3Com Switch DUA1770 0AAA04 User Manual

SuperStack 3

Switch 4900 Series

Getting Started Guide

Switch 4900 (3C17700)

Switch 4900 SX (3C17702)

Switch 4924 (3C17701)

Switch 4950 (3C17706)

http://www.3com.com/

Part No. DUA1770-0AAA04

Published August 2002

Download from Www.Somanuals.com. All Manuals Search And Download.

CONTENTS

ABOUT THIS GUIDE

Conventions

Related Documentation

Documentation

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

following:

■

SuperStack 3 Management Quick Reference Guide

This guide contains:

■

a list of software features supported by each Switch.

■

a summary of the web interface and command line interface

commands for the Switch.

■

Release Notes

These notes provide information about the current software release,

including new features, modifications, and known problems.

SuperStack 3 Switch Implementation Guide

This guide contains information on the features supported by your

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

supplied in PDF format on the CD-ROM that accompanies the Switch.

■

Management Interface Reference Guide

This guide provides detailed information about the web interface and

command line interface that enable you to manage the Switch. It is

supplied in HTML format on the CD-ROM that accompanies the

Switch.

There are other publications you may find useful:

■

Documentation accompanying the Advanced Redundant Power

System.

■

Documentation accompanying the Expansion Modules.

Documentation accompanying 3Com Network Supervisor. This is

supplied on the CD-ROM that accompanies the Switch.

Accessing Online

Documentation

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

documentation:

■

SuperStack 3 Switch Implementation Guide (PDF format)

SuperStack 3 Switch Management Interface Reference Guide (HTML

format)

■

Other documentation relating to the Switch 4900 Series (PDF format)

Download from Www.Somanuals.com. All Manuals Search And Download.

ABOUT THIS GUIDE

To access the online documentation from the CD-ROM:

1 Insert the CD-ROM into the relevant CD-ROM drive. If your PC has

auto-run enabled, a splash screen will be displayed automatically.

2 Select the Documentation section from the contents page.

If the online documentation is to be accessed from a local drive or server,

you will need to access the CD-ROM contents via the root directory and

copy the files from the CD-ROM to a suitable directory.

■

The HTML Reference Guide is stored in the Docs/referenceguide

on the CD-ROM. The documentation is accessed using the index.htm

file.

■

The PDF Implementation Guide is stored in the

Docs/implementationdirectory of the CD-ROM.

3Com recommends that you copy the Docs/referenceguide

directory as a whole to maintain the structure of the files.

Product

Registration

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

receive up-to-date information on your product:

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

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:

[email protected]

Please include the following information when commenting:

■

Document title

Document part number (on the title page)

Page number (if appropriate)

Example:

Part Number DUA1770-0AAA0x

SuperStack 3 Switch 4900 Series Getting Started Guide

Page 21

Download from Www.Somanuals.com. All Manuals Search And Download.

INTRODUCING THE

SUPERSTACK 3 SWITCH 4900 SERIES

This chapter contains introductory information about the Switch 4900,

4900 SX, 4924 and 4950 and how they can be used in your network. It

covers summary information about the hardware.

The information for all the Switches in the Switch 4900 Series is the same

unless otherwise stated.

■

About the Switches

Summary of Hardware Features

Switch — Front View Detail

■

100/1000BASE-T and 10/100/1000BASE-T Ports

1000BASE-SX Ports

GBIC Ports

LEDs

■

Switch — Rear View Detail

■

Unit Information Label

Power Socket

Redundant Power System Socket

Console Port

Expansion Module Slot

■

Default Settings

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

About the Switches

■

The Switch 4900 connects your existing 100 Mbps devices and

high-performance workgroups with a 1000 Mbps copper backbone or

server connection.

The Switch 4900 SX connects your existing 1000 Mbps devices and

high-performance workgroups with a 1000BASE-SX fiber backbone or

server connection.

The Switch 4924 connects your existing 10 Mbps and 100 Mbps

devices and high-performance workgroups to a 1000 Mbps copper

backbone or server connection.

The Switch 4950 is a 10/100/1000 Mbps mixed media device that

allows you to connect your existing 10/100/1000 Mbps devices and

high-performance workgroups to a fiber or copper gigabit backbone

or server connection.

You can also interconnect any combination of two Switches from the

SuperStack^®4900 Series or 3Com Switch 4050/4060 range to create an

XRN Distributed Fabric. This allows you to create a highly resilient core

around which you can build your network. For more information about

interconnecting Switches, see “Creating an XRN Distributed Fabric” on

page 24. For more information about 3Com XRN Technology and how to

use it in your network, refer to the Implementation Guide on the

CD-ROM that accompanies the Switch.

For information about using the software features of the Switch, refer to

the “SuperStack 3 Switch Management Interface Reference Guide” on

the CD-ROM that accompanies the Switch.

Download from Www.Somanuals.com. All Manuals Search And Download.

About the Switches

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

Hardware Features Switches.

Table 3 Hardware features

Feature

Switch 4900 Series

Fast Ethernet

and Gigabit

Ethernet Ports

Switch 4900: 12 Auto-negotiating 100BASE-TX/1000BASE-T

ports

Switch 4900 SX: 12 Auto-negotiating 1000BASE-SX ports

Switch 4924: 24 Auto-negotiating

10BASE-T/100BASE-TX/1000BASE-T ports

Switch 4950: 12 Auto-negotiating

10BASE-T/100BASE-TX/1000BASE-T, 6 1000BASE-SX and

6 GBIC ports

Addresses

■

Up to 12,000 supported

■

Up to 64 permanent entries

Forwarding

Modes

Store and Forward

Duplex Modes

■

Half duplex only supported on

10BASE-T/100BASE-TX/1000BASE-T ports in 10/100 Mbps

mode

■

All 1000 Mbps ports are full duplex only

Flow Control

Supported on all ports

Smart

auto-sensing

■

Supported on all 10BASE-T/100BASE-TX/1000BASE-T ports

Not supported on 1000BASE-SX and GBIC ports

■

Traffic

Prioritization

Supported (IEEE Std 802.1D, 1998 Edition)

Four traffic queues per port

Layer 3

Switching

Support for wire-speed IP routing

RPS Support

XRN Support

Mounting

Connects to SuperStack 3 Advanced Redundant Power System

(ARPS) (3C16071B)

eXpandable Resilient Networking (XRN) support. Allows

interconnection of two units to create a Distributed Fabric.

19-inch rack or stand-alone mounting

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

Switch — Front

View Detail

Figure 1 Switch 4900 — front view

Figure 2 Switch 4900 SX — front view

Download from Www.Somanuals.com. All Manuals Search And Download.

Switch — Front View Detail

Figure 3 Switch 4924 — front view

Figure 4 Switch 4950 — front view

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot

be used as standard traditional telephone sockets, or to connect the unit to a

traditional PBX or public telephone network. Only connect RJ-45 data

connectors, network telephony systems, or network telephones to these

sockets.

Either shielded or unshielded data cables with shielded or unshielded

jacks can be connected to these data sockets.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

100/1000BASE-T and The 100BASE-TX/1000BASE-T and 10BASE-T/100BASE-TX/1000BASE-T

10/100/1000BASE-T ports have RJ-45 connectors and are configured as Auto MDIX

Ports (cross-over).

The default state for these ports is auto-negotiation enabled, where the

speed, duplex and flow control modes of a link are automatically

detected to provide the highest available bandwidth with the link partner.

Alternatively, auto-negotiation can be disabled. These ports can be

manually configured to 10 Mbps half duplex (if supported), 100 Mbps

half duplex, 10 Mbps full duplex (if supported), or 100 Mbps full duplex.

It is not possible to manually configure a 1000BASE-T link as

auto-negotiation is mandatory in the 1000BASE-T standard.

The maximum segment length is 100 m (328 ft) over Category 5 twisted

pair cable.

1000BASE-T operation only supports full-duplex mode.

10BASE-T (10 Mbps) is only supported on Switch 4924 and 4950.

1000BASE-SX Ports 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 and the flow control setting can be manually configured.

1000BASE-SX ports do not support auto-negotiation of speed and only

support full duplex mode.

GBIC Ports GBIC ports support fiber Gigabit Ethernet short-wave (SX), long-wave

(LX) and long-haul (LH70) GBIC transceivers in any combination. This

offers you the flexibility of using GBIC 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 and the flow control setting can be manually configured.

Download from Www.Somanuals.com. All Manuals Search And Download.

Switch — Front View Detail

LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their

status according to color. For information on using the LEDs for problem

solving, see “Checking for Correct Operation of LEDs” on page 26.

Table 4 LED behavior

LED

Color

Indicates

Port Status LEDs

Packet

Status

Yellow

Off

Packets are being transmitted/received on the port.

No packets are being transmitted/received on the port.

Green

A high speed (1000 Mbps) link is present, and the port

is enabled.

Green flashing A high speed (1000 Mbps) link is present, but the port

is disabled.

Yellow

A low speed (100 Mbps on 4900, 10/100 Mbps on

4924/4950) link is present, and the port is enabled.

(Not applicable on 4900 SX.)

Yellow flashing A low speed (100 Mbps on 4900, 10/100 Mbps on

4924/4950) link is present, but the port is disabled.

(Not applicable on 4900 SX.)

Off

No link is present.

Module Status LEDs

Green

The Module is installed and supported. The Link Status

has been determined for a single port Module.

Yellow

The Module is installed and supported. The Module

has multi-ports or there is no Link for a single port

Module.

Yellow flashing The Module is installed but not supported. Note that

the Switch will continue to operate normally.

Off

The Module is not installed.

Unit LEDs

1–4

Green

Determines the identity of the Switch when

interconnected to another Switch to create an XRN

Distributed Fabric and that a link is present.

Off

A fault has occurred.

Power/Self Test LED

Green

The Switch is powered-up and operating normally.

Green flashing The Switch is either downloading software or is

initializing (which includes running a Power On Self

Test).

Yellow

Off

The Switch has failed its Power On Self Test.

The Switch is not receiving power.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

LED

Layer 3 LED

Green

Off

Color

Indicates

The Switch software supports Layer 3.

The Switch software does not support Layer 3.

Switch — Rear

View Detail

Figure 5 Switch 4900 — rear view

Figure 6 Switch 4900 SX — rear view

Download from Www.Somanuals.com. All Manuals Search And Download.

Switch — Rear View Detail

Figure 7 Switch 4924 — rear view

Figure 8 Switch 4950 — rear view

Unit Information This label shows the following:

Label

■

The 3Com product name of the Switch

The 3Com 3C number of the Switch

The unique MAC address (Ethernet address) of the Switch

The serial number of the Switch

You may need this information for fault reporting purposes.

