure converged network.

Currently, the Switch 4500G includes the following models:

■ Switch 4500G 24-Port

■ Switch 4500G 48-Port

■ Switch 4500G PWR 24-Port

■ Switch 4500G PWR 48-Port

The Switch 4500G features the following advantages:

■ Providing full Gigabit speed access ports

■ Providing 10-Gigabit uplink ports

■ Supporting IPv4 hardware forwarding

■ Supporting jumbo frames

■ Supporting port security

■ Supporting link aggregation control protocol (LACP)

■ Supporting 256 VLANs

■ Supporting ACLs

■ Supporting port-based/flow-based mirroring

8 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

(6)

(7)

(8)

(9)

For information about using the software features of the Switch, refer to the “Command Reference Guide” and the “Configuration Guide”.

Summary of Hardware

Features

Ta bl e 2 summarizes the hardware features that are supported by the Switch 4500G.

Table 2 Hardware Features

Feature Switch 4500G

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

Flow Control In full duplex operation all ports are supported.

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

Power over Ethernet Supported on all front panel ports (3CR17171-91 and

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 (0–31) units can be linked together

used, Auto MDIX is not supported.

The Switch 4500G ports can receive, but not send pause frames.

Eight traffic queues per port

3CR17172-91only

Auto-negotiating 10/100/1000BASE-T ports or 100BASE-FX ports (3CR17181-91)

long-haul (LH70) and copper (T), 100BASE-LX10, and 100BASE-FX transceivers in any combination.

(31 members and 1 commander)

Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail

Figure 1 displays the front panel of the Switch 4500G 24-Port unit.

Figure 1 Switch 4500G 24-Port—front panel

(1) 10/100/1000 BASE-T autosensing Ethernet port status LED

(3) Console port (4) 7-segment digitron display

(5) Power LED ((6) LED for extended slot 1

(8) LED for extended slot 2 (9) Mode LED

(10) Mode switching button

(2) Gigabit SFP Combo port status LED

Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail 9

(1) (2)

(3)

(4)

(5)

(1) (2)

(3)

(4)

(5)

(2)

(3)

(4)

(7)

(8)

(9)

(1)

(2)

(3)

(4)

(5)

(1)

(2)

(3)

(4)

(5)

(2)

(3)

(4)

Figure 2 displays the rear panel of the Switch 4500G 24-Port unit.

Figure 2 Switch 4500G 24-Port—rear panel

(1) AC power input (2) Grounding terminal (3) Extended slot 1 (4) Extended slot 2

Figure 3 displays the front panel of the Switch 4500G 48-Port unit.

Figure 3 Switch 4500G 48-Port—front panel

(1) 10/100/1000 BASE-T autosensing

(2) Console port

Ethernet port status LED

(3) 7-segment digitron display (4) Mode switching button

(5) Mode LED (6) Power LED

(7) LED for extended slot 1 (8) LED for extended slot 2

(9) Gigabit SFP Combo port status LED

Figure 4 displays the rear panel of the Switch 4500G 48-Port unit.

Figure 4 Switch 4500G 48-Port—rear panel

(1) AC power input (2) Grounding terminal

(3) Extended slot 1 (4) Extended slot 2

10 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

Switch 4500G 24-Port and 48-Port Front Panel LEDs

The Switch 4500G 24-Port and 48-Port units provide LEDs on the front panel to allow you to monitor the switch.

Ta bl e 3 describes these LEDs. You can use the mode button on the front panel to switch the LEDs display mode (rate mode or duplex mode).

Table 3 Switch 4500G 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

Mode LED Mode Rate

Power LED PWR Green, ON The switch starts normally.

Module LED Module

(MOD)

mode

Duplex mode

Green, blinking (1 Hz) The system is performing power-on

Red, ON The system fails the POST.

Yellow, blinking (1 Hz) One or more ports fail the POST.

OFF The switch is powered off.

Green, ON The module is installed and

Yellow, blinking The module is not supported or is in

OFF The module is not installed.

Green, ON The port status LEDs are showing

the port rates.

Yellow, ON The port status LEDs are showing

the duplex mode of the ports.

self test (POST).

operates normally.

trouble.

Switch 4500G 24-Port and 48-Port Front Panel LEDs 11

Table 3 Switch 4500G 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

7-segment digitron

Unit POST

running

Green, blinking

The POST ID of the in-process test is displayed.

display

POST failed

Loading software

Fan failure

Overtemp erature alarm

Cluster status

Red,

The POST ID of the failed test blinks.

blinking

Green, blinking

A light bar rotates clockwise around the display during the loading procedure.

