3COM Link 1000 User Manual

SuperStack® II Switch 1000

User Guide

Agent Software Version 3.1

http://www.3com.com/

Document No. DUA1690-0AAA05 Published June 1997

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145

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

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3Com Ireland, 1997

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

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Other brand and product names may be registered trademarks or trademarks of their respective holders.

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ONTENTS

BOUT THIS GUIDE

Introduction 1 How to Use This Guide 1 Conventions 2 Related Documentation 2

ETTING STARTED

About the Switch 1000 1-1

Summary of Features 1-1 Port Connections 1-2

10BASE-T Ports 1-2 100BASE-TX Port 1-2 Plug-in Module 1-2 Transceiver Module 1-2 Backbone Port 1-2

Switch Operation and Features 1-3

How Does the Switch Compare to a Bridge? 1-3 Forwarding of Packets 1-3 Intelligent Flow Management 1-4 Full Duplex 1-4 Security 1-5 Resilient Links 1-5 Virtual LANs 1-5 Spanning Tree Protocol 1-5 PACE 1-6

Switch 1000 on Your Network 1-6

Server Connections 1-6 Network Configuration Examples 1-6 Network Segmentation I 1-7 Network Segmentation II 1-8 Desktop Switching 1-9

Unit Overview — Front 1-10

10BASE-T Ports 1-11 100BASE-TX Port 1-11 LEDs 1-11

Unit Overview — Rear 1-12

Power Socket 1-13 Unit Serial Number 1-13 Redundant Power System Socket 1-13 Reset Button 1-13 Console Port 1-13 Plug-in Module Slot 1-13 Transceiver Module Slot 1-13

Ethernet Address 1-13 Unit Defaults 1-14 Managing the Switch 1000 1-14 Quick Start For SNMP Users 1-15

Entering an IP Address for the Switch 1-15

NSTALLATION AND SETUP

Following Safety Information 2-1 Positioning the Switch 1000 2-1

Configuration Rules for Fast Ethernet 2-2 Configuration Rules with Full Duplex 2-2 Installing the Switch 1000 2-4

Rack Mounting 2-4 Stacking the Switch and Other Units 2-4

Wall Mounting 2-5 Powering-up the Switch 2-6 Connecting a Redundant Power System (RPS) 2-6 Connecting Equipment to the Console Port 2-7

Connecting a VT100 Terminal 2-7

Connecting a VT100 Terminal Emulator 2-7

Connecting a Workstation Running SLIP 2-8

ETTING UP FOR MANAGEMENT

Methods of Managing the Switch 1000 3-1

Using the VT100 Management Interface 3-1

Using Telnet 3-2 Managing Over The Network 3-2

IP Addresses 3-2

Obtaining a Registered IP Address 3-3

Navigating the VT100 Screens 3-4

Screen Conventions 3-4

Keyboard Shortcuts 3-5

Correcting Text Entry 3-5 Setting Up the Switch for Management 3-6

Logging On 3-7

After Logging On 3-8 Switch Management Setup 3-9 Logging Off 3-12 Auto Logout 3-12

ANAGING THE SWITCH

Setting Up Users 4-2 Creating a New User 4-3 Deleting a User 4-4 Editing User Details 4-5 Assigning Local Security 4-6 Choosing a Switch Management Level 4-7 Setting Up the Switch Unit 4-9 Setting Up the Switch Ports 4-12 Setting Up the Switch Database (SDB) 4-16

The Database View 4-17 Searching the Switch Database 4-18

By MAC Address 4-18

By Port 4-18 Adding an Entry into the SDB 4-18 Deleting an Entry from the SDB 4-18 Specifying that an Entry is Permanent 4-18

Setting Up Resilient Links 4-19

Configuring Resilient Links 4-20 Creating a Resilient Link Pair 4-21 Deleting a Resilient Link 4-21 Viewing the Resilient Setup 4-22

Setting Up Traps 4-24 Setting Up the Console Port 4-25 Resetting the Switch 4-27 Initializing the Switch 4-28 Upgrading Software 4-29

DVANCED MANAGEMENT

Virtual LANs (VLANs) 5-1

What are VLANs? 5-1 Benefits of VLANs 5-1

1000

How VLANs Ease Change and Movement 5-2 How VLANs Control Broadcast Traffic 5-2

How VLANs Provide Extra Security 5-2 An Example 5-2 VLANs and the Switch 5-3

The Default VLAN and Moving Ports From the Default

VLAN 5-3 Connecting VLANs to a Router 5-3 Connecting Common VLANs Between Switch Units