Power Socket The Switch automatically adjusts its power setting to any supply voltage

in the range 90-240 VAC.

Redundant Power To protect against internal power supply failure, you can use this socket

System Socket to connect a SuperStack 3 Advanced Redundant Power System (RPS) to

the Switch. See “Connecting a Redundant Power System” on page 27.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

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

local out-of-band management. The console port uses a standard null

modem cable and is set to auto-baud (up to a maximum of 19200 baud),

8 data bits, no parity and 1 stop bit.

Expansion Module You can use this slot to install an Expansion Module. Contact your

Slot supplier for further information on the range of Expansion Modules

supported by your Switch.

WARNING: When an Expansion Module is not installed, ensure the

blanking plate is fitted by tightening all screws with a suitable tool.

Default Settings

Table 5 shows the default settings for the Switches. If you initialize one of

the Switch units, it is returned to these defaults.

Table 5 Default Setting

Feature

Switch 4900 Series

Enabled

Port Status

Port Speed

Auto-negotiated

Enabled

Duplex Mode

Flow Control

Broadcast Storm Control

High threshold: 3000 broadcast frames per

second — Notify and filter

Low threshold: 1500 broadcast frames per

second — Notify and unfilter

Virtual LANs (VLANs)

All ports belong to the untagged Default VLAN

(VLAN 1)

Multicast Filtering

IGMP filtering enabled

Enabled

Rapid Spanning Tree Protocol

Link Aggregation Control

Protocol (LACP)

Enabled

Smart Auto-sensing

Switch 4900, 4924, and 4950: Enabled

Switch 4900 SX: Not applicable

IP Address

169.254.100.100^*

Subnet Mask

255.255.0.0

* This default IP address is used if the unit is operating in standalone mode, and/or no other

Switches on the network have this IP address. If this default IP address is already in use then the

Switch detects this and configures itself with an IP address in the range 169.254.1.0 to

169.254.254.255.

Download from Www.Somanuals.com. All Manuals Search And Download.

INSTALLING THE SWITCH

This chapter contains the information you need to install and set up the

Switch. It covers the following topics:

■

Package Contents

Choosing a Suitable Site

Rack-mounting

Placing Units On Top of Each Other

Creating an XRN Distributed Fabric

The Power-up Sequence

Switch 4950 — GBIC Operation

WARNING: Safety Information. Before installing or removing any

components from the Switch or carrying out any maintenance

procedures, you must read the safety information provided in Appendix A

of this guide.

AVERTISSEMENT: Consignes de sécurité. Avant d'installer ou d'enlever

tout composant du Switch ou d'entamer une procédure de maintenance,

lisez les informations relatives à la sécurité qui se trouvent dans

l'Appendice A de ce guide.

VORSICHT: Sicherheitsinformationen. Bevor Sie Komponenten aus

dem Switch entfernen oder dem Switch hinzufuegen oder

Instandhaltungsarbeiten verrichten, lesen Sie die

Sicherheitsanweisungen, die in Anhang A in diesem Handbuch

aufgefuehrt sind.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

Package Contents

■

Switch unit

CD-ROM

This Guide

Management Quick Reference Guide

Release Notes

Warranty Flyer

Power Cord

2 x securing brackets

6 x screws

4 x rubber feet

Choosing a Suitable

Site

The Switch is suited for use in an internal wiring closet, a network room,

or telecommunications room, where it can be mounted in a standard

19-inch equipment rack, or free-standing.

CAUTION: Ensure that the ventilation holes are not obstructed.

To ensure this product provides optimum performance, high speed fans

are used to provide ventilation. These fans have a high audible output.

When deciding where to position the Switch, ensure that:

■

Cabling is located away from:

■

sources of electrical noise such as radios, transmitters and

broadband amplifiers.

■

power lines and fluorescent lighting fixtures.

■

The Switch is accessible and cables can be connected easily.

Water or moisture cannot enter the case of the Switch.

Air flow is not restricted around the Switch or through the vents in the

side of the Switch. 3Com recommends that you provide a minimum of

25 mm (1 in.) clearance.

■

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

If the Switch is installed in a 19-inch rack or closed assembly its local air

temperature may be greater than room ambient temperature.

Download from Www.Somanuals.com. All Manuals Search And Download.

Rack-mounting

■

The air is as free from dust as possible.

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

No more than four Switch units are placed on top of one another, if

the units are free-standing.

■

The Switch is situated away from sources of conductive (electrical)

dust, for example laser printers.

The AC supply used by the Switch is separate to that used by units

that generate high levels of AC noise, for example air conditioning

units and laser printers.

Rack-mounting

The Switch is 1.5U and will fit in most standard 19-inch racks. However,

as each Switch requires a shelf or runner to support its weight, you may

need to allow a 2U space within the rack for each Switch.

WARNING: The Switch should only be used in a rack if it is mounted on

runners, a shelf, or a tray to support the weight. The rack-mount kits

alone are not sufficient to support the weight of the switch. The rack-

mount kits must not be used to suspend the Switch from under a table or

desk, or attach it to a wall.

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.

CAUTION: You must use a shelf or support that will not obstruct the air

flow through the side panels of the Switch.

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 securing bracket over the mounting holes on one side of the

Switch, as shown in Figure 9.

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

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

Figure 9 Fitting a bracket for rack-mounting

You must use the screws supplied with the securing brackets. Damage

caused to the unit by using incorrect screws invalidates your warranty.

4 Repeat steps 2 and 3 for the other side of the Switch.

5 Insert the Switch into the 19-inch rack and secure with suitable screws

(not provided). Ensure that ventilation holes are not obstructed.

6 Connect network cabling.

Placing Units On

Top of Each Other

If the Switch units are free-standing, up to four units can be placed one

on top of the other. If you are mixing a variety of SuperStack^®3 Switch

and Hub units, the smaller units must be positioned at the top.

If you are placing Switch units one on top of the other, you must use the

self-adhesive rubber pads supplied. Apply the pads to the underside of

each Switch, sticking one in the marked area at each corner. Place the

Switch units on top of each other, ensuring that the pads of the upper

unit line up with the recesses of the lower unit.

Creating an XRN

Distributed Fabric

Switch 4900 Series units and 3Com Switch 4050/4060 units can be

interconnected to create an XRN Distributed Fabric and then treated as a

single manageable unit with one IP address. A combination of any two of

these units is allowed to be interconnected.

Download from Www.Somanuals.com. All Manuals Search And Download.

Creating an XRN Distributed Fabric

How To Interconnect To interconnect any two Switch 4900 Series or Switch 4050/4060 units

Units you will need to order the XRN Interconnect Module Kit (3C17715). The

kit consists of two XRN Interconnect Modules and an Interconnect Cable.

Both Switches must have an unused expansion slot to allow an

Interconnect Module to be fitted.

Figure 10 Interconnecting two Switch 4900 units

itc

ria

SUPPL

V-

240

Console

(max) 19200,8,1,N

Unit

sole

19200

Unit

ax)

,8,1,N

Activity

S/N: XXXX/7XXXXXXXXX

ivity

Status

itc

ria

XRN Inter

RN Inter

connect Module (3C17716)

ect Module (3C17716)

SUPPL

V-

240

Console

(max) 19200,8,1,N

ax) 19200,8,1,N

Unit

Activity

ctiv

S/N: XXXX/7XXXXXXXXX

Status

tatu

XRN Inter

connect Module (3C17716)

)

For information on ordering the XRN Interconnect Kits contact your

supplier. For illustrations and information on how to install the XRN

Interconnect Kits, refer to the user documentation that accompanies

these Kits.

Rules For This information is also provided in the user documentation that

Interconnecting Units accompanies the XRN Interconnect Kits.

■

The maximum number of Switch units that can be interconnected is

two.

■

XRN Interconnect Modules are NOT hot-swappable or hot-insertable.

Ensure that the Switch is powered off before inserting or removing an

Interconnect Module.

■

Only 3Com XRN Interconnect Cables can be used to connect two

Interconnect Modules.

It is not possible to interconnect the Switch 4900 Series and Switch

4050/4060 units with any other 3Com device.

3Com strongly recommends that you upgrade all Switches to be

interconnected to the latest software agent.

3Com recommends that you initialize a Switch unit that has previously

been used elsewhere in your network before you interconnect to an

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

existing unit. If you do not initialize the unit, problems may be caused

by conflicting Switch configurations.

■

When the Switch units are interconnected they are assigned a unit

number dependent on which XRN Interconnect Cable end is

connected to which Switch. That is, the Switch with the blue cable

end will be assigned the identity of Unit 1 and the Switch with the

yellow cable end will be assigned the identity of Unit 2.

For a detailed description of how XRN Technology operates and

implementation guidelines, please refer to the Implementation Guide on

the CD-ROM that accompanies your Switch or on the 3Com Web site.

The Power-up

Sequence

The following sections describe how to get your Switch powered-up and

ready for operation.

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

Switch

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

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

The Switch powers-up and runs through its Power On Self Test (POST),

which takes approximately 10 seconds.

Checking for Correct During the Power On Self Test, all ports on the Switch are disabled and

Operation of LEDs the LEDs light in a rapid sequence.

When the POST has completed, check the Power/Self Test LED to make

sure that your Switch is operating correctly. Table 6 shows possible colors

for the LED.

Table 6 Power/Self Test LED Colors

Color

State

Green

The Switch is powered-up and operating

normally.

Yellow

Off

The Switch has failed its Power On Self Test

(POST) because of an internal problem.

The Switch is not receiving power.

Download from Www.Somanuals.com. All Manuals Search And Download.

The Power-up Sequence

If there is evidence of a problem, see “Solving Problems Indicated by

LEDs” on page 54 for a list of suggested solutions.

Connecting a You can connect a SuperStack 3 Advanced Redundant Power System to

Redundant Power the Switch. This unit, which is also known as an RPS, is designed to

System maintain the power to your Switch if a power supply failure occurs.

For normal redundancy, the unit requires one Type 3 Power Module (part

number 3C16075).

For full redundancy, the unit requires two Type 3 Power Modules

combined using a Type 3 Y-Cable (part number 3C16077).

WARNING: If you are connecting the Switch to a Type 3 Power Module,

read the Safety Information section in the Type 3 Power Module User

Guide.

CAUTION: The Switch can only use a SuperStack Advanced Redundant

Power System output.

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.