Red, ON An “F” is displayed.

Red, ON A “t” is displayed.

Green, ON A “C” is displayed if this is a

command switch.

An “S” is displayed if this is a member switch.

A “c” is displayed if this is a candidate switch.

A “1” is displayed when the switch operates independently.

12 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

Table 3 Switch 4500G 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

10/100/1000 BASE-T Ethernet port status LED

1000Base SFP port status LED

Rate mode

Duplex mode

This LED is not influence d by the mode button

Green The port works at the rate of 1000

Mbps; the LED blinks quickly when the port is sending or receiving data.

Yellow The port works at the rate of

10/100 Mbps; the LED blinks quickly when the port is sending or receiving data.

Yellow, blinking (3 Hz)

OFF The port is not connected.

Green The port works in full duplex mode;

Yellow The port works in half duplex mode;

Yellow, blinking (3 Hz)

OFF The port is not connected.

Green The port works at the rate of 1000

Yellow, blinking (3 Hz)

OFF The port is not connected.

POST fails on the port.

the LED blinks quickly when the port is sending or receiving data.

POST fails on the port.

Mbps; the LED blinks quickly when the port is sending or receiving data.

POST fails on the port.

Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail 13

(1) (2)

(3)

(4)

(5)

(1) (2)

(3)

(4)

(5)

Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail

Figure 5 displays the front panel of the Switch 4500G PWR 24-Port unit.

Figure 5 Switch 4500G PWR 24-Port Front Unit’s Front Panel

(1) 10/100/1000 BASE-T autosensing Ethernet port status LEDs

(3) Console port (4) 7-segment digitron display

(5) Power LED (6) DC power LED

(7) LED for extended slot 1 (8) LED for extended slot 2

(9) Mode LED (10) Mode switching button

(2) Gigabit SFP Combo port status LED

Figure 6 displays the rear panel of the Switch 4500G PWR 24-Port Ethernet Switch.

Figure 6 Switch 4500G PWR 24-Port Unit’s Rear Panel

(1) 10/100/1000 BASE-T autosensing Ethernet port status LED

(3) Grounding terminal (4) Extended slot 1

(5) Extended slot 2

(2) AC power input

14 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

(7) (8)

(9)

(1) (2)

(3)

(4)

(5)

(1) (2)

(3)

(4)

(5)

(2)

(3)

(4)

Figure 7 displays the Switch 4500G PWR 48-Port unit’s front panel.

Figure 7 Switch 4500G PWR 48-Port Unit’s Front panel

(1) 10/100/1000 BASE-T autosensing Ethernet port status LEDs

(3) 7-segment digitron display (4) Mode switching button

(5) Mode LED (6) Power LED

(7) LED for extended slot 1 (8) LED for extended slot 2

(9) Gigabit SFP Combo port status LED

(2) Console port

Figure 8 describes the Switch 4500G PWR 48-Port unit’s rear panel.

Figure 8 Switch 4500G PWR 48-Port Unit’s Rear Panel

(1) AC power input (2) Grounding terminal

(3) Extended slot 1 (4) Extended slot 2

Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs 15

Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

Ta bl e 4 describes the Switch 4500G PWR 24-Port and PWR 48-Port units’ LEDs.

Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

Mode LED Mode Rate mode Green, ON The port status LEDs are

showing the port rate.

Duplex mode

PoE mode Green,

Power LED PWR Green, ON The switch starts normally.

Green, blinking (1 Hz) The system is performing

Red, ON The POST fails the POST.

Yellow, blinking (1 Hz) One or more ports fail the

OFF The switch is powered off.

Module LED Module

(MOD)

Green, ON The module is installed and

Yellow, blinking The module is not supported

OFF The module is not installed.

Yellow, ON The port status LEDs are

blinking (1 Hz)

showing the duplex mode of the port.

The port status LEDs are showing the PoE status of the port.

power-on self test (POST).

POST.

operates normally.

or is in trouble.

16 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

0 - 20%

21 - 4 0%

41 - 6 0%

61 - 8 0%

81 - 1 00%

Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

7-segment

Unit POST digitron display

running

Green, blinking

The POST ID of the in-process test is displayed.

POST failed Red, blinking The POST ID of the failed test

blinks.

Loading software

Green, blinking

A light bar rotates clockwise around the display during the loading procedure.

