3COM 4500 PWR 50-PORT, 4500 PWR 26-PORT, 4500 26-PORT, 4500 50-PORT User Manual 2

0 (0)

3Com® Switch 4500 Family

Getting Started Guide

Switch 4500 26-Port

Switch 4500 50-Port

Switch 4500 PWR 26-Port

Switch 4500 PWR 50-Port

www.3Com.com

Part No. 10012034, Rev. AB

Published: April, 2007

3Com Corporation

350 Campus Drive

Marlborough, MA

USA 01752-3064

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CONTENTS

ABOUT THIS GUIDE

Before You Start 7

Conventions 8

Related Documentation 8

Documentation Comments 8

1INTRODUCING THE SWITCH 4500 FAMILY

 

About the Switch 4500 12

 

 

Summary of Hardware Features

13

 

Switch 4500 — Front View Detail

13

 

10BASE-T/ 100BASE-TX Ports

15

 

Gigabit Ports

15

 

 

Console Port

16

 

 

Unit LED 17

 

 

 

LEDs 17

 

 

 

Switch 4500 — Rear View Detail

19

 

Power Socket

19

 

 

Open Book Warning Labels 19

 

Redundant Power System Socket 20

 

Default Settings

20

 

 

 

 

2 INSTALLING THE SWITCH

 

 

Package Contents

23

 

 

Important Steps Before Proceeding

24

Connecting a Redundant Power Supply to your Switch 4500 PWR 24 Specifying the Redundant Power System 27

Connecting the Switch to the Redundant Power System 28 Connecting the Earthing Cable 30

RPS LED 30

 

Using Power over Ethernet

30

 

 

 

 

 

 

The Power-up Sequence

32

 

 

 

 

 

 

 

 

Powering-up the Switch 4500

32

 

 

 

 

 

Checking for Correct Operation of LEDs

32

 

 

 

Choosing the Correct Cables for the 1000BASE-X SFP Ports

33

 

SFP Operation 34

 

 

 

 

 

 

 

 

 

Approved SFP Transceivers

34

 

 

 

 

 

 

Inserting an SFP Transceiver

35

 

 

 

 

 

 

Removing an SFP Transceiver

35

 

 

 

 

 

 

Packing and Shipping the Switch 4500

36

 

 

 

 

 

 

 

 

3 SETTING UP FOR MANAGEMENT

 

 

 

 

 

Methods of Managing a Switch

38

 

 

 

 

 

 

Command Line Interface Management

38

 

 

 

Command Line Interface Management using SSH 39

 

 

Web Interface Management

39

 

 

 

 

 

 

SNMP Management

39

 

 

 

 

 

 

 

 

Setting Up Overview 40

 

 

 

 

 

 

 

 

 

IP Configuration

41

 

 

 

 

 

 

 

 

 

Preparing for Management

42

 

 

 

 

 

 

Manually Configuring IP Information

43

 

 

 

 

Connecting to the Console Port

43

 

 

 

 

 

Connecting to a Front Panel Port

46

 

 

 

 

Viewing Automatically Configured IP Information

49

 

 

Using 3Com Network Director

50

 

 

 

 

 

Connecting to the Console Port

50

 

 

 

 

 

Setting Up Command Line Interface Management

52

 

 

User Interface Overview

52

 

 

 

 

 

 

 

CLI Management via the Console Port

 

52

 

 

 

CLI Management over the Network

52

 

 

 

Setting Up Command Line Interface Management using SSH

53

 

Setting Up Web Interface Management

54

 

 

 

Pre-requisites

54

 

 

 

 

 

 

 

 

 

Web Management Over the Network

 

55

 

 

 

Setting Up SNMP Management V1 or V2

 

55

 

 

 

Pre-requisites

56

 

 

 

 

 

 

 

 

 

Default Users and Passwords

56

 

 

 

 

 

4

CREATING A STACK

 

 

 

How To Interconnect Units

59

 

 

Guidelines For Interconnecting Units 60

 

Unit Numbering within the Stack

61

5

 

 

 

PROBLEM SOLVING

 

 

 

Solving Problems Indicated by LEDs

64

 

Solving Hardware Problems

65

 

 

Solving Communication Problems

67

 

Solving Stack Formation Problems

69

6

 

 

 

UPGRADING SOFTWARE

 

 

 

The Contents of the Executable File

72

 

Upgrading from the Command Line Interface 72

 