Choosing the Correct If your Switch has 10/100/1000BASE-T ports, these ports are Auto-MDIX,

10/100/1000BASE-T that is they have a cross-over capability. These ports can automatically

Cables detect whether to operate in MDI or MDIX mode. Therefore you can

make a connection to one of the ports with a straight-through (MDI) or a

cross-over cable (MDIX).

The Auto-MDIX feature only operates when auto-negotiation is enabled.

If auto-negotiation is disabled, all the Switch ports are configured as

MDIX (cross-over). If you want to make a connection to another MDIX

port, you need a cross-over cable. Many ports on workstations and

servers are configured as MDI (straight-through). If you want to make a

connection to an MDI port, you need to use a standard straight-through

cable. See Table 7.

3Com recommends that you use at least Category 5 twisted pair cable —

the maximum segment length for this type of cable is 100 m (328 ft).

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

Table 7 Cables required to connect the Switch to other devices if

auto-negotiation is disabled

Cross-over Cable

Straight-through Cable

Switch to Switch

(MDIX to MDIX)

■

Switch to Hub

(MDIX to MDIX)

■

Switch to PC (NIC)

(MDIX to MDI)

CAUTION: If you want to install the Switch using a Category 5E or

Category 6 cable, 3Com recommends that you briefly connect the cable

to a grounded port before connecting network equipment. If you do not,

the cable’s Electrostatic Discharge (ESD) may damage the Switch's port.

You can create a grounded port by connecting all wires at one end of a

UTP cable to an earth ground point, and the other end to a female RJ-45

connector located, for example, on a Switch rack or patch panel. The

RJ-45 connector is now a grounded port.

Choosing the Correct If your Switch has fiber ports you can choose from the following cable

Fiber Cables options:

■

The 1000BASE-SX ports can be connected to multimode fiber cables

only.

■

The 1000BASE-LX and 1000BASE-LH70 GBIC ports use multimode or

single-mode fiber optic cables.

CAUTION: 3Com recommends that you use MT-RJ cables that do not

contain alignment pins as these are provided by the fiber socket. Cables

that contain alignment pins can cause damage to your Switch.

For detailed information on fiber cable specifications, refer to the

SuperStack 3 Implementation Guide on the CD-ROM that accompanies

your Switch.

If you wish to connect a 1000BASE-SX MT-RJ port to a fiber port with a

different type of connector, for example, SC or ST please contact your

network supplier for a suitable patch cable.

Download from Www.Somanuals.com. All Manuals Search And Download.

Switch 4950 — GBIC Operation

Switch 4950 — GBIC

Operation

The following sections describes how to insert a GBIC transceiver into a

GBIC port on a Switch 4950.

GBIC transceivers are hot-insertable and hot-swappable. You can remove

them from and insert then into any GBIC port without having to power

down the Switch.

Approved GBIC The following list of approved GBIC transceivers is correct at the time of

Transceivers publication.

WARNING: The Switch must only be fitted with 3Com approved GBIC

transceivers, as listed below.

■

3CGBIC91 GBIC (SX)

3CGBIC92 GBIC (LX)

3CGBIC97 GBIC (LH70)

To access the latest list of approved GBIC transceivers for the Switch on

the 3Com Corporation World Wide Web site, enter this URL into your

internet browser:

http://www.3com.com

The URL is case sensitive.

Inserting a GBIC To be recognised as valid, the GBIC transceiver must have the following

Transceiver characteristics:

■

1000BASE-SX, 1000BASE-LX or 1000BASE-LH70 media type:

■

1000BASE-SX GBIC transceiver

Use this transceiver to connect the Switch directly to a multimode

fiber-optic cable.

■

1000BASE-LX GBIC transceiver

Use this transceiver to connect the Switch directly to a single-mode

fiber-optic cable or to multimode fiber using a conditioned launch

cable.

■

1000BASE-LH70 GBIC transceiver

Use this transceiver to connect the Switch directly to a single-mode

fiber-optic cable or to multimode fiber using a conditioned launch

cable.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

■

Fiber SC connector

Type 4 GBIC with internal EEPROM fitted.

If the GBIC transceiver is faulty, it will not operate within the Switch. See

“Solving Hardware Problems” on page 55.

Do not use non-3Com GBICs. If the GBIC transceiver is invalid it will not

be recognised by the Switch.

Use the following sequence of steps to activate the GBIC ports.

1 To insert one of the transceivers into a GBIC expansion port on the

Switch:

a Orient the transceiver so that the fiber-optic duplex subscriber

connecter (SC) is toward you, as shown in Figure 11.

b Gently slide the transceiver into the GBIC port until it clicks into place.

2 If you wish to remove the transceiver, compress the side tabs and gently

pull the transceiver out of the port.

CAUTION: GBIC transceivers are keyed and can be properly inserted only

one way. If the transceiver does not click when you insert it, remove it,

turn it over, and reinsert it.

Figure 11 Inserting a GBIC Transceiver into a Switch 4950

Download from Www.Somanuals.com. All Manuals Search And Download.

Switch 4950 — GBIC Operation

3 The transceiver connects to the network using a duplex SC connector.

Attach a male duplex SC connector on the network cable into the duplex

SC connector on the transceiver.

4 Connect the other end of the cable to a device fitted with an appropriate

Gigabit Ethernet connection.

5 Check the LEDs on the front of the Switch to ensure that it is operating

correctly. Refer to “LEDs” on page 17 for more information.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 2: INSTALLING THE SWITCH

Download from Www.Somanuals.com. All Manuals Search And Download.

SETTING UP FOR MANAGEMENT

Your Switch can operate in its default state, that is, you can install it and

it will work straight away (plug-and-play). However, to make full use of

the features offered by the Switch, and to change and monitor the way it

works, you have to access the management software that resides on the

Switch. This is known as managing the Switch.

Managing the Switch can help you to improve the efficiency of the

Switch and therefore the overall performance of your network.

This chapter explains the initial set up of the Switch and the different

methods of accessing the management software to manage a Switch. It

covers the following topics:

■

Setting Up Overview

Manually Configuring IP Information

Viewing Automatically Configured IP Information

Methods of Managing a Switch

Setting Up Command Line Interface Management

Setting Up Web Interface Management

Setting Up SNMP Management

Default Users and Passwords

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Setting Up

Overview

This section gives an overview of what you need to do to get your Switch

set up and ready for management when it is in its default state. The

whole setup process is summarised in Figure 12. Detailed procedural

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

■

Configure IP information manually for your Switch or view the

automatically configured IP information

■

Prepare for your chosen method of management

Figure 12 Initial Switch Setup and Management Flow diagram

Power Up the Switch.

IP Information is automatically configured.

See page 35

Do you want to manually

configure the IP information?

Yes

How do you want to view the automatically

configured IP information?

How do you want to connect to the Switch?

Connect to a front

panel port and use the

Web Interface or

Connect to the console

Use 3Com Network

Supervisor (3NS).

See page 43

Connect to the console

port and use the

Command Line

Interface.

port and use the

Command Line

Interface.

Command Line Interface.

See page 37

See page 44

How do you want to manage your Switch? See page 46

SNMP

See page 51

Command Line Interface

Web Interface

Connect via the

console port.

See page 48

Connect over the

network via Telnet.

See page 48

Connect over the

network.

See page 50

CAUTION: To protect your Switch from unauthorized access, you must

change all three default passwords as soon as possible, even if you do not

intend to actively manage your Switch. For more information on default

Download from Www.Somanuals.com. All Manuals Search And Download.

Setting Up Overview

users and changing default passwords, see “Default Users and

Passwords” on page 51.

IP Configuration You can use one of the following methods to allocate IP information to

your Switch (essential if you wish to manage your Switch across the

network).

Manual IP Configuration

You can choose to configure the IP information yourself. The Switch

remembers the information that you enter until you change it again or

set the configuration method to Automatic.

You should use the Manual IP configuration method if:

■

you do not have a DHCP or BootP server on your network, or

you want to remove the risk of the IP address ever changing, or

your DHCP or BootP server does not allow you to allocate static IP

addresses. (Static IP addresses are necessary to ensure that the Switch

is always allocated the same IP information.)

For most installations, 3Com recommends that you configure the Switch

IP information manually. This makes management simpler and more

reliable as it is not dependent on a DHCP or BootP server, and eliminates

the risk of the IP address changing.

If you wish to manually enter IP information for your Switch, work

through the “Manually Configuring IP Information” section on page 37.

Automatic IP Configuration

By default the Switch tries to configure itself with IP information without

requesting user intervention. It tries to obtain an IP address from a DHCP

or BootP server on the network.

If neither server is found, the Switch will configure itself with its default IP

address 169.254.100.100 if it is operating in a standalone mode, and/or

no other Switches on the network have this IP address. If this default IP

address is already in use on the network then the Switch detects this and

configures itself with an IP address in the range 169.254.1.0 to

169.254.254.255.

This process is known as Auto-IP and is the same mechanism used by

Windows 98 and Windows 2000. IP addresses configured by Auto-IP are

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

temporary as they cannot be routed but are useful for small networks

which are not connected to other networks, or for initial configuration.

However, as soon as a DHCP or BootP server is detected, the Switch will

configure itself with the IP address allocated by that server.

When using automatic IP configuration it is important that the IP address

of the Switch is static, otherwise you will not know what the IP address is

and it will be difficult to manage. Most DHCP and BootP servers allow

static IP addresses to be configured so that you know what IP address will

be allocated to the Switch. Refer to the documentation that accompanies

your DHCP/BootP server.

For a detailed description of how automatic IP configuration operates,

please refer to the Implementation Guide on the CD-ROM that

accompanies your Switch or on the 3Com Web site.

You should use the automatic IP configuration method if:

■

your network uses DHCP or BootP to allocate IP information, or

■

flexibility is needed. If the Switch is re-deployed onto a different

subnet, it will automatically reconfigure itself with an appropriate IP

address, instead of you having to manually reconfigure the Switch.

If you use the automatic IP configuration method, you need to discover

the automatically allocated IP information before you can begin

management. Work through the “Viewing Automatically Configured IP

Information” section on page 43.

Preparing for Once your Switch’s initial set up is complete you can set up your chosen

Management management method as described in “Methods of Managing a Switch”

on page 46.

For detailed information about the specific web interface operations and

command line interface commands and problem solving, refer to the

“Management Interface Reference Guide” on the CD-ROM that is

supplied with the Switch or on the 3Com Web site.

Download from Www.Somanuals.com. All Manuals Search And Download.

Manually Configuring IP Information

Manually

Configuring IP

Information

You can manually configure the Switch IP information in the following

ways:

■

Connecting to a front panel port — Connect a workstation using an

Ethernet cable to a front panel port of the Switch. You can then

manually enter IP information using the web interface or the

command line interface (CLI).