Fan failure Red, ON An “F” is displayed.

Overtemper

Red, ON A “t” is displayed.

ature alarm

Cluster status

Green, ON A “C” is displayed if there is a

command switches.

An “S” is displayed if there is a member switches.

A “c” is displayed if there is a candidate switches.

A “1” is displayed when the switch operates independently.

PoE mode Green, ON Show the utilization of the

power

Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs 17

Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

LED Label Status Description

10/100/1000 BASE-T Ethernet port status LED

10/100/1000 BASE-T Ethernet port status LED (continued)

1000 Base SFP port status LED

None Rate mode Green The port works at the rate of

1000 Mbps; the LED blinks quickly when the port is sending or receiving data.

Duplex mode

PoE mode Green, ON The port supplies power

None PoE mode

(continued)

None This LED is

not influenced by the mode button

Yellow The port works at the rate of

Yellow, blinking (3 Hz)

OFF The port is not connected.

Green The port works in full duplex

Yellow The port works in half duplex

Yellow, blinking (3 Hz)

OFF The port is not connected.

Green, blinking (1 Hz)

Yellow, ON The devices attached to the

Yellow, blinking (3 Hz)

OFF The port does not supply

Green The port works at the rate of

Yellow, blinking (3 Hz)

OFF The port is not connected.

10/100 Mbps; the LED blinks quickly when the port is sending or receiving data.

POST fails on the port.

mode; the LED blinks quickly when the port is sending or receiving data.

POST fails on the port.

normally

The required power of the attached devices has exceeded the maximum power that the port can supply.

The total power that the switch supplies has reached the maximum power, so the port does not supply power any more.

port are not powered devices (PDs), so the port does not supply power.

The PoE power fails, so the port cannot supply power.

POST fails on the port

power.

1000 Mbps; the LED blinks quickly when the port is sending or receiving data.

POST fails on the port.

18 CHAPTER 1: INTRODUCING THE SWITCH 4500G FAMILY

System Specifications of the Switch 4500G

Ta bl e 5 provides the system specifications for the Switch 4500G.

Table 5 System specifications of the Switch 4500G

Switch 4500G 24-Port

Item

Physical dimensions

(H W D)

Weight 4 kg (8.8 lb) 4.5 kg (9.9 lb) 6 kg (13.2 lb) 6.5 kg (14.3 lb)

Console port One Console port

GE ports on the front panel

Optional interface modules

AC Input voltage

Power consumption (full load)

Operating temperature

Relative humidity (noncondensing)

3CR17761-91

43.6 440 300 mm (1.72 17.3 11.8 in.)

24 × 10/100/100 Mbps Ethernet ports

Four Gigabit SFP Combo ports

Switch 4500G 2-port 10-Gigabyte Module, 3C17766

Switch 4500G 2-port Local Connection Module, 3C17767

Switch 4500G 1-port 10-Gigabyte Module, 3C17768

Rated voltage range: 100 VAC to 240 VAC, 50/60 Hz

Max voltage range: 90 VAC to 264 VAC, 47/63 Hz

80 W 120 W 455 W, with 85

0°C to 45°C (32°F to 113°F)

10% to 90%

Switch 4500G 48-Port 3CR17762-91

48 × 10/100/100 Mbps Ethernet ports

Four Gigabit SFP Combo ports

Switch 4500G PWR 24-Port 3CR17771-91

43.6 440 420 mm (1.72 17.3 16.5 in.)

24 × 10/100/100 Mbps Ethernet ports

Four Gigabit SFP Combo ports

W of system power consumption and 370 W of PoE power

Switch 4500G PWR 48-Port 3CR17772-91

48 × 10/100/100 Mbps Ethernet ports

Four Gigabit SFP Combo ports

500 W when RPS is not connected, with 130 W of system power consumption and 370 W of PoE power

870 W when RPS is connected, with 130 W of system power consumption and 740 W of PoE power

INSTALLING THE SWITCH

This section contains information that you need to install and set up your 3Com® switch. For information on upgrading your switch, refer to the Switch 4500G Release Notes available at www.3com.com.

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 73.

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 D, “Redundant Power Supply Safety Information” on page 73.

Appendix E, “Redundant Power Supply Safety

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 D, Information” on page 73 lesen.

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 D, “Redundant Power Supply Safety Information” on page 73.

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 D, Power Supply Safety Information” on page 73.

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

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

on page 73.

“Redundant Power Supply Safety

“Redundant

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

20 CHAPTER 2: INSTALLING THE SWITCH

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.