Introduction 72

 

 

 

Backup

74

 

 

 

TFTP

74

 

 

 

FTP

 

 

 

 

(via a network port) 76

 

 

 

XModem (via the console cable)

77

Upgrading from the Bootrom Interface 78

 

Introduction

78

 

TFTP

80

 

 

 

FTP

80

 

 

 

XModem

81

 

 

Bootrom Upgrade

82

 

Bootrom Upgrade

 

via TFTP

83

 

 

Bootrom Upgrade

 

via FTP 83

 

 

Bootrom Upgrade

 

via XModem

84

 

 

 

 

A PIN-OUTS

 

 

 

Null Modem Cable

87

 

PC-AT Serial Cable

87

 

Modem Cable

88

Ethernet Port RJ-45 Pin Assignments 88

B TECHNICAL SPECIFICATIONS

 

Switch 4500 (26 Port)

91

 

 

Switch 4500

(50 Port)

92

 

 

Switch 4500

PWR (26 Port)

93

 

Switch 4500

PWR (50 Port)

94

 

RPS 95

 

 

 

 

Earthing Lead 95

 

 

 

 

C OBTAINING SUPPORT FOR YOUR PRODUCT

 

Register Your Product

97

 

 

Purchase Value-Added Services 97

 

Troubleshoot Online

98

 

 

Access Software Downloads

98

Telephone Technical Support and Repair 98

Contact Us 99

INDEX

ABOUT THIS GUIDE

This guide provides all the information you need to install and use the following switches in their default state:

Switch 4500 26-Port (3CR17561-91)

Switch 4500 50-Port (3CR17562-91)

Switch 4500 PWR 26-Port (3CR17571-91)

Switch 4500 PWR 50-Port (3CR17572-91)

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

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 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.

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

The latest versions of user guides and release notes are available in Adobe

Acrobat Reader Portable Document Format (PDF) on the 3Com

World Wide Web site:

http://www.3com.com/

8 ABOUT THIS GUIDE

Conventions

Table 1 lists conventions that are used throughout this guide.

 

Table 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

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

Documentation

following:

 

 

Switch 4500 Configuration Guide

 

This guide contains information on the features supported by your

 

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

 

Switch 4500 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 4500 Command Reference Guide

 

This guide provides detailed information about the web interface and

 

command line interface that enable you to manage the Switch

 

Release Notes

 

 

These notes provide information about the current software release,

 

including new features, modifications, and known problems. The

 

Release Notes are supplied in hard copy with your Switch.

 

 

Documentation

Your suggestions are very important to us. They will help make our

Comments

documentation more useful to you. E-mail comments about this

 

document to 3Com at:

 

pddtechpubs_comments@3com.com

Documentation Comments

9

Please include the following information when commenting:

Document title

Document part number (on the title page)

Page number (if appropriate)

Example:

Part Number 10015034 Rev. AB

Switch 4500 Family Getting Started Guide

Page 21

We can only respond to comments and questions about 3Com product documentation at this e-mail address. Please direct all questions related to technical support or sales in the first instance to your network supplier.

10 ABOUT THIS GUIDE

1

INTRODUCING THE

 

 

SWITCH 4500 FAMILY

This chapter contains introductory information about the Switch 4500 and how it can be used in your network. It covers summaries of hardware and software features and also the following topics:

About the Switch 4500

Switch 4500 — Front View Detail

Switch 4500 — Rear View Detail

Default Settings

12 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

About the Switch

The Switch 4500 Family are mixed media devices. Table 2 summarizes

4500

what each Switch consists of:

 

 

 

 

 

 

 

 

 

Table 2 Switch 4500 Family Hardware

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch 4500 Family

 

10BASE-T\100BASE-TX Ports

 

10BASE-T\100BASE-TX PoE Ports

10BASE-T\1000BASE-TX\1000BASE-T Ports

1000BASE-X SFP Ports

1000BASE-T SFP Transceiver

RJ-45 Console Port

-48V DC RPS Input

 

 

 

 

 

 

 

 

 

 

 

 

Switch 4500 26 Port

 

24

 

 

2*

2*

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch 4500 50 Port

 

48

 

 

2*

2*

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

Switch 4500 PWR 26 Port

 

 

 

24

2*

2*

2

1

1

 

 

 

 

 

 

 

 

 

 

 

 

Switch 4500 PWR 50 Port

 

 

 

48

2*

2*

2

1

1

 

 

 

 

 

 

 

 

 

 

 

* Combo SFP and 10/100/1000 Ports

† 1000BASE-T SFP transceiver installed in last two 1000BASE-X SFP ports

The Switch 4500 Family provides workgroup connectivity at 10and 100-Mbps, and high-speed Gigabit ports for stacking, uplinks to a backbone, or for server connections. With stacking, you can add additional Switch 4500s as your network grows while preserving ease of management.