■

Connecting to the console port — Connect a workstation using a

console cable to the console port of the Switch. You can then

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

Connecting to a Front To set up your Switch manually you can make a connection to a front

Panel Port panel port. You must do this whilst the Switch is offline, that is, before

you connect the Switch to a network.

The procedure described in this section assumes the unit has been

powered up in standalone mode and has the default IP address of

169.254.100.100.

Pre-requisites

■

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

A Network Interface Card (NIC).

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

A suitable Web browser — refer to “Choosing a Browser”on page 49.

You need to have the following so that you can manually set up the

Switch with IP information:

■

IP address

subnet mask

default gateway

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Connecting the Workstation to the Switch

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

shown in Figure 13.

Figure 13 Connecting a workstation to the Switch via a front panel port

To connect the cable:

a Attach an RJ-45 connector at one end of the Ethernet cable to the

Network Interface Card (NIC) in the workstation.

b Connect the RJ-45 connector at the other end of the cable to one of

the front panel ports on the Switch.

Do not interconnect the Switch to any other unconfigured Switch.

Configuring the Workstation with IP Information

You need to change the IP address and subnet mask of the workstation

that you have connected to the Switch. Make a note of the existing

settings so you can return to them later. Change the workstation to the

following settings:

■

IP address — 169.254.100.99

Subnet mask — 255.255.0.0

■

Setting Up the Switch with IP Information

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

can do this using the Web interface or the command line interface (CLI)

via telnet.

Using the Web Interface

1 Power-up the Switch. This takes approximately one minute.

2 Open a suitable Web browser and enter 169.254.100.100in the

Location Address field. This is the default IP address that is automatically

assigned to an offline unit.

Download from Www.Somanuals.com. All Manuals Search And Download.

Manually Configuring IP Information

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

address.

3 At the login and password prompts, enter adminas your user name and

press Return at the password prompt (default user name and password).

If you have logged on correctly, a set of Getting Started pages are

displayed.

4 The Getting Started pages allow you to enter basic setup information for

the Switch. Select Manualand then enter the IP address, subnet mask,

and default gateway that you want the Switch to use when it is

connected to the network. The final page displays a summary of the

information entered.

The initial set up of your Switch is now complete and the Switch is ready

for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 46.

Using Command Line Interface via Telnet

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

95/98/2000/NT.

a Click Run.

b In the dialogue box that appears type the default IP address of the

unit, that is: Telnet 169.254.100.100

c Click OK.

2 Press Enter to open a login prompt.

If the login prompt does not begin immediately, press Return a few times

until it starts.

3 At the login and password prompts, enter adminas your user name and

press Return at the password prompt. If you have logged on correctly, the

top-level menu of the command line interface is displayed as shown in

the example in Figure 14.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Figure 14 Example top-level command line interface menu

4 At the Select menu option prompt you can either:

■

enter the protocol ip basicConfigcommand. At the Enter

configuration methodprompt enter manual. The screen

prompts you to enter IP information.

■

enter the gettingStarted command. At the Enter

configuration methodprompt enter manual. The screen

prompts you to enter IP information.

5 Enter the IP address, subnet mask, and gateway IP address for the Switch.

The screen displays a summary of the information entered.

If using the gettingStartedcommand you will then be prompted to

enter system information, change passwords, and then given the option

to carry out advanced configuration.

The initial set up of your Switch is now complete and the Switch is ready

for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 46.

Connecting to the To set up your Switch manually you can alternatively make a connection

Console Port to the console port (this example describes a local connection to the

console port, rather than a remote one via a modem). You can do this

whilst the Switch is offline, that is, before you connect the Switch to a

network, or whilst the Switch is online, that is, connected to a network.

Pre-requisites

■

A workstation with terminal emulation software installed, such as

Microsoft Hyperterminal. This software allows you to communicate

with the Switch via the console port directly, or through a modem.

Download from Www.Somanuals.com. All Manuals Search And Download.

Manually Configuring IP Information

■

Documentation supplied with the terminal emulation software.

A suitable cable:

■

A standard null modem cable — if you are connecting directly to

the console port, or

■

A standard modem cable — if you are connecting to the console

port using a modem.

You can find pin-out diagrams for both cables in Appendix B on page 69.

■

You need to have the following so that you can manually set up the

Switch with IP information:

■

IP address

subnet mask

default gateway

Connecting the Workstation to the Switch

1 Connect the workstation to the console port using a standard null

modem cable as shown in Figure 15.

Figure 15 Connecting a workstation to the Switch via the console port

To connect the cable:

a Attach the female connector on the cable to the male connector on

the console port of the Switch.

b Tighten the retaining screws on the cable to prevent it from being

loosened.

c Connect the other end of the cable to one of the serial ports (also

known as a COM port) on your workstation.

2 Open your terminal emulation software and configure the COM port

settings to which you have connected the cable. The settings should be

set to match the default settings for the Switch, which are:

■

19,200 baud

8 data bits

■

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

■

no parity

1 stop bit

no hardware flow control

Refer to the documentation that accompanies the terminal emulation

software for more information.

Setting Up the Switch with IP Information

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

using the command line interface.

1 The command line interface login sequence begins as soon as the Switch

detects a connection to its console port.

If the login prompt does not begin immediately, press Return a few times

until it starts.

2 At the login and password prompts, enter adminas your user name and

press Return at the password prompt. If you have logged on correctly, the

top-level menu of the command line interface is displayed as shown in

the example in Figure 16.

Figure 16 Example top-level command line interface menu

3 At the Select menu option prompt you can either:

■

enter the protocol ip basicConfigcommand. At the Enter

configuration methodprompt enter manual. The screen

prompts you to enter IP information.

■

enter the gettingStarted command. At the Enter

configuration methodprompt enter manual. The screen

prompts you to enter IP information.

Download from Www.Somanuals.com. All Manuals Search And Download.

Viewing Automatically Configured IP Information

4 Enter the IP address, subnet mask, and gateway IP address for the Switch.

The screen displays a summary of the information entered.

If using the gettingStartedcommand you will then be prompted to

enter system information, change passwords, and then given the option

to carry out advanced configuration.

The initial set up of your Switch is now complete and the Switch is ready

for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 46.

If you do not intend to use the command line interface via the console

port to manage the Switch, you can logout, disconnect the serial cable

and close the terminal emulator software.

Viewing

If you allow the Switch to automatically configure its own IP information

you need to discover and view the IP information before you can begin to

manage the Switch. You can discover the IP information in two ways:

Automatically

Configured IP

Information

■

Using 3Com Network Supervisor — This application will auto-discover

the Switch and display the automatically allocated IP information

assigned to the Switch.

■

Connecting to the Console Port — Connect a workstation using a

console cable to the console port of the Switch. You can then view the

IP information automatically assigned to the Switch using the

command line interface (CLI).

Using 3Com Network You can use the 3Com Network Supervisor application provided on the

Supervisor CD-ROM that accompanies your Switch to discover the automatically

allocated IP information.

1 Connect your Switch to the network.

2 Power-up the Switch and wait for two minutes.

3 Launch 3Com Network Supervisor and run the Auto-discovery wizard.

3Com Network Supervisor will auto-discover the new Switch and display

the IP information that has been automatically allocated to the Switch.

Most DHCP and BootP servers allow static IP addresses to be configured

so that you know what IP address the Switch will be given. Refer to the

documentation that accompanies your DHCP or BootP server.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

If your network does not have a DHCP or BootP server, the workstation

running 3Com Network Supervisor must be on the same subnet as the

Switch, because Auto-IP addresses are non-routable.

Connecting to the Alternatively, you can view the automatically configured IP information

Console Port via the command line interface (CLI) through a connection to the console

port. (This example describes a local connection to the console port,

rather than a remote one via a modem.)

Pre-requisites

■

A workstation with terminal emulation software installed, such as

Microsoft Hyperterminal. This software allows you to communicate

with the Switch via the console port directly, or through a modem.

■

Documentation supplied with the terminal emulation software.

A suitable cable:

■

A standard null modem cable — if you are connecting directly to

the console port, or

■

A standard modem cable — if you are connecting to the console

port using a modem.

You can find pin-out diagrams for both cables in Appendix B on page 69.

■

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

connect your Switch to the network.

Connecting the Workstation to the Switch

1 Connect the workstation to the console port using a standard null

modem cable as shown in Figure 17.

Figure 17 Connecting a workstation to the Switch via the console port

To connect the cable:

a Attach the female connector on the cable to the male connector on

the console port of the Switch.

Download from Www.Somanuals.com. All Manuals Search And Download.

Viewing Automatically Configured IP Information

b Tighten the retaining screws on the cable to prevent it from being

loosened.

c Connect the other end of the cable to one of the serial ports (also

known as a COM port) on your workstation.

2 Open your terminal emulation software and configure the COM port

settings to which you have connected the cable. The settings should be

set to match the default settings for the Switch, which are:

■

19,200 baud

8 data bits

no parity

1 stop bit

no hardware flow control

Refer to the documentation that accompanies the terminal emulation

software for more information.

Viewing IP Information via the Console Port

You are now ready to view the automatically allocated IP information

using the command line interface.

1 Connect your Switch to the network using an Ethernet cable. As soon as

a network connection is made the Switch begins the automatic IP

configuration process.

The automatic IP configuration process usually completes within one

minute.

If there is no response from a DHCP server within 30 seconds, the Auto-IP

configuration mechanism attempts to allocate the default IP address

169.254.100.100. If this address is not available, it then allocates an IP

address in the range of 169.254.x.y (where x is in the range 1 to 254, and

y is in the range 0 to 255).

2 The command line interface login sequence begins as soon as the Switch

detects a connection to its console port.

If the login prompt does not begin immediately, press Return a few times

until it starts.

3 At the login and password prompts, enter adminas your user name and

press Return at the password prompt. If you have logged on correctly, the

top-level menu of the command line interface is displayed as shown in

the example in Figure 18.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Figure 18 Example top-level command line interface menu

4 At the Select menu option prompt enter the protocol ip

interface summarycommand. At the Select IP interfaces

prompt enter all. A summary of the automatically allocated IP

information is displayed. Make a note of the Network IP Address.

The initial set up of your Switch is now complete and the Switch is ready

for you to set up your chosen management method. See “Methods of

Managing a Switch” on page 46.

If you do not intend to use the command line interface via the console

port to manage the Switch, you can disconnect the serial cable and close

the terminal emulator software.