ATTENZIONE: 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.

Rack-Mounting the Switch

Follow the steps below to mount your switch in a standard 19-inch rack:

1 Check that the rack is sturdy and properly grounded. Attach the rack-mount

brackets to the front or rear panel of the chassis with screws.

2 Place the switch on a shelf in the rack and slide it to a proper position along the

guide rails, reserving a suitable clearance between the device and the guide rails.

3 Fix the brackets to the rack posts with screws, making sure that the device is

securely attached.

Figure 9 Installing the switch in a 19-inch rack

Front bracket

Screw

Front bracket

Screw

Front mount angle

Front bracket

Screw

Front mount angle

Front bracket

Rack-Mounting the Switch 21

Mounting the Front

bracket

Mount the front bracket as shown in Figure 10 and Figure 11.

Figure 10 Mount the front bracket to the device

Figure 11 Mount the front bracket to the mount angel of the rack

Mounting the Rear

Bracket

The Switch 4500G 24-Port and Switch 4500G 48-Port units do not need rear brackets. The description on mounting rear brackets is only for the Switch 4500G PWR 24-Port and Switch 4500G PWR 48-Port.

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 screw mounting as shown in

Figure 12.

22 CHAPTER 2: INSTALLING THE SWITCH

Three positions for screw mountingThree positions for screw mounting

Screw 1

Screw 2

Rear brac ket

Rear mount angle

Screw 1

Screw 2

Rear brac ket

Rear mount angle

Figure 12 Positions for screw mounting 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 screw mounting 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 13 Installation completed 1

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

Screw 2 is mounted to the switch.

Figure 14 Installation completed 2

Screw 2

Screw 1

Rear mount angle

Rear bracket

Screw 2

Screw 1

Rear mount angle

Rear bracket

Mounting the Switch on a Desktop 23

Mounting the Switch on a Desktop

The Power-up Sequence

Powering-up the Switch

4500G

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

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

Screw 2 is mounted to the switch.

In many cases, standard 19-inch racks are not available. Therefore, switches are often placed on a desktop. To place your switch on a desktop, you simply need to:

■ Make sure that the surface is clean, flat, and sturdy.

■ Makes sure that the environment is well ventilated and allow 10 cm (3.9 in.) of

space around the chassis for heat dissipation.

■ Do not place heavy objects on your switch.

■ When stacking, the vertical distance between two switches must be at least 1.5

cm (0.59 in).

The following sections describe how to get your Switch 4500G powered-up and ready for operation.

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

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

Checking for Correct

Operation of LEDs

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 ports on the Switch are disabled and the LEDs light. The PWR LED will flash green during the POST.

When the POST has completed, check the PWR LED to make sure that your Switch is operating correctly.

Ta bl e 6 shows possible colors for the LED.

24 CHAPTER 2: INSTALLING THE SWITCH

Ta bl e 6 PWR LED Colors

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.

* In this event you can still use the Switch using the remaining ports that have passed the

POST.

If there is evidence of a problem, see “Solving Problems Indicated by LEDs” on page 52 for a list of suggested solutions.

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.

Connecting a Redundant Power Supply

The Switch 4500G 26-port PWR 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.

Connecting a Redundant Power Supply 25

WARNING: When powering any Switch 4500G 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. Non PoE enabled switches do not have this restriction.

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 4500G DC supply input are provided in Tab le 11 on page 19.

Specifying the

Redundant Power

System

You can power the Switch 4500G 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 two main benefits:

■ Power Redundancy — if a switch is powered from the mains 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 the availability of the system.

■ Uninterruptable Power — the system allows easy connection and

maintenance of batteries to the RPS shelf to further increase the availability of the system.

3Com’s redundant power solution allows you to use any off-the-shelf -48V DC RPS that meets the requirements defined in

Ta bl e 11 on page 19.

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

+ 57 hidden pages

3Com 4500G User Manual

CONTENTS

ABOUT THIS GUIDE

Before You Start The guide is intended for use by network administrators who

Release Notes The Release Notes provide important information about the

Conventions Ta bl e 1 lists important conventions that are used throughout this guide.

Related Documentation

About the Switch 4500G

Switch 4500G 24-Port and 48-Port Front Panel LEDs

Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs

System Specifications of the Switch 4500G

INSTALLING THE SWITCH

Rack-Mounting the Switch

Mounting the Switch on a Desktop

The Power-up Sequence

Connecting a Redundant Power Supply