For information about using the software features of the Switch, refer to the “Command Reference Guide” on located on 3Com’s Web site at www.3com.com.

 

 

Switch 4500 — Front View Detail 13

Summary of Table 3 summarizes the hardware features that are supported by the

Hardware Features Switch 4500.

 

 

Table 3 Hardware Features

 

 

 

 

 

Feature

Switch 4500

 

 

 

 

Addresses

Up to 8,000 supported

 

Auto-negotiation

Supported on all non-SFP ports

 

Forwarding Modes

Store and Forward

 

Duplex Modes

Half and full duplex on all ports

 

Auto MDI/MDIX

Supported on all ports. If fiber SFP transceivers are

 

 

used, Auto MDIX is not supported.

 

Flow Control

In full duplex operation all ports are supported

 

Traffic Prioritization

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

 

 

Eight traffic queues per port

 

Power over Ethernet

Supported on 10/100 ports (3CR17571-91 and

 

 

3CR17572-91 only)

 

Ethernet and Fast Ethernet

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

 

Ports

 

 

Gigbait Ethernet Ports

Auto-neogotiating 10BASE-T/100BASE-TX/

 

 

1000BASE-T ports (3CR17561-91) only

 

SFP Ethernet Ports

Supports fiber Gigabit Ethernet short-wave (SX),

 

 

long-wave (LX), long-haul (LH70) and copper (T)

 

 

transceivers in any combination.

 

RPS Supplemental

Connects to -48v DC supply (3CR17571-91 and

 

PoE Power

3CR17572-91 only)

 

Mounting

19-inch rack or stand-alone mounting

 

 

 

Switch 4500 —

Front View Detail

Figure 1 Switch 4500 26-Port — front view

Port Status LEDs

 

 

Console Port

 

 

 

Unit LED

Speed: (100Base-TX) Green = 100Mbps Yellow = 10Mbps (1000Base-X) Green = 1000Mbps Yellow = 10/100Mbps Duplex: Green = Full Duplex, Yellow = Half Duplex

 

 

3CR17561-91 SuperStack 3 Switch 4500 26-Port

 

 

 

25

26

27/25

28/26

 

10/100BASE-TX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1000BASE-X

 

10/100/1000BASE-T

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1000BASE-X

10/100BASE-TX Ports Combo Port Power LED Pair

10/100/1000BASE-T

Combo Port Pair

3COM 4500 PWR 50-PORT, 4500 PWR 26-PORT, 4500 26-PORT, 4500 50-PORT User Manual 2

14 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

Figure 2 Switch 4500 50-Port — front view

Port Status LEDs

Console Port Unit LED

PWR LED

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

3CR17562-91 SuperStack 3 Switch 4500 50-Port

 

49

50

51/49

52/50

PWR

RPS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RPS LED

 

 

 

 

 

 

1000BASE-X SFP Ports

 

 

 

10/100BASE-TX Ports

(Two pairs of Combo Ports

 

 

 

fitted with two1000BASE-T SFP

 

 

 

 

 

 

transceivers in last two ports)

 

 

Figure 3 Switch 4500 26-Port PWR - front view

 

 

 

 

 

 

Port Status LEDs

 

 

Console Port

 

 

RPS LED

 

 

 

 

 

Unit LED

 

 

 

 

 

Speed: (100Base-TX) Green = 100Mbps Yellow = 10Mbps

Duplex: Green = Full Duplex, Yellow = Half Duplex

Power: Green = Delivering Power, Yellow = Fault, Flashing Green = Over Budget

 

 

3CR17571-91 SuperStack 3 Switch 4500 PWR 26-Port

 

 

 

 

 

 

25

26

27/25

28/26

 

 

 

 

 

 

Mode

RPS

 

 

 

 

 

Green=Speed

 

 

 

 

 

Yellow=Duplex

 

 

 

 

 

 

Flashing=PoE

PWR

 

 

 

 

 

 

 

10/100BASE-TX

 

 

 