Methods of

Managing a Switch

Once you have completed the initial set up of your Switch, you can

decide how you wish to manage the Switch. You can use one of the

following methods:

■

Command line interface management

Web interface management

SNMP management

Command Line Each Switch has a command line interface (CLI) that allows you to

Interface manage the Switch from a workstation, either locally via a console port

Management connection (see Figure 19), or remotely over the network (see Figure 20).

Download from Www.Somanuals.com. All Manuals Search And Download.

Methods of Managing a Switch

Figure 19 CLI management via the console port

Figure 20 CLI management over the network

Refer to “Setting Up Command Line Interface Management” on

page 48.

Web Interface Each Switch has an internal set of web pages that allow you to manage

Management the Switch using a Web browser remotely over an IP network (see

Figure 21).

Figure 21 Web interface management over the network

Refer to “Setting Up Web Interface Management” on page 49.

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

running the Simple Network Management Protocol (SNMP) as shown in

Figure 22. For example, you can use the 3Com Network Supervisor

software that is provided on the CD-ROM that accompanies your Switch.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Figure 22 SNMP management over the network

Refer to “Setting Up SNMP Management” on page 51.

Setting Up

This section describes how you can set up command line interface

management using a local console port connection or over the network.

Command Line

Interface

Management

CLI Management via To manage a Switch using the command line interface via the local

the Console Port console port connection:

1 Ensure you have connected your workstation to the console port correctly

as described in “Connecting to the Console Port” on page 40.

2 Your Switch is now ready to continue being managed and/or configured

through the CLI via its console port.

CLI Management over To manage a Switch using the command line interface over a network

the Network using Telnet:

1 Ensure you have already set up the Switch with IP information as

described in “Setting Up Overview” on page 34.

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

management workstation. You can check this by trying to browse the

World Wide Web. If you can browse, the IP protocol is installed.

3 Check you can communicate with the Switch by entering a ping

command at the DOS prompt in the following format:

c:\ ping xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If you get an error message, check that your IP information has been

entered correctly and the Switch is powered up.

4 To open a Telnet session via the DOS prompt, enter the IP address of the

Switch that you wish to manage in the following format:

Download from Www.Somanuals.com. All Manuals Search And Download.

Setting Up Web Interface Management

>telnet xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If opening a Telnet session via third party software you will need to enter

the IP address in the format suitable for that software.

5 At the login and password prompts, enter adminas your user name and

press Return at the password prompt (or the password of your choice if

you have already modified the default passwords).

If the login prompt does not display immediately, press Return a few

times until it starts.

6 If you have logged on correctly, the top-level menu of the command line

interface for the Switch you wish to manage is displayed as shown in

Figure 16 on page 42.

Setting Up Web

Interface

Management

This section describes how you can set up web interface management

over the network.

Pre-requisites

■

Ensure you have already set up the Switch with IP information as

described in “Setting Up Overview” on page 34.

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

5 twisted pair Ethernet cable with RJ-45 connectors.

A suitable Web browser.

Choosing a Browser

To display the web interface correctly, use one of the following Web

browser and platform combinations:

Table 8 Supported Web Browsers and Platforms

WindowsNT

Windows

2000

Solaris

2.6

Windows 95 Windows 98

Windows XP

Netscape 4.76

Netscape 6.2

■

Internet Explorer

5.0, 5.5 and 6.0

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

For the browser to operate the web interface correctly, JavaScript and

Cascading Style Sheets must be enabled on your browser. These features

are enabled on a browser by default. You will only need to enable them if

you have changed your browser settings.

To enable style sheets in Netscape Navigator 4.76 on Solaris 2.6, open

Netscape Navigator and select Edit > Preferences > Fonts. Select the Use

document-specified fonts, including Dynamic Fonts radio button. You

should also set the font sizes as follows:

■

Variable Width Font - Size 10.0

Fixed Width Font - Size 12.0

This ensures that the text spacing is correct. Finally in the Advanced

category ensure that Enable JavaScript and Enable style sheets are

checked.

Web Management To manage a Switch using the web interface over an IP network:

Over the Network

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

management workstation. You can check this by trying to browse the

World Wide Web. If you can browse, the IP protocol is installed.

2 Check you can communicate with the Switch by entering a ping

command at the DOS prompt in the following format:

c:\ ping xxx.xxx.xxx.xxx

(where xxx.xxx.xxx.xxx is the IP address of the Switch)

If you get an error message, check that your IP information has been

entered correctly and the Switch is powered up.

3 Open your web browser and enter the IP address of the Switch that you

wish to manage in the URL locator, for example, in the following format:

http://xxx.xxx.xxx.xxx

4 At the login and password prompts, enter adminas your user name and

press Return at the password prompt (or the password of your choice if

you have already modified the default passwords).

5 Click on the Device View button to display the web management options.

Download from Www.Somanuals.com. All Manuals Search And Download.

Setting Up SNMP Management

Setting Up SNMP

Management

Any network management application running the Simple Network

Management Protocol (SNMP) can manage a Switch if:

■

The correct Management Information Bases (MIBs) are installed on the

management workstation.

■

The management workstation is connected to the Switch using a port

in VLAN 1 (the Default VLAN). By default, all ports on the Switch are in

VLAN 1.

You can use the 3Com Network Supervisor application that is provided on

the CD-ROM that accompanies your Switch to provide SNMP

management for your Switch. If you use 3Com Network Supervisor it

automatically loads the correct MIBs and necessary files onto your

workstation.

Pre-requisites

■

Documentation supplied with the SNMP network management

application software.

To manage your Switch using an SNMP network management

application, you need to specify SNMP community strings for the users

defined on the Switch. You can do this using the command line interface

system management snmp communitycommand — refer to the

command line interface section of the “Management Interface Reference

Guide” for more information.

Default Users and

Passwords

If you intend to manage the Switch using the web interface or the

command line interface, or to change the default passwords, you need to

user names, and each user name has a different password and level of

access. These default users are listed in Table 9.

CAUTION: To protect your Switch from unauthorized access, you must

change all three default passwords as soon as possible, even if you do not

intend to actively manage your Switch

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 3: SETTING UP FOR MANAGEMENT

Table 9 Default Users

User

Name

Default

Password Access Level

monitor

monitor — the user can view all manageable parameters,

except special/security features, but cannot change any

manageable parameters.

manager manager

admin (no

manager — the user can access and change the

operational parameters but not special/security features

security — the user can access and change all manageable

password) parameters

Use the admin default user name (no password) to login and carry out

initial Switch setup.

Changing Default You can change the default passwords using either:

Passwords

■

The gettingStartedcommand on the CLI, or

The security device user modifycommand on the CLI, or

The Security > Device > User > Modify operation on the web interface.

For more information about default users and passwords, refer to the

“Management Interface Reference Guide” on the Switch CD-ROM.

Download from Www.Somanuals.com. All Manuals Search And Download.

PROBLEM SOLVING

This chapter helps you to diagnose and solve problems you may have

with the operation of your Switch. There is also an explanation of IP

addressing.

The topics covered are:

■

Solving Problems Indicated by LEDs

Solving Hardware Problems

Solving Communication Problems

Solving Software Upgrade Problems

If you experience a problem that is not listed here, it may be included in

the support section of the Superstack 3 Switch Management Interface

Reference Guide on the CD-ROM that accompanies your Switch.

To ensure this product provides optimum performance, high speed fans

are used to provide ventilation. These fans have a high audible output.

For Technical Support information, see Appendix D.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 4: PROBLEM SOLVING

Solving Problems

Indicated by LEDs

If the LEDs on the Switch indicate a problem, refer to the list of suggested

solutions below.

The Power LED does not light

Check that the power cable is firmly connected to the Switch and to the

supply outlet. If the connection is secure and there is still no power, you

may have a faulty power cord or an internal fault. Firstly, check the power

cord by:

■

testing it in another device

■

connecting a working power cord to the ‘problem’ device

then contact your supplier for advice.

On powering-up, the Power/Self Test LED lights yellow

The Switch unit has failed its Power On Self Test (POST) because of an

internal problem. The fault type will be indicated on the unit LEDs.

Contact your supplier for advice.

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

light

Check that:

■

The Switch and the device at the other end of the link (or cable) are

connected securely.

■

The devices at both ends of the link are powered-up

The quality of cable is satisfactory

Auto-negotiation settings are the same at both ends.

Auto-negotiation problems will occur with 10BASE-T or 100BASE-T

where auto-negotiation is disabled and incorrect cables are being used

(cross-over or straight)

Auto-negotiation problems will occur with fiber if:

■

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

swapped

■

Fibers are broken

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

end and not at the auto-negotiation end)

Download from Www.Somanuals.com. All Manuals Search And Download.

Solving Hardware Problems

Solving Hardware

Problems

In the rare event of your Switch unit experiencing a hardware failure,

refer to the list of suggested solutions below.

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

Ensure that the expansion module is fully seated in the slot and the

connectors are engaged so that the securing screws can be tightened.

A fan failure warning message is received

Your Switch has a fan monitoring system that will generate fan failure

warning messages. Fan failure could potentially reduce the lifetime of the

Switch. The monitoring system polls the fan status at periodic intervals

while the unit is powered up.

Should one fan failure occur in the Switch, a warning message will be

generated in the following ways:

■

RMON Email Notification — If configured, you will receive

notification of the fan failure via email, SMS (Short Message Service),

or pager.

■

RMON Trap — If configured, an RMON trap is generated and sent to

the management workstation.

For further information about RMON, refer to “Chapter 7: Status

Monitoring and Statistics” in the Switch Implementation Guide supplied

in PDF format on the CD-ROM that accompanies the Switch.

If more than one fan fails in the Switch, a warning message will be

generated by RMON Email Notification, RMON Trap and also in the

following ways:

■

Command Line Interface — An indication of a general hardware

failure is provided through the Top level menu displayed when logging

on to the CLI. For more detailed information about the failure select

the system summarycommand.

■

Web interface — An indication of fan failure is provided through the

Device Summary table for the specific unit. In addition all Summary

tables turn red to indicate the fan failure.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 4: PROBLEM SOLVING

If a fan failure warning message is generated:

1 Power off the unit.

2 Check that the air vents are not obstructed.

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

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

RPS supply.

4 If another fan failure warning message is generated via the Command

Line Interface or the Web interface, return the unit.

Unit fails, no SNMP fan failure message is received

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

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

RPS supply.

2 Check the command line interface (system summary command) to

determine whether a thermal shutdown has occurred.

3 If no, return the unit:

If yes, check that:

■

The air vents are not obstructed.

■

The ambient temperatures and environmental conditions meet those

specified in Appendix C.