5-3 Using AutoSelect VLAN Mode 5-3 Using Non-routable Protocols 5-5 Using Unique MAC Addresses 5-5 Extending VLANs into an ATM Network 5-5

VLAN Configurations 5-5

Example 1 5-5 Example 2 5-6 Example 3 5-7

Setting Up VLANs on the Switch 5-8

Assigning a Port to a VLAN When Using Port VLAN

Mode 5-10 Specifying a Backbone Port 5-10 Specifying that a Port is a VLT Port 5-10

Setting Up VLANs Using AutoSelect VLAN Mode 5-11

Specifying Information About the VLAN Server 5-11 Specifying AutoSelect VLAN Mode 5-11

Spanning Tree Protocol 5-12

What is STP? 5-12 How STP Works 5-14

STP Initialization 5-14 STP Stabilization 5-14 STP Reconfiguration 5-14 An Example 5-15

STP Configurations 5-16

Enabling STP on the Switch 5-17 Configuring STP on the Switch 5-18

Configuring the STP Parameters of VLANs 5-18 Configuring the STP Parameters of Ports 5-20

RMON 5-22

What is RMON? 5-22 About the RMON Groups 5-23

Statistics 5-23 History 5-23 Alarms 5-23 Hosts 5-23 Hosts Top N 5-23 Matrix 5-24 Filter 5-24 Capture 5-24 Events 5-24

Benefits of RMON 5-25

How RMON Improves Your Efficiency 5-25 How RMON Allows Proactive Management 5-25

How RMON Reduces the Traffic Load 5-25 RMON and the Switch 5-26 RMON Features of the Switch 5-26 About Alarm Actions 5-28 About Default Alarm Settings 5-29 About the Audit Log 5-29

TATUS MONITORING AND STATISTICS

Summary Statistics 6-2 Port Statistics 6-3 Port Traffic Statistics 6-4 Port Error Analysis 6-6 Status Monitoring 6-8

Fault Log 6-9 Remote Polling 6-10

Modem Cable D-2 RJ45 Pin Assignments D-2

AFETY INFORMATION

Important Safety Information A-1

Power Supply and Fuse A-3 Sockets for Redundant Power System (RPS) A-3 RJ45 Ports A-3 Fiber Ports A-3

L’information de Sécurité Importante A-4

La Source de Courant et Le Fusible A-5 Socle Pour Alimentation Multiple A-5 Les Ports RJ45 A-6 Les Ports Fibre A-6

Wichtige Sicherheitsinformationen A-7

Stromversorgung und Sicherung A-8 Steckdose für Redundant Power System (RPS) A-8 RJ45 Anschlußen A-8 Glasfaser Anschlußen A-8

CREEN ACCESS RIGHTS

ROUBLE-SHOOTING

LEDs C-1 Using the VT100 Interface C-2 Using the Switch C-3

WITCH

ECHNICAL SUPPORT

Online Technical Services F-1

Support from Your Network Supplier F-3 Support from 3Com F-3 Returning Products for Repair F-4

NDEX

3COM C

1000 T

World Wide Web Site F-1 3Com Bulletin Board Service F-1

Access by Analog Modem F-1

Access by Digital Modem F-2 3ComFacts Automated Fax Service F-2 3ComForum on CompuServe Online Service F-2

LOSSARY

ORPORATION LIMITED WARRANTY

LECTRO-MAGNETIC COMPATIBILITY

ECHNICAL SPECIFICATIONS

OUTS

PIN-

Null Modem Cable D-1 PC-AT Serial Cable D-1

BOUT

About This Guide provides an overview of this guide, describes the guide conventions, tells you where to look for specific information and lists other publications that may be useful.

Introduction

This guide provides the information you need to install and configure the SuperStack 24 Port (3C16900A) and the SuperStack II Switch 1000 12 Port (3C16901A) with v3.1 agent software. The functionality of both units is identical, although the local management screens reflect the different number of ports. Where appropriate, these differences are noted.

The guide is intended for use by network administrators who are responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of Local Area Networks.

If the information in the Release Notes shipped with your product differs from the information in this guide, follow the Release Notes.