 

 

 

 

1000Base-X SFP Ports

 

10/100BASE-TX Ports

(Two pairs of Combo Ports

Mode LED

Power LED

 

fitted with two 1000BASE-T

 

 

 

 

SFP transceivers in last two ports)

 

 

 

Figure 4 Switch 4500 50-Port PWR - front view

 

 

 

 

Port Status LEDs

 

Console Port

Unit LED

PWR LED

 

 

 

 

 

Mode LED

Speed:Green = 100Mbps, Yellow = 10Mbps Duplex:Green = Full Duplex, Yellow = Half Duplex Power:Green = Deliverng Power. Yellow=Fault, Flashing Green=Over Budget

3CR17572-91 SuperStack 3 Switch 4500 PWR 50-Port

 

Mode

 

Green=Speed

 

 

 

 

 

Yellow=Duplex

 

 

 

 

 

Flashing=PoE

49

50

51/49

52/50

PWR

RPS

1000BASE-X SFP PortsRPS LED

10/100BASE-TX Ports

(Two pairs of Combo Ports

fitted with two 1000BASE-T

 

SFP transceivers in last two ports)

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

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

Switch 4500 — Front View Detail 15

10BASE-T/ The Switch 4500 has 24 or 48 auto-negotiating 10BASE-T/100BASE-TX 100BASE-TX Ports ports configured as Auto MDIX (cross-over). These ports automatically

provide the appropriate connection. Alternatively, you can manually set these ports to 10BASE-T half-duplex, 10BASE-T full0-duplex, 100BASE-TX half-duplex or 100BASE-TX full-duplex. The maximum segment length is 100 m (328 ft) over Category 5 twisted pair cable.

Gigabit Ports Switch 4500 10/100 Ethernet models support two simultaneous Gigabit connections. Each switch has four Gigabit ports, arranged in two pairs called “dual-personality combo port pairs.” Only one port in each pair can be activeat a time.

The paired ports for the Switch 4500 26 Port and PWR 26 Port are:

25 and 27

26 and 28

The paired ports for the Switch 4500 50 Port and PWR 50 Port are:

49 and 51

50 and 52

By default, the ports are enabled as follows for the 26-Port switches:

Port 25 = active; Port 27 = inactive

Port 26 = active; Port 28 = inactive

By default, the ports are enabled as follows for the 50-Port switches:

Port 49 = active; Port 51 = inactive

Port 50 = active; Port 52 = inactive

To change which port is active, issue the undo shutdown command on the inactive port. This will enable the previously inactive port and disable its pair. Issuing this command will cause the switch to reboot.

A Gigabit connection can be either copper-based 1000Base-T or SFP-based fiberoptic connection. On the Switch 4500 10/100 26 Port unit, there are two SFP slots and two 1000Base-T ports. On the Switch 4500 PWR 26 Port, 50 Port, and PWR 50 Port models all the physical Gigabit ports are SFP slots.

16 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

Two 1000Base-T SFP transceivers are included with these units. These SFP transceivers can be inserted in any of the four SFP slots to provide copper Gigabit connectivity. If you install these in the inactive ports, then you will need to issue the undo shutdown command on those ports to make them active.

SFP (Small Form Factor Pluggable, or mini-GBIC) ports support fiber Gigabit Ethernet short-wave (SX), 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.

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.

Switch 4500 — Front View Detail 17

Unit LED The Unit LED is a seven segment display visible on the front of the Switch. The Unit LED can be used to indicate the unit number in a fabric, POST test ID and software upgrade information. In the unlikely event of a hardware fault occurring, the Unit LED may be used to help diagnose the problem. For information on using the Unit LED for problem solving, see “Solving Problems Indicated by LEDs” on page 64

LEDs Table 4 lists LEDs 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 64.

Table 4 LED Behavior

LED Color

Indicates

 

 

Unit LED

 

Green

Power On Self Test (POST) is in progress. During POST a the

 

test ID number appears in the Unit LED (seven segment

 

display).

 

or

 

Software download is in progress. During software

 

download, a clockwise cycling bar appears in the Unit LED.

Green flashing

The Switch has failed POST. The Unit LED flashes the

 

number of the test that has failed.

Green flashing ‘f’ There has been a fan failure.

Green flashing ‘t’ The Switch is over temperature and unit temperature is critical.

PWR LED

 

Green

The Switch is powered-up and operating normally.