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

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

Error message indicating that the GBIC transceiver is invalid

The Switch has identified that the GBIC does not meet the minimum

requirements for the Switch and has disabled the port. To correct this

problem, completely remove the GBIC and replace it with a 3Com

approved GBIC. See “Approved GBIC Transceivers”on page 29

Error message indicating that the GBIC transceiver is faulty

To correct this problem, completely remove the GBIC and then reinsert it.

If the problem persists, contact 3Com Technical Support.

Download from Www.Somanuals.com. All Manuals Search And Download.

Solving Communication Problems

Solving

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

Communication

Problems

■

The Switch IP address has been configured.

■

If the Switch is separated from your management application by a

router, ensure that the default gateway IP address within the Switch is

the same as the IP address of the router.

■

The Switch’s IP address has been entered correctly in your network

management application (for example 3Com Network Supervisor).

The following is an brief overview of IP addressing, and how to obtain a

registered IP address.

IP Addressing

To be managed correctly, each device on your network (for example a

Switch or Hub) must have a unique IP address. IP addresses have the

format n.n.n.n where n is a decimal number between 0 and 255. An

example IP address is 192.168.100.8.

The IP address is split into two parts:

■

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

which the device resides

■

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

network

The natural subnet mask for this example is 255.255.255.0.

If your network has a connection to the external IP network, that is, you

access the Internet, you must apply for a registered IP address.

Download from Www.Somanuals.com. All Manuals Search And Download.

CHAPTER 4: PROBLEM SOLVING

How do you obtain a registered IP Address?

The IP registration system ensures that every IP address used is unique; if

you do not have a registered IP address, you may be using an identical

address to someone else and your network will not operate correctly.

InterNIC Registration Services is the organization responsible for

supplying registered IP addresses. The following contact information is

correct at time of publication:

World Wide Web site: http://www.internic.net

If your IP network is internal to your organization only, that is, you do not

access the Internet, you may use any arbitrary IP address as long as it is

not being used by another device on your network. 3Com suggests you

use addresses in the series 192.160.100.X (where X is a number between

1 and 254) with a subnet mask of 255.255.255.0. These suggested IP

addresses are part of a group of IP addresses that have been set aside

specially for use ‘in house’ only.

These suggested IP addresses are part of a group of IP addresses that

have been set aside specially for use ‘in house’ only.

Solving Software

Upgrade Problems

You can upgrade the management software of the Switch by using the

System > Control > Software Upgrade operation in the Web Interface, or

the system control softwareUpgradecommand in the

command line interface. For details on these options, refer to the

Management Interface Reference Guide supplied in HTML format on the

CD-ROM that accompanies your Switch.

If you have problems with your software upgrade, refer to the Problem

Solving section in the Management Interface Reference Guide.

Download from Www.Somanuals.com. All Manuals Search And Download.

SAFETY INFORMATION

You must read the following safety information before carrying out any

installation or removal of components, or any maintenance procedures

on the Switch 4900, 4900 SX, 4924, or 4950.

WARNING: Warnings contain directions that you must follow for your

personal safety. Follow all directions carefully.

You must read the following safety information carefully before you

install or remove the unit.

AVERTISSEMENT: Les avertissements présentent des consignes que vous

devez respecter pour garantir votre sécurité personnelle. Vous devez

respecter attentivement toutes les consignes.

Nous vous demandons de lire attentivement les consignes suivantes de

sécurité avant d’installer ou de retirer l’appareil.

VORSICHT: Vorsicht enthalten Anweisungen, die Sie zu Ihrer eigenen

Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig zu

befolgen.

Sie müssen die folgenden Sicherheitsinformationen’ sorgfältig

durchlesen, bevor Sie das Gerät installieren oder ausbauen.

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A: SAFETY INFORMATION

Important Safety Information

WARNING: Installation and removal of the unit must be carried out by

qualified personnel only.

WARNING: If installing the Switch in a stack with SuperStack 3 units that

are narrower than the Switch, the Switch unit must be installed below

the narrower units.

WARNING: The unit must be earthed (grounded).

WARNING: Connect the unit to an earthed power supply to ensure

compliance with safety standards.

WARNING: Power Cord Set:

This must be approved for the country where it is used:

U.S.A. and

Canada

■

The cord set must be UL-approved and CSA certified.

The minimum specification for the flexible cord is:

No. 18 AWG

Type SV or SJ

3-conductor

■

The cord set must have a rated current capacity of at least

10A.

The attachment plug must be an earth-grounding type

with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A,

250V) configuration.

United

Kingdom only

■

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

and be fitted with a 5A fuse which complies with BS1362.

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

be of type H03VVF3GO.75 (minimum).

Europe only:

■

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

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

be of type H03VVF3GO.75 (minimum).

Denmark

■

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

standard DK2-1a or DK2-5a.

Switzerland

The supply plug must comply with SEV/ASE 1011.

WARNING: The appliance coupler (the connector to the unit and not the

wall plug) must have a configuration for mating with an EN60320/IEC320

appliance inlet.

Download from Www.Somanuals.com. All Manuals Search And Download.

Important Safety Information

WARNING: The socket outlet must be near to the unit and easily

accessible. You can only remove power from the unit by disconnecting

the power cord from the outlet.

WARNING: This unit operates under SELV (Safety Extra Low Voltage)

conditions according to IEC 60950. The conditions are only maintained if

the equipment to which it is connected also operates under SELV

conditions.

WARNING: France and Peru only:

This unit cannot be powered from IT^†supplies. If your supplies are of IT

type, this unit must be powered by 230V (2P+T) via an isolation

transformer ratio 1:1, with the secondary connection point labelled

Neutral, connected directly to earth (ground).

^†Impédance à la terre.

WARNING: U.K. only:

If connecting a modem to the console port of the Switch, only use a

modem which is suitable for connection to the telecommunications

system.

WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They

cannot be used as standard traditional telephone sockets, or to connect

the unit to a traditional PBX or public telephone network. Only connect

RJ-45 data connectors, network telephony systems, or network

telephones to these sockets.

Either shielded or unshielded data cables with shielded or unshielded

jacks can be connected to these data sockets.

WARNING: The switch should only be used in a rack if it is mounted on

runners, a shelf, or a tray to support the weight. The rack mount kits

alone are not sufficient to support the weight of the switch. The rack

mount kits must not be used to suspend the switch from under a table or

desk, or attach it to a wall.

WARNING: If you are connecting the Switch to a Type 3 Power Module,

read the Safety Information section in the Type 3 Power Module User

Guide.

WARNING: When an Expansion Module is not installed ensure the

blanking panel is fited by tightening all screws with a suitable tool.

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A: SAFETY INFORMATION

WARNING: Fiber Optic ports - Optical Safety

Never look at the transmit laser while it is powered-up. Never look

directly at the fiber ports and fiber cable ends when they are

powered-up.

WARNING: Use of controls or adjustments of performance or procedures

other than those specified herein may result in hazardous laser emissions.

WARNING: The Switch must only be fitted with 3Com approved GBIC

transceivers, as listed below.

■

3CGBIC91 GBIC (SX)

3CGBIC92 GBIC (LX)

3CGBIC97 GBIC (LH70)

Download from Www.Somanuals.com. All Manuals Search And Download.

L’information de Sécurité Importante

AVERTISSEMENT: L'installation et la dépose de ce groupe doivent être

confiés à un personnel qualifié.

AVERTISSEMENT: Si vous entassez l'unité Switch avec les unités

SuperStack 3 Hub, l'unité Switch doit être installée en dessous des unités

Hub plus étroites.

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

groupe.

AVERTISSEMENT: Brancher l’unité à une source de courant mise à la

terre pour assurer la conformité aux normes de sécurité.

AVERTISSEMENT: Cordon électrique:

Il doit être agréé ans le pays d'utilisation:

Etats-Unis et

Canada

■

Le cordon doit avoir reçu l'homologation des UL et un

certificat de la CSA

■

Le cordon souple doit respecter, à titre minimum, les

spécifications suivantes :

■

calibre 18 AWG

type SV ou SJ

à 3 conducteurs

Le cordon doit être en mesure d'acheminer un courant

nominal d'au moins 10 A

■

La prise femelle de branchement doit être du type à mise à la

terre (mise à la masse) et respecter la configuration NEMA

5-15P (15 A, 125 V) ou NEMA 6-15P (15 A, 250 V)

Danemark

Europe

■

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

D1 de la norme DK2 1a ou DK2 5a

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

(“SCHKO”)

LE cordon secteur doit porter la mention <HAR> ou

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

Suisse

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

1011

AVERTISSEMENT: Le coupleur d'appareil (le connecteur du groupe et

non pas la prise murale) doit respecter une configuration qui permet un

branchement sur une entrée d'appareil EN60320/CEI 320.

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A: SAFETY INFORMATION

AVERTISSEMENT: La prise secteur doit se trouver à proximité de

l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil

hors circuit qu'en débranchant son cordon électrique au niveau de cette

prise.

AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement

basse de sécurité qui est conforme à la norme CEI 60950. Ces conditions

ne sont maintenues que si l'équipement auquel il est raccordé fonctionne

dans les mêmes conditions.

AVERTISSEMENT: France et Pérou uniquement:

Ce groupe ne peut pas être alimenté par un dispositif à impédance à la

terre. Si vos alimentations sont du type impédance à la terre, ce groupe

doit être alimenté par une tension de 230 V (2 P+T) par le biais d'un

transformateur d'isolement à rapport 1:1, avec un point secondaire de

connexion portant l'appellation Neutre et avec raccordement direct à la

terre (masse).

AVERTISSEMENT: Points d’accès RJ-45. Ceux-ci sont protégés par des

prises de données. Ils ne peuvent pas être utilisés comme prises de

téléphone conventionnelles standard, ni pour la connection de l’unité à

un réseau téléphonique central privé ou public. Raccorder seulement

connecteurs de données RJ-45, systèmes de réseaux de téléphonie ou

téléphones de réseaux à ces prises.

Il est possible de raccorder des câbles protégés ou non protégés avec des

jacks protégés ou non protégés à ces prises de données.

AVERTISSEMENT: Le commutateur doit être utilisé en rack uniquement

s’il est monté sur des rails à glissières, une étagère ou un plateau pour

supporter son poids. Les kits de montage en rack ne suffisent pas à eux

seuls pour supporter le poids du commutateur.

AVERTISSEMENTS: Si vous connectez le commutateur Switch à un

moduled'alimentation de Type 3, consultez les informations de sécurité

qui se trouvent dans le guide del'utilisateur du module d'alimentation de

type 3.