Throughout this guide, the SuperStack II Switch 1000 is referred to as the Switch 1000 or Switch.

HIS

UIDE

II Switch 1000

How to Use This Guide

This table shows where to find specific information in this guide.

If you are looking for... Turn to...

An overview of the Switch 1000 Chapter 1 Information about installing the Switch 1000 into

your network Information about the methods you can use to man-

age the Switch 1000 Information about managing the Switch 1000 Chapter 4 Information about more advanced management fea-

tures; for example VLANs, Spanning Tree and RMON Information about monitoring the status of the

Switch 1000 Safety information Appendix A Information about the access rights for each VT100

screen Trouble-shooting information Appendix C Information about the pin-outs relating to the Switch

1000 Information about the Technical Specifications of the

Switch 1000 Information about the Technical Support available

from 3Com

Chapter 2

Chapter 3

Chapter 5

Chapter 6

Appendix B

Appendix D

Appendix E

Appendix F

2 A

BOUT THIS GUIDE

Conventions

Tab le 1 and Tab le 2 list conventions that are used

throughout this guide.

Table 1

Convention Description

Screen displays

The words “enter” and “type”

[Key] names Key names appear in text in one of two ways:

Menu commands

and

Words in type

Words in

bold-face

Text Conventions

buttons

italicized

type

This typeface represents information as it appears on the screen

When you see the word “enter” in this guide, you must type something, and then press the Return or Enter key. Do not press the Return or Enter key when an instruction simply says “type.”

Referred to by their labels, such as “the

■

Return key” or “the Escape key” Written with brackets, such as [Return] or

■

[Esc].

If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example:

Press [Ctrl]+[Alt]+[Del].

Menu commands or button names appear in italics. Example:

From the

Italics emphasize a point or denote new terms at the place where they are defined in the text.

Bold text denotes key features.

Help

menu, select

Contents

Table 2

Icon Notice Type Alerts you to...

Notice Icons

Information note

Caution Risk of personal injury, system damage,

Warning Risk of severe personal injury

Important features or instructions

or loss of data

About the Switch 1000

Part of 3Com’s SuperStack® II range of products, the Switch 1000 is designed to overcome the common problem of insufficient bandwidth for today’s growing network applications, while providing low-cost, high performance networking with little need for configuration. Use the Switch 1000 to provide your users with greater bandwidth, faster throughput and high speed links.

The SuperStack II Switch 1000 is a revision of the LinkSwitch 1000.

Summary of Features

The Switch 1000 has the following features:

12 or 24 Ethernet 10BASE-T ports

■

Fast Ethernet 100BASE-TX port

■

Plug-in Module slot (Asynchronous Transfer

■

Mode (ATM) and Fast Ethernet) Transceiver Module slot (10Mbps Ethernet)

■

Support for up to 500 endstations, unlimited sta-

■

tions on backbone port Four forwarding modes for packets

■

TARTED

Full duplex on all fixed Ethernet and Fast Ethernet

■

ports, and Fast Ethernet Plug-in Module ports Security

■

Resilient Links

■

Support for 16 Virtual LANs (VLANs)

■

Spanning Tree Protocol (STP) per VLAN

■

PACE (Priority Access Control Enabled) for sup-

■

porting multimedia applications over Ethernet 3Com’s SuperStack II architecture:

■

Connects to Redundant Power System

■

Integrated network management

■

19-inch rack or stand-alone mounting

■

SmartAgent support:

■

IP and IPX management over SNMP

■

RMON

■

Repeater and Bridge MIB

■

Broadcast storm control

■

Easy software upgrades

■

BOOTP for automatic IP address configuration

■

Local management

■

Intelligent Flow Management for congestion

■

control

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Port Connections

10BASE-T Ports

The Switch has 12 or 24 10BASE-T ports configured as MDIX (cross-over), which provide a full 10Mbps bandwidth to attached endstations. Maximum segment length is 100m (328ft) over grade 3, 4, or 5 twisted pair cable.

As these ports are configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 10BASE-T ports in 3Com devices are MDIX-only.

100BASE-TX Port

The Switch has a single Fast Ethernet 100BASE-TX port configured as MDIX (cross-over), which provides a 100Mbps connection to, for example, a local server. The maximum segment length is 100m (328ft) over grade 5 twisted pair cable.

As this port is configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 100BASE-TX ports in 3Com devices are MDIX-only.