Green flashing

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 (3CR17571-91 and 3CR17572-91 only)

Speed

Green

10/100 Port Speed and Activity, 1000 SFP Status and

 

 

Activity, or Stack Status and Activity.

Duplex Yellow

10/100 Duplex and Activity, 1000 SFP Duplex and Activity,

 

 

or Stack Activity

PoE

Red

10/100 Port showing PoE Information

18 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

LED

Color

Indicates

 

RPS LED (3CR17571-91 and 3CR17572-91 only)

 

Green

AC and RPS supply connected.

 

Yellow

AC failed or not connected. RPS supply is OK.

 

Off

There is no RPS supply connected.

10BASE-T/100-TX Port LEDs

Speed

Green

A high speed (100 Mbps) link is present, blinking off for

 

 

every packet received or transmitted.

 

Yellow

A low speed (10 Mbps) link is present, blinking off for every

 

 

packet received or transmitted.

 

Yellow Flashing

The port has failed POST.

 

Off

No link is present.

Duplex (3CR17571-91 and 3CR17572-91 only)

 

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.

PoE (3CR17571-91 and 3CR171572 only)

 

Green

Power is being delivered to the port.

 

Green flashing

Port power has exceeded limit or is unable to supply power

 

 

due to unit being over budget.

 

Yellow

PoE error, no power supplied on port.

 

Yellow flashing

The port has failed post.

 

Off

No power is being delivered.

1000BASE-X SFP Port LEDs

Speed

Green

A high speed (1000 Mbps) link is present.

 

Yellow Flashing

Port failed POST.

 

Off

No link is present.

Duplex (3CR17571-91 and 3CR17572-91 only)

 

Green

Full duplex packets are being transmitted/received on the

 

 

port.

 

Yellow

Half duplex packets are being transmitted/received on the

 

 

port.

 

Yellow flashing

Port failed POST.

 

Off

No link is present.

 

 

 

Switch 4500 — Rear View Detail 19

Switch 4500 — Rear

Figure 5 Switch 4500 — rear view

 

 

View Detail

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power Socket

 

 

 

 

 

Open Book Warning Labels

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

~100-240V; 50/60Hz; 1A

Earthing Screw

 

 

Figure 6 Switch 4500 PWR - rear view

Power Socket

 

Open Book Warning Labels

 

NULL

 

~100-240V; 50/60Hz; 7.0A

 

 

-53

-55V;19.5A

 

Redundant Power System Socket

Earthing Screw

Power Socket The Switch automatically adjusts its power setting to any supply voltage in the range 100-240 VAC.

Open Book Warning Before installing or removing any components from the Switch 4500 or Labels carrying out any maintenance procedures, you must read the safety

information provided in Appendix A of this guide.

AVERTISSEMENT: Avant d'installer ou d'enlever tout composant des commutateurs de la gamme Switch 4500 ou d'entamer une procédure de maintenance, lisez les informations relatives à la sécurité qui se trouvent dans l'annexe A de ce guide.

VORSICHT:Bevor Sie Komponenten der Switch 4500-Baureihe installieren oder deinstallieren und bevor Sie Wartungsarbeiten ausführen, müssen Sie die in Anhang A dieses Handbuchs aufgeführten Sicherheitshinweise lesen.

ADVERTENCIA: Antes de instalar o extraer cualquier componente del Switch 4500 Family o de realizar tareas de mantenimiento, debe leer la información de seguridad facilitada en el Apéndice A de esta guía.

20 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

AVVERTENZA: Prima di installare o rimuovere qualsiasi componente dello Switch 4500 Family o di eseguire qualsiasi procedura di manutenzione, leggere le informazioni di sicurezza riportate nell'Appendice A di questa guida.

OSTRZEŻENIE: Przed instalacją lub usunięciem jakichkolwiek elementów z przełącznika z rodziny 4500 lub przeprowadzeniem prac konserwacyjnych należy zapoznać się z informacjami o bezpieczeństwie zawartymi w Załączniku A niniejszego podręcznika.

Redundant Power Provides supplemental power for PoE ports (up to 15.4w on all ports) and System Socket redundant power for powered devices and the Switch itself.

Default Settings Table 5 shows the default settings for the Switch 4500 Family:

Table 5 Default Settings

Feature

Switch 4500

 

 

Automatic IP Configuration

Enabled

Port Status

Enabled

Port Speed

Auto-negotiated

Duplex Mode

Auto-negotiated

Power over Ethernet

Enabled (3CR17571-91 and 3CR17572-91 only)

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

Any VLAN for all units.