AVERTISSEMENTS: Si le module d’expansion nest pas installé, veillez à

bien installer la plaque d’obturation et serrez toutes les vis à l’aide d’un

outil approprié.

Download from Www.Somanuals.com. All Manuals Search And Download.

L’information de Sécurité Importante

AVERTISSEMENT: Ports pour fibres optiques – sécurité sur le plan

optique

Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais

directement le port à fibres optiques et les embouts de câbles à fibres

optiques tant qu'ils sont sous tension.

AVERTISSEMENT: L'utilisation de contrôles, de réglages de

performances ou de procédures autres que ceux qui sont spécifiés au sein

du présent document risquent d'entraîner l'exposition à des

rayonnements laser dangereux.

AVERTISSEMENT: Le commutateur ne doit être utilisé qu'avec des

modules Transceiver GBIC approuvés par 3Com.

■

3CGBIC91 GBIC (SX)

3CGBIC92 GBIC (LX)

3CGBIC97 GBIC (LH70)

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A: SAFETY INFORMATION

Wichtige Sicherheitsinformationen

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

Fachpersonal erfolgen.

VORSICHT: Wenn die Switch Einheit in einer Stapel mit anderen

SuperStack 3 Hub Einheiten eingebaut werden soll, muß die Switch

Einheit unter die schmaleren Hub Einheiten eingebaut werden.

VORSICHT: Das Gerät muß geerdet sein.

VORSICHT: Das Gerät muß an eine geerdete Steckdose angeschlossen

werden, die europäischen Sicherheitsnormen erfüllt.

VORSICHT: Der Anschlußkabelsatz muß mit den Bestimmungen des

Landes übereinstimmen, in dem er verwendet werden soll.

VORSICHT: Der Gerätestecker (der Anschluß an das Gerät, nicht der

Wandsteckdosenstecker) muß eine passende Konfiguration für einen

Geräteeingang gemäß EN60320/IEC320 haben.

VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht

zugänglich sein. Die Stromversorgung des Geräts kann nur durch

Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen

werden.

VORSICHT: Europe

■

Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)

sein und die Aufschrift <HAR> oder <BASEC> tragen.

Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”).

VORSICHT: Der Betrieb dieses Geräts erfolgt unter den

SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 60950. Diese

Bedingungen sind nur gegeben, wenn auch die an das Gerät

angeschlossenen Geräte unter SELV-Bedingungen betrieben werden.

Download from Www.Somanuals.com. All Manuals Search And Download.

Wichtige Sicherheitsinformationen

VORSICHT: RJ-45-Porte. Diese Porte sind geschützte Datensteckdosen.

Sie dürfen weder wie normale traditionelle Telefonsteckdosen noch für

die Verbindung der Einheit mit einem traditionellem privatem oder

öffentlichem Telefonnetzwerk gebraucht werden. Nur

RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone an diese

Steckdosen anschließen.

Entweder geschützte oder ungeschützte Buchsen dürfen an diese

Datensteckdosen angeschlossen werden.

VORSICHT: Der Switch darf nur dann in einem Einschub montiert

werden, wenn dieser zur Tragkraftverstärkung auf einer Laufschiene, in

einem Regal oder einem Träger montiert ist. Der Einschubmontagesatz

alleine reicht nicht aus, um das Gewicht des Switch zu tragen.

VORSICHT: Ist kein Erweiterungsmodul installiert, überprüfen Sie bitte

den Sitz der Stanzplatte, indem Sie alle Schrauben mit einem geeigneten

Werkzeug anziehen.

VORSICHT: Bevor Sie den Schalter an das Stromversorgungsmodul Typ 3

anschließen, lesen Sie bitte die Sicherheitshinweise in der

Bedienungsanleitung für das Stromversorgungsmodul Typ 3.

VORSICHT: Faseroptikanschlüsse – Optische Sicherheit

Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet

ist. Niemals direkt auf die Faseransnchlüsse und auf die Faserkabelenden

schauen, während diese eingeschaltet sind.

VORSICHT: Die Verwendung von Steuerelementen oder die Anpassung

von Leistungen und Verfahren in anderer als der hierin genannten Weise

kann zu gefährlichen Laseremissionen führen.

VORSICHT: Der Switch sollte nur mit von der Firma 3Com zugelassenen

GBIC Tranceivermodulen, wie unten augefuehrt, bestueckt werden.

■

3CGBIC91 GBIC (SX)

3CGBIC92 GBIC (LX)

3CGBIC97 GBIC (LH70)

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX A: SAFETY INFORMATION

Download from Www.Somanuals.com. All Manuals Search And Download.

PIN-OUTS

Null Modem Cable

9-pin to RS-232 25-pin

PC-AT Serial Cable

9-pin to 9-pin

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX B: PIN-OUTS

Modem Cable

9-pin to RS-232 25-pin

RJ-45 Pin

Assignments

Pin assignments are identical for 10/100BASE-T and 1000BASE-T RJ-45

connectors.

Table 10 Pin assignments

Pin Number

10/100BASE-T

1000BASE-T

Ports configured as MDI

Transmit Data +

Transmit Data -

Receive Data +

Not assigned

Receive Data –

Not assigned

Bidirectional Data A+

Bidirectional Data A-

Bidirectional Data B+

Bidirectional Data C+

Bidirectional Data C-

Bidirectional Data B-

Bidirectional Data D+

Bidirectional Data D-

Download from Www.Somanuals.com. All Manuals Search And Download.

RJ-45 Pin Assignments

Table 11 Pin assignments

Pin Number

10/100BASE-T

1000BASE-T

Ports configured as MDIX

Receive Data +

Receive Data -

Transmit Data +

Not assigned

Transmit Data -

Not assigned

Bidirectional Data B+

Bidirectional Data B-

Bidirectional Data A+

Bidirectional Data D+

Bidirectional Data D-

Bidirectional Data A-

Bidirectional Data C+

Bidirectional Data C-

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX B: PIN-OUTS

Download from Www.Somanuals.com. All Manuals Search And Download.

TECHNICAL SPECIFICATIONS

The technical specifications for the Switches in the Switch 4900 Series are

the same unless otherwise stated.

Physical Dimensions

Switch 4900: Switch Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x

Depth: 363.4 mm (14.30 in.) (not including bulge). Weight: 6.3 Kg (13.88 lbs)

Switch 4900 SX: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x

Depth: 363.4 mm (14.30 in.) (not including bulge). Weight: 6.0 Kg (13.22 lbs)

Switch 4924: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x Depth:

413 mm (16.27 in.) (not including bulge). Weight: 6.4 Kg (14.10 lbs)

Switch 4950: Height: 65.8 mm (2.59 in.) x Width: 440 mm (17.3 in.) x Depth:

413 mm (16.27 in.) (not including bulge). Weight: 6.91 Kg (15.23 lbs)

Environmental Requirements

Operating Temperature

Storage Temperature

Operating Humidity

Standards

0 ° to 40 °C (32 ° to 104 °F)

–10 ° to +70 °C (14 ° to 158 °F)

10–95% relative humidity, non-condensing

EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32.

Operational testing: paras 2.1, 2.2, 2.30 and 2.13).

Safety

Agency Certifications

UL 1950 / UL60950, EN60950, CSA 22.2 No. 950 / CSA 22.2 No. 60950,

IEC 60950, IEC 825-1 (4900 SX and 4950 only), EN 60825-1 (4900 SX and 4950

only)

EMC

Emissions

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

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

EN61000-3-2

Immunity

EN 55024

Power Consumption

Switch 4900: 308 watts maximum

Switch 4900 SX: 162 watts maximum

Switch 4924: 254 watts maximum

Switch 4950: 200 watts maximum

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX C: TECHNICAL SPECIFICATIONS

Heat Dissipation

Switch 4900:1050 BTU/hour maximum

Switch 4900 SX: 560 BTU/hour maximum

Switch 4924: 870 BTU/hour maximum

Switch 4950: 685 BTU/hour maximum

Power Supply

AC Line Frequency

Input Voltage Options

Current Rating

50/60 Hz

90–240 VAC

Switch 4900: 4 A (amps) (maximum)

Switch 4900 SX: 3 A (amps) (maximum)

Switch 4924 and 4950: 4.5 A (amps) (maximum)

Standards Supported

SNMP:

Terminal Emulation:

SNMP protocol (RFC 1157)

MIB-II (RFC 1213)

Telnet (RFC 854)

Protocols Used for Administration:

UDP (RFC 768)

Bridge MIB (RFC 1493)

RMON MIB II (RFC 2021)

Remote Monitoring MIB (RFC 1757)

MAU MIB (RFC 2239)

IP (RFC 791)

ICMP (RFC 792)

TCP (RFC 793)

ARP (RFC 826)

TFTP (RFC 783)

DHCP (RFC 2131, RFC 2132, RFC 1534)

BOOTP (RFC 951, RFC 1497)

IGMP (RFC 1112 & 2236)

RADIUS (RFC 2865, 1321, & 2869)

RMON: (RFC 2819)

Download from Www.Somanuals.com. All Manuals Search And Download.

TECHNICAL SUPPORT

3Com provides easy access to technical support information through a

variety of services. This appendix describes these services.

Information contained in this appendix is correct at time of publication. For

the most recent information, 3Com recommends that you access the

3Com Corporation World Wide Web site.

Online Technical

Services

3Com offers worldwide product support 24 hours a day, 7 days a week,

through the following online systems:

■

World Wide Web site

3Com Knowledgebase Web Services

3Com FTP site

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

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

http://www.3com.com/

This service provides access to online support information such as technical

documentation and software, as well as support options that range from

technical education to maintenance and professional services.

3Com The 3Com Knowledgebase is a database of technical information to help

Knowledgebase Web you install, upgrade, configure, or support 3Com products. The

Services Knowledgebase is updated daily with technical information discovered by

3Com technical support engineers. This complimentary service, which is

available 24 hours a day, 7 days a week to 3Com customers and partners,

is located on the 3Com Corporation World Wide Web site at:

http://knowledgebase.3com.com

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX D: TECHNICAL SUPPORT

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

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

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

your FTP client:

■

Hostname: ftp.3com.com

Username: anonymous

Password: <your Internet e-mail address>

You do not need a user name and password with Web browser software

such as Netscape Navigator and Internet Explorer.

Support from Your

Network Supplier

If you require additional assistance, contact your network supplier. Many

suppliers are authorized 3Com service partners who are qualified to

provide a variety of services, including network planning, installation,

hardware maintenance, application training, and support services.