Transceiver Module

A slot at the rear of the unit allows you to install any of the 3Com 10Mbps Ethernet Transceiver Modules. When a Transceiver Module is fitted, port 1 automatically switches to become the Transceiver Module port. The Transceiver Module can provide a 10Mbps link to the rest of your network.

Backbone Port

The Switch allows you to specify any port to be a

backbone port

■

Frames with unknown addresses received by the

with the following attributes:

Switch are forwarded to the port.

■

Addresses received on the port are not stored in the Switch Database (the database which contains the device addresses received by the Switch).

A backbone port is typically used to connect the Switch to the backbone of large networks (over 500 MAC addresses). For information about how to specify a backbone port for a new or initialized Switch, refer to “

page 4-9

Setting Up the Switch Unit” on

Plug-in Module

A slot at the rear of the unit can take a Plug-in Module, providing an additional high-speed port. This could be used, for example, to provide a Fast Ethernet or Asynchronous Transfer Mode (ATM) backbone connection to the rest of your network.

You can specify one backbone port for each VLAN defined on the Switch. For more information about how to specify a backbone port for a VLAN, refer to

Setting Up VLANs on the Switch” on page 5-8.

“

About the Switch 1000 1-3

Switch Operation and Features

How Does the Switch Compare to a Bridge?

The table below shows how Switch 1000 operation compares to that of a conventional IEEE 802.1d bridge.

IEEE 802.1d Bridge Switch 1000

Address Learning

Forwarding Mode

Operation when packet buffers full

Spanning Tree Action on

Unknown Destination Address

Database size

All ports All ports except back-

Store and forward Fast Forward, Frag-

Discard packets Invoke Intelligent

Supported Optional

Flood all ports Forward to backbone

4000 addresses 500 addresses

bone port

ment Free, Store and forward, or Intelligent

Flow Management to suppress transmissions at source

port, or forward to all ports

Forwarding of Packets

The table below shows how a packet is processed when it arrives at the Switch 1000.

Packet Source Destination

Any port EXCEPT backbone (Unicast packet)

Any port EXCEPT backbone (Multi/Broadcast packet)

Backbone port (Unicast packet)

Backbone port (Multi/Broadcast packet)

Address

Unknown Forward to back-

Same port as source address

Another port (not backbone)

Not applicable Forward to all ports

Unknown Filter

Known port (not backbone)

Not applicable Forward to all ports

Action

bone port only, or forward to all ports

Filter

Forward to specific port only

(including backbone) in the same VLAN as source port

Forward to known port only

within specific VLAN

In all other ways, Switch 1000 and bridge operation is identical.

You can configure the Switch to forward packets with an unknown destination address to all ports in the same VLAN as the source port. Refer to “

Setting Up the Switch Unit” on page 4-9 for more informa-

tion.

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To best suit your networking requirements, the Switch 1000 allows you to select one of four frame forwarding modes:

■

Fast Forward

— Frames are forwarded as soon as the destination address is received and verified. The forwarding delay, or latency, for all frames in this mode is just 40µs, but with the lack of checking time any error frames received are propagated through the switch.

■

Fragment Free

— A minimum of 64 bytes of the received frame is buffered prior to the frame being forwarded. This ensures that collision fragments are not propagated through the network. The forwarding delay, or latency, for all frames in this mode is 64µs.

■

Store and Forward

— Received packets are buffered in their entirety prior to forwarding. This ensures that only good frames are passed to their destination. The forwarding delay for this mode varies between 64µs and 1.2ms, depending on frame length. In Store and Forward mode, latency is measured as the time between receiving the last bit of the frame and transmitting the first bit. For the Switch 1000, this is 8µs.

■

Intelligent

— The Switch monitors the amount of error traffic on the network and changes the forwarding mode accordingly. If the Switch detects less than 18 errors a second, it operates in Fast Forward mode. If the Switch detects 18 or more errors a second, it operates in Store and Forward mode until the number of errors a second returns to zero.

For more information about selecting forwarding modes, refer to “

page 4-9

Setting Up the Switch Unit” on

Intelligent Flow Management

Intelligent Flow Management (IFM) is a system for controlling congestion on your network. Congestion can be caused by one or more devices sending traffic to an already busy port on the Switch 1000. If a port on the Switch 1000 is connected to another switch or endstation, IFM prevents packet loss and inhibits the device from generating more packets until the period of congestion ends.