Link Aggregation Control

Disabled per port

Protocol (LACP)

 

IP Multicast Filtering

Filtering enabled

Rapid Spanning Tree Protocol

Enabled

Fast Start

Enabled on front panel ports

RMON Alarm

Enabled

 

Default Settings

21

 

 

 

Feature

Switch 4500

 

 

 

Traffic Prioritization

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

 

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

Port Security

Disabled per port

 

Configuration Save and

Disabled

 

Restore

 

 

 

 

 

22 CHAPTER 1: INTRODUCING THE SWITCH 4500 FAMILY

2

INSTALLING THE SWITCH

 

This chapter contains supplemental information on setting up your Switch 4500. These details are intended to be read together with the printed documents that accompany your switch.

Package Contents

Switch unit

 

Unit Information Labels

 

Warranty Information

 

RPS Flyer

 

Power Cord

 

Console Cable (RJ-45)

 

RPS -48V DC Connector and backshell (3CR17571-91 and

 

 

3CR17572-91 only)

 

 

RPS Connector Cable Tie

 

 

Earthing Lead

 

2 x Front securing brackets

 

4 x Screws

 

2 x Back securing brackets and 2 x Screws (3CR17571-91 and

 

 

3CR17572-91 only)

 

4 x Rubber feet

 

Important Information Notice

 

Safety and Regulatory Information

24 CHAPTER 2: INSTALLING THE SWITCH

Important Steps

Before proceeding, make sure to access the Switch 4500 information on

Before Proceeding

3Com’s Web site at www.3Com.com and:

 

Read the document entitled “3Com Switch Family Safety and

 

Regulatory Information,” which contains information on how to

 

set-up your Switch 4500 and all the safety and regulatory warnings.

 

Refer to the document entitled “Important Information” for

 

instructions on how to retrieve the latest documentation and software

 

for your switch.

 

Set-up your switch in the desired location.

 

Download the documentation to your local hard-drive or to an

 

accessible server.

 

 

Connecting a

The Switch 4500 PWR 26 and 50 port have a -48V DC Redundant Power

Redundant Power

Supply socket that can be used in addition to the standard AC connection

Supply to your

of the switch. If you intend to use this DC connection, please read this

Switch 4500 PWR

section.

 

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 4500 PWR 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. You

 

must ensure that the earth connection is made before connecting the DC

 

supply from the RPS.

 

3Com Switches which support -48V DC RPS inputs, that are PoE enabled,

 

can only be powered by an RPS which complies with the isolation

 

requirements of IEEE-Std 802.3af. Non PoE enabled switches do not have

 

this restriction.

WARNING: A standard 'positive-earthed' -48V redundant power system suitable for use with telecommunications equipment should not be used

Connecting a Redundant Power Supply to your Switch 4500 PWR 25

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.

26 CHAPTER 2: INSTALLING THE SWITCH

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 4500 DC supply input are given in Appendix B on page 91.

The Switch 4500 PWR units can be powered in three different ways:

AC Mains only — does not offer any power redundancy. If the AC mains supply or the AC power supply fail, the Switch will power 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 an environment where only DC power is available.

The RPS provides three main benefits to the customer:

Power Redundancy — if a Switch is powered from the mains supply unit, a failure of the internal power supply will cause the Switch to fail. This can be overcome by connecting both the AC and DC RPS supplies to the Switch. Additional redundancy can also be added to the DC power by using (N+1) DC power supplies to further increase the availability of the system.

Uninterruptible Power — the system allows easy connection and maintenance of batteries to the RPS shelf to further increase the availability of the system.

Additional Power to PoE Ports — the internal AC Power Supply of a PoE Switch can provide enough power for most network applications. The RPS can be used to supplement additional power (up to a maximum of 15.4W), including full backup of all PoE devices on the network.

Table 6 below, outlines the behavior of the Switch when changes occur to the power system, such as removing the AC mains cable when the RPS is attached. The responses to the different power inputs are controlled by the Switch’s internal power supply and not by the RPS.

Connecting a Redundant Power Supply to your Switch 4500 PWR 27

Table 6 Switch Power Inputs

Power Input before

Power Input after

Correct Response

User Intervention

User Intervention

 

 

 

AC mains and RPS

RPS only

The unit remains powered by the RPS.