When you contact your network supplier for assistance, have the

following information ready:

■

Product model name, part number, and serial number

A list of system hardware and software, including revision levels

Diagnostic error messages

Details about recent configuration changes, if applicable

If you are unable to contact your network supplier, see the following

section on how to contact 3Com.

Download from Www.Somanuals.com. All Manuals Search And Download.

Support from 3Com

Support from 3Com If you are unable to obtain assistance from the 3Com online technical

resources or from your network supplier, 3Com offers email and

telephone technical support services. To find out more about your

support options, email or call the 3Com technical support services at the

location nearest you.

Email Support Some 3Com regions offer an email support service. To access this service

for your region, use the appropriate URL or email address from the list

below.

Asia, Pacific Rim

From this region, email:

[email protected]

Europe, Middle East and Africa

From this region, enter the URL:

http://emea.3com.com/support/email.html

Latin America

Spanish speakers, enter the URL:

http://lat.3com.com/lat/support/form.html

Portuguese speakers, enter the URL:

http://lat.3com.com/br/support/form.html

English speakers, email:

[email protected]

Telephone Support When you contact 3Com for assistance, have the following information

ready:

■

Product model name, part number, and serial number

A list of system hardware and software, including revision levels

Diagnostic error messages

Details about recent configuration changes, if applicable

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX D: TECHNICAL SUPPORT

Here is a list of worldwide technical telephone support numbers. These

numbers are correct at the time of publication. Refer to the 3Com Web

site for updated information.

Country

Telephone Number

Country

Telephone Number

Asia, Pacific Rim

Australia

Hong Kong

India

1 800 678 515

800 933 486

Philippines

1235 61 266 2602 or

+61 2 9937 5076

10800 61 00137 or

021 6350 1590 or

00800 0638 3266

800 6161 463

+61 2 9424 5179 or

000800 650 1111

001 803 61009

00531 616 439 or

03 5977 7991

P.R. of China

Indonesia

Japan

Singapore

S. Korea

00798 611 2230 or

02 3455 6455

Malaysia

1800 801 777

New Zealand

Pakistan

0800 446 398

+61 2 9937 5083

Taiwan

Thailand

00801 611 261

001 800 611 2000

Europe, Middle East and Africa

From anywhere in these

regions, call:

+44 (0)1442 435529

From the following countries, you may use the numbers shown:

Austria

01 7956 7124

070 700 000

070 700 770

7010 7289

01080 2783

0825 809 622

01805 404 747

06800 14466

1800 509359

1800 943 2632

199 161346

Luxembourg

Netherlands

Norway

800 29880

0900 777 7737

815 33 047

00800 441 1357

707 200 123

0800 991196

9 021 60455

07711 14453

08488 50112

0870 241 3901

Belgium (Flemish)

Belgium (French)

Denmark

Finland

Poland

Portugal

South Africa

Spain

Sweden

Switzerland

U.K.

France

Germany

Hungary

Ireland

Israel

Italy

Latin America

Antigua

Argentina

Aruba

Bahamas

Barbados

Belize

Bermuda

Bonaire

Brazil

Cayman

Chile

Colombia

Costa Rica

Curacao

Ecuador

Dominican Republic

1 800 988 2112

0 810 444 3COM

1 800 998 2112

52 5 201 0010

1 800 998 2112

0800 13 3COM

Guatemala

Haiti

Honduras

Jamiaca

Martinique

Mexico

Nicaragua

Panama

Paraguay

Peru

Puerto Rico

Salvador

Trinidad and Tobago

Uruguay

Venezuela

Virgin Islands

AT&T +800 998 2112

57 1 657 0888

AT&T +800 998 2112

1 800 998 2112

571 657 0888

01 800 849CARE

AT&T +800 998 2112

54 11 4894 1888

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

57 1 657 0888

1 800 998 2112

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

North America

1 800 876 3266

Download from Www.Somanuals.com. All Manuals Search And Download.

Returning Products for Repair

Returning Products

for Repair

Before you send a product directly to 3Com for repair, you must first

obtain an authorization number. Products sent to 3Com without

authorization numbers will be returned to the sender unopened, at the

sender’s expense.

You can obtain an authorization number (called an RMA) by entering the

following URL into your Internet browser:

http://www.3com.com/support/en_US/repair

Alternatively, you can obtain an RMA by calling or faxing one of the

following numbers:

Country

Telephone Number

Country

Telephone Number

Asia, Pacific Rim

From anywhere in this

region call:

+ 65 543 6500 phone

+ 65 543 6348 fax

Europe, Middle East and Africa

From anywhere in these

regions, call:

+44 (0)1442 435529

From the following countries, you may use the numbers shown:

Austria

01 7956 7124

070 700 000

070 700 770

7010 7289

01080 2783

0825 809 622

01805 404 747

06800 14466

1800 509359

1800 943 2632

199 161346

Luxembourg

Netherlands

Norway

800 29880

0900 777 7737

815 33 047

00800 441 1357

707 200 123

0800 991196

9 021 60455

07711 14453

08488 50112

0870 241 3901

Belgium (Flemish)

Belgium (French)

Denmark

Finland

Poland

Portugal

South Africa

Spain

Sweden

Switzerland

U.K.

France

Germany

Hungary

Ireland

Israel

Italy

Download from Www.Somanuals.com. All Manuals Search And Download.

APPENDIX D: TECHNICAL SUPPORT

Country

Telephone Number

Country

Telephone Number

Latin America

Antigua

Argentina

Aruba

Bahamas

Barbados

Belize

Bermuda

Bonaire

Brazil

Cayman

Chile

Colombia

Costa Rica

Curacao

Ecuador

Dominican Republic

1 800 988 2112

0 810 444 3COM

1 800 998 2112

52 5 201 0010

1 800 998 2112

0800 13 3COM

Guatemala

Haiti

Honduras

Jamiaca

Martinique

Mexico

Nicaragua

Panama

Paraguay

Peru

Puerto Rico

Salvador

Trinidad and Tobago

Uruguay

Venezuela

Virgin Islands

AT&T +800 998 2112

57 1 657 0888

AT&T +800 998 2112

1 800 998 2112

571 657 0888

01 800 849CARE

AT&T +800 998 2112

54 11 4894 1888

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

57 1 657 0888

1 800 998 2112

AT&T +800 998 2112

1 800 998 2112

AT&T +800 998 2112

North America

From U.S.A and Canada call:

1 800 876 3266 phone

1 508 323 6061 fax (not toll free)

Download from Www.Somanuals.com. All Manuals Search And Download.

INDEX

GBIC

Numbers

3C number 19

ports 16

3Com Knowledgebase Web Services 75

3Com URL 75

hardware features 13

access levels of default users 51

approved GBIC transceivers 29

automatic setup 43

3Com Network Supervisor 43

console port 44

installing the Switch 21

prerequisites 23

interconnect cable 25

IP addressing

cable

registered 58

IP configuration 35

10/100/1000BASE-T 27

fiber 28

pin-outs 69

LEDs 17

CD-ROM 9

logging in as a default user 51

command line interface

management 46

conventions

notice icons, About This Guide 8

text, About This Guide 8

cross-over configuration 27

MAC address of the Switch 19

management

methods 46

preparing for 36

setting up 33, 34

manual setup

default

console port 40

front panel port 37

MDI configuration 27

MDIX configuration 27

MIBs 76

settings 20

users 51

Ethernet address of the Switch 19

network supplier support 76

factory defaults 20

online technical services 75

Download from Www.Somanuals.com. All Manuals Search And Download.

powering-up 26

product name 19

rack mounting 23

RPS socket 19

serial number 19

size 73

unit information label 19

pin assignments

RJ-45 70

serial cable 69

pin-outs 69

ports

10/100/1000BASE-T 16

1000BASE-SX 16

GBIC 16

XRN Distributed Fabric 24

system specifications 73

power socket 19

powering-up a Switch 26

problem solving 53

communication problems 57

hardware problems 55

IP addressing 55

LEDs 54

technical support

3Com Knowledgebase Web Services 75

3Com URL 75

network suppliers 76

product repair 79

troubleshooting 53

product name 19

rack mounting a Switch 23

Redundant Power System. See RPS

returning products for repair 79

RPS 19

unit information label 19

URL 75

socket 19

web interface management 47

setting up 49

World Wide Web (WWW) 75

serial number of the Switch 19

Simple Network Management Protocol. See SNMP

SNMP 51

XRN Interconnect Module Kit 25

SNMP management 47

setting up 51

socket

power 19

RPS 19

specifications, system 73

straight-through configuration 27

Switch

3C number 19

automatic setup 43

dimensions 73

Ethernet address 19

features 13

Download from Www.Somanuals.com. All Manuals Search And Download.

REGULATORY NOTICES

FCC STATEMENT

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to

part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful

interference when the equipment is operated in a commercial environment. This equipment generates, uses

and can radiate radio frequency energy and, if not installed and used in accordance with the instructions,

may cause harmful interference to radio communications. Operation of this equipment in a residential area is

likely to cause harmful interference to radio communications, in which case the user will be required to

correct the interference at their own expense.

INFORMATION TO THE USER

If this equipment does cause interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of

the following measures:

■

Reorient the receiving antenna.

Relocate the equipment with respect to the receiver.

Move the equipment away from the receiver.

Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced radio/television technician for additional

suggestions. The user may find the following booklet prepared by the Federal Communications Commission

helpful:

How to Identify and Resolve Radio-TV Interference Problems

This booklet is available from the U.S. Government Printing Office, Washington, DC 20402, Stock No.

004-000-00345-4.

In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE

802.3.

CSA STATEMENT

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

Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur

du Canada.

CE STATEMENTS (EUROPE)

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

amended by European Directive 93/68/EEC.

Warning: This is a class A product. In a domestic environment this product may cause radio interference in

which case the user may be required to take adequate measures.

You must only insert a 3Com approved GBIC transceiver into the Switch. These are listed in the “Approved

GBIC Transceivers” section of the Getting Started Guide.

VCCI STATEMENT

BSMI STATEMENT

Download from Www.Somanuals.com. All Manuals Search And Download.

Acer Personal Computer 5600 series User Manual
Acesonic Karaoke Machine DKR 510 User Manual
Acu Rite Weather Radio 75075 75075W 75075W1 User Manual
Addonics Technologies Network Card ADSA4R E User Manual
Aiwa Stereo System XR M1000 User Manual
Allied Telesis Switch X3112 User Manual
Alpine Car Stereo System CDE 110 User Manual
Amana Clothes Dryer 40086001 User Manual
Ask Proxima Projector AV 9300 User Manual
Atlas Sound TV Receiver VT VTF 154U User Manual