IFM should be enabled on a port if it is connected to another switch, or an endstation. IFM should be disabled on a port connected to a repeater.

For more information about enabling IFM, refer to

Setting Up the Switch Ports” on page 4-12.

“

Full Duplex

The Switch 1000 provides full duplex support for all its fixed ports, and Fast Ethernet Plug-in Module ports. Full duplex allows frames to be transmitted and received simultaneously and, in effect, doubles the potential throughput of a link. In addition, full duplex also supports 100BASE-FX cable runs of up to 2km (6562ft).

Full duplex can be enabled on all the relevant ports, all the Fast Ethernet ports, or on individual ports. It is not supported by the Transceiver Module.

About the Switch 1000 1-5

For more information about enabling full duplex, refer to “

Setting Up the Switch Unit” and “Setting

Up the Switch Ports” in Chapter 4.

Security

The Switch 1000 contains advanced security features which guard against users connecting unauthorized endstations to your network. When security is enabled on a port, it enters single address learning mode. In this mode, the port learns a single Ethernet address; once this is learned, the port is disabled if a different address is seen on the port. Until security is disabled, no other address can be learned.

For more information about security, refer to “

Set-

ting Up the Switch Ports” on page 4-12.

Resilient Links

The Resilient Link feature in the Switch 1000 enables you to protect critical links and prevent network downtime should those links fail.

Setting up resilience ensures that should a main communication link fail, a standby duplicate link immediately and automatically takes over the task of the main link. Each main and standby link pair is referred to as a resilient link pair.

For more information about resilient links, refer to

Setting Up Resilient Links” on page 4-19.

“

Virtual LANs

The Switch 1000 has a Virtual LAN (VLAN) feature which allows you to build your network segments without being restricted by physical connections. A VLAN is defined as a group of location- and topology-independent devices that communicate as if they are on the same physical LAN. Implementing VLANs on your network has three main advantages:

It eases the change and movement of devices on

■

IP networks. If an endstation in VLAN 1 is moved to a port in another part of the network, you only need to specify that the new port is in VLAN 1.

It helps to control broadcast traffic. If an endsta-

■

tion in VLAN 1 transmits a broadcast frame, then only VLAN 1 devices receive the frame.

It provides extra security. Devices in VLAN 1 can

■

only communicate with devices in VLAN 2 using a router.

For more information about setting up VLANs on the Switch, refer to “

Virtual LANs (VLANs)” on page

5-1.

Spanning Tree Protocol

The Switch 1000 supports the Spanning Tree Protocol (STP) which is a bridge-based system for providing fault tolerance on networks. STP allows you to implement parallel paths for network traffic, and ensure that:

Redundant paths are disabled when the main

■

paths are operational.

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Redundant paths are enabled if the main traffic paths fail.

Switch 1000 on Your Network

For more information about STP, refer to “

Spanning

Tree Protocol” on page 5-12.

PACE

The Switch 1000 supports PACE (Priority Access Control Enabled) technology, which allows multimedia traffic to be carried over standard Ethernet and Fast Ethernet LANs. PACE provides two features:

■

Implicit Class of Service

— When multimedia traffic is transmitted, it is given a higher priority than other data and is therefore forwarded ahead of other data when it arrives at the Switch. The Implicit Class of Service feature minimizes latency through the Switch and protects the quality of multimedia traffic.

■

Interactive Access

— When two-way multimedia traffic passes over an Ethernet network, interference can occur because access to the bandwidth is unequally allocated to traffic in one direction. The Interactive Access feature allocates the available bandwidth equally in both directions, therefore increasing the quality of the traffic.

For more information about setting up PACE on the Switch, refer to “

Setting Up the Switch Ports” in Chapter 4.

“

Setting Up the Switch Unit” and

Server Connections

When connecting servers to the Switch 1000, use the following rules to ensure that the Switch is operating at maximum efficiency:

■

Ideally, any local server should be connected to the Switch using a 100Mbps port.

■

If that is not possible, connect the local server to a dedicated 10Mbps port.

■

If that is not possible and the local server is connected to a repeated segment where the traffic is mainly local to that segment, disable Intelligent Flow Management (IFM) on the port to which the repeater is connected.

If your network is running a peer-to-peer protocol (for example, Windows 95) and you have multiple endstations connected to the Switch via a repeater, we recommend that you disable IFM on the port to which the repeater is connected.