AC mains and RPS

AC mains only

The unit is powered by the AC mains.

 

 

PoE dropped on all ports, however

 

 

the unit does not reset. PoE restarts

 

 

powered by the remaining power

 

 

from the AC mains. PoE ports will be

 

 

dropped depending on their preset

 

 

priority level.

 

 

The total power available to the

 

 

Switch may be less than when

 

 

powered from the RPS. Some PoE

 

 

ports may be dropped as they are

 

 

unable to obtain the power they

 

 

require.

RPS only

AC mains and RPS

The unit remains powered by the RPS.

AC mains

AC mains and RPS

The unit is powered by the RPS. PoE

 

 

ports can be added.

 

 

 

Specifying the

3Com’s redundant power solution allows the use of any off-the-shelf

Redundant Power

-48V DC RPS that meets the requirements defined in Appendix B on

System

page 91.

 

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 the total -48V power available can be increased by adding additional rectifiers. For example, three 1500W rectifiers can provide up to 4500W. Hot removal or insertion of a rectifier will not affect the -48V DC output voltage.

Table 7 shows an example of the total power available from a number of 1500W rectifiers.

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

28 CHAPTER 2: INSTALLING THE SWITCH

Table 7 Power Availability

 

 

 

Rectifiers

 

 

 

 

1

2

3

4

5

6

 

 

 

 

 

 

 

No Rectifier

1500W

3000W

4500W

6000W

7500W

9000W

Redundancy

 

 

 

 

 

 

N+1 Rectifier

-

1500W

3000W

4500W

6000W

7500W

Redundancy

 

 

 

 

 

 

 

 

 

 

 

 

 

The -48V DC power distribution provides the mechanism to connect to the Switch 4500 PWR. The distribution consists of a number of circuit breakers and connection terminals for the positive (common) and negative -48V outputs. Each Switch 4500 PWR must be individually connected to a circuit breaker terminal.

A battery can also be connected to battery terminals prior to the DC power distribution to provide uninterrupted power in order to protect 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 to a number of network switches.

Each RPS consists of a shelf which can house from one to six rectifiers, a

Distribution Module and a Management Module.

Connecting the When connecting the RPS to the Switch, the circuit breaker and 2-core Switch to the cable need to be matched to the power rating of the Switch. Table 8 Redundant Power shows the recommended circuit breaker and cable rating for the Switch

System 4500. The recommended cable length should not exceed 3 metres (9.84 feet).

Table 8 Switch 4500 Circuit Breaker and Cable Ratings

 

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

Connecting a Redundant Power Supply to your Switch 4500 PWR 29

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.

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.

Figure 7 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 at the rear of the RPS connector as shown.

Figure 7 RPS Connection to the Switch

 

 

 

+

- NULL

 

 

 

;1.0A

 

 

 

~100

;50/60Hz

 

 

 

-240V

 

 

NULL

 

 

Cable Tie

 

 

 

 

-48

-60V;2 0A

 

 

 

 

 

 

Null

 

 

Pinout

 

-

 

 

 

 

 

 

 

 

+

 

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

30 CHAPTER 2: INSTALLING THE SWITCH

The -48V DC power will take priority over the AC mains and will power the Switch if it is connected.

Connecting the Use the earthing cable that accompanies your Switch if the length is Earthing Cable suitable. Alternatively use the earthing cable specification as defined in

Appendix B on page 91.

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

The recommended cable length should not exceed 3 metres (9.84 feet).

RPS LED The RPS status LED on the front of the Switch 4500 PWR indicates the status of the RPS and AC supplies as shown in Table 9.

Table 9 RPS LED Colors

Color

State

 

 

Green

AC and RPS supply connected.

Yellow

AC failed or not connected. RPS supply is ok.

Off

There is no RPS supply connected.

 

 

Using Power over The Switch 4500 Power over Ethernet (PoE) units can supply power to Ethernet any IEEE 802.3af compliant device through any of its 10/100 ports over a

Category 5 or Category 5e Ethernet cable. The same cable connects the device to the network.

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 will supply the power required to the device, providing that the total power budget for the Switch would not be exceeded by doing so.

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 unpowered network:

Reduced Cabling — a PoE (802.3af) compliant device which has its power supplied over its ethernet cable does not require a separate power supply. If, for example, the Switch is used to connect a 3Com 11 Mbps Wireless LAN Access Point 8500 to the network, then only a

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