Network Configuration Examples

The following illustrations show some examples of how the Switch can be placed on your network.

Examples of how the Switch 1000 can be used in a VLAN-based network are given in Chapter 5

Network Segmentation I

This example shows how the Switch 1000 fits into a large corporate network with a Fast Ethernet infrastructure. A Switch is positioned on each floor and servers are centralized in the basement.

Switch 1000 on Your Network 1-7

Figure 1-1

The Switch 1000 in a large corporate network

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Network Segmentation II

This example shows the Switch 1000 in a second workgroup situation. This setup could be that of a small office within a large corporation, or part of a larger corporate network. Most of the switch ports have multiple endstations.

Figure 1-2

The Switch 1000 in a workgroup

Desktop Switching

This example shows Switch 1000 used for a group of heavy-traffic users in a large corporate network. Here switching is brought to the desktop with a single endstation per switch port. A local server is connected using the 100Mbps Fast Ethernet link.

Switch 1000 on Your Network 1-9

Figure 1-3

The Switch 1000 as a desktop switch

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Unit Overview — Front

Figure 1-4

Switch 1000 front view: 3C16901A

top

, 3C16900A

bottom

Unit Overview — Front 1-11

10BASE-T Ports

The Switch has 12 or 24 10BASE-T RJ45 ports configured as MDIX (cross-over), which provide a full 10Mbps bandwidth to attached endstations. The maximum segment length is 100m (328ft) over category 3, 4, or 5 UTP cable.

As these ports are configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 10BASE-T ports in 3Com devices are MDIX-only.

100BASE-TX Port

The Switch has a single Fast Ethernet 100BASE-TX RJ45 port configured as MDIX (cross-over), which provides a 100Mbps connection to, for example, a local server. The maximum segment length is 100m (328ft) over category 5 UTP or STP cable.

As this port is configured as MDIX (cross-over), you need to use a cross-over cable to connect to devices whose ports are MDIX-only. Most of the 100BASE-TX ports in 3Com devices are MDIX-only.

LEDs

The table below describes the LED behavior on the Switch. For more details about corrective action in the event of a problem, refer to “

C-1.

LEDs” on page

LED Color Indicates

TCVR Yellow Port 1 is a Transceiver Module fitted to the

Port Status LEDs

Packet Yellow Frames are being transmitted/received on the

Status Green Link is present; port is enabled.

Green flashing Link is present; port is disabled.

Off Link is not present.

Plug-in Module Status LEDs

Packet Yellow Frames are being transmitted/received on the

Status Green Link is present; port is enabled.

Green flashing Link is present; port is disabled.

Green flashing (long on, short off)

Yellow Plug-in Module has failed its Power On Self

Yellow flashing Plug-in Module is not recognized.

Off Link is not present or Plug-in Module is not

Unit Status LEDs

Power

MGMT

Green Switch is powered-up.

Green Switch is operating normally.

Green flashing Switch or Plug-in Module is either down-

Yellow Switch has failed its Power On Self Test.

Yellow flashing Plug-in Module has failed its Power On Self

rear of the unit.

port.

Plug-in Module port.

Refer to the “

OC-3c Module User Guide”

Test (if the MGMT LED is flashing yellow), or the agent software of the Plug-in Module is not installed correctly.

installed in the Switch.

loading software or initializing (which includes a Power On Self Test).

Tes t.

SuperStack II Switch ATM

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Figure 1-5

Switch 1000 rear view

Unit Overview — Rear 1-13

Power Socket

The Switch 1000 automatically adjusts to the supply voltage. The fuse is suitable for both 110V A.C. and 220–240V A.C. operation. For information on replacing fuses, refer to Appendix A

Unit Serial Number

You may need this serial number for fault reporting purposes.

Redundant Power System Socket

Use one of these sockets to connect a SuperStack II Redundant Power System (RPS) to the unit. You can use either socket. Refer to “

dant Power System (RPS)” on page 2-6.

Connecting a Redun-

Reset Button

Using the reset button simulates a power-off/on cycle. This has the same effect as carrying out a reset via the VT100 interface; refer to “

Switch” on page 4-27.

Console Port

Connect a terminal to the console port to carry out remote or local out-of-band configuration and management. The console port is set to auto-baud, 8 data bits, no parity, and 1 stop bit.

Resetting the

Plug-in Module Slot

Use this slot to install a Plug-in Module. The Module can be used to provide a high speed link to the rest of your network. 3Com provides a range of Plug-in Modules; contact your supplier for availability.

When a Plug-in Module is not installed, ensure the blanking plate is secured in place.

Transceiver Module Slot

Use this slot to connect a Transceiver Module and provide a 10Mbps link to the rest of the network. Port 1 is automatically switched from the front 10BASE-T port to the Transceiver Module port when a Module is installed. 3Com provides a range of Transceiver Modules; contact your supplier for availability.

When a Transceiver Module is not installed, ensure the blanking plate is secured in place.

Ethernet Address

This label shows the unique Ethernet (or MAC) address assigned to the unit.

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Unit Defaults

The following table shows the factory defaults for the Switch 1000 features.

Port Status Forwarding Mode Intelligent Flow

Management Duplex Mode Virtual LANs

PACE Spanning Tree (STP) Power On Self Test

(POST) System Alarm

(broadcast bandwidth used)

System Alarm (errors per 10,000 packets)

System Alarm (bandwidth used)

System Alarm (percentage of frames forwarded)

Enabled

Fast Forward

Enabled

Half duplex on all relevant ports

All ports use Port VLAN Mode and belong to the Default VLAN (VLAN 1)

Disabled

Normal (Fast Boot)

Enabled

■

High threshold: 20% — Notify and Blip

■

Low threshold: 10% — No action

Enabled

■

High threshold: 2% — Notify

■

Low threshold: 1% — No action

Enabled

■

High threshold: 85% — No action

■

Low threshold: 50% — No action

Enabled

■

High threshold: 85% — No action

■

Low threshold: 50% — No action

Managing the Switch 1000

The menu-driven interface built into the Switch 1000 is known as the VT100 interface. You can access it using a VT100 terminal, or a PC using terminal emulation software. You can connect the terminal directly to the Switch or through a modem. You can also access the VT100 interface remotely using Telnet running over the TCP/IP protocol.

Remote management is also possible using a Network Manager from 3Com’s Transcend range. The management protocol is SNMP (Simple Network Management Protocol) and any SNMP-based management facility can manage the unit if the Management Information Base (MIB) is installed correctly in the management workstation. The Switch 1000 supports SNMP over both IP and IPX protocols.

product

Quick Start For SNMP Users

This section describes how to get started if you want to use an SNMP Network Manager to manage the Switch. It assumes you are already familiar with SNMP management.

If you are using IP and you have a BOOTP server

■

set up correctly on your network, the IP address for the Switch is detected automatically and you can start managing the Switch without any further configuration.

If you are using the IPX protocol, the Switch

■

1000 is allocated an IPX address automatically. You can start the SNMP Network Manager and begin managing the Switch.

If you are using IP without a BOOTP server, you

■

must enter the IP address of the Switch before the SNMP Network Manager can communicate with the device. To do this, refer to “

IP Address for the Switch” below.

Entering an

Quick Start For SNMP Users 1-15

At the Main Banner screen, press [Return] to dis-

play the Logon screen. Log on using the default user name

admin

(no password is required). Select

OK. The Main Menu is displayed. From this menu, select

the MANAGEMENT SETUP option. The Switch Management Setup screen is displayed.

On the Management Setup screen, fill in the follow-

ing fields:

Device IP Address

■

Device SubNet Mask (if necessary)

■

Default Router (if necessary)

■

For further information on the Management Setup screen, refer to “

Setting Up the Switch for Manage-

ment” on page 3-6.

If you need the Switch 1000 to send SNMP traps to

the Network Manager, you may need to set up the address of the Network Manager in the Trap Table. Refer to “

Setting Up Traps” on page 4-24.

If you need more information about IP and IPX, refer

Managing Over The Network” on page 3-2.

to “

Entering an IP Address for the Switch

Connect a terminal to the console port of the

Switch 1000, refer to “

Connecting a VT100 Terminal” on page 2-7. The terminal should be config-

ured to 9600 line speed (baud rate), 8 data bits, no parity, and 1 stop bit.

Press [Return] one or more times until the Main

Banner screen appears.

3Com Network Managers such as Transcend Enterprise Manager for Windows may automatically configure the Switch 1000 to send traps to them. Please read the documentation supplied with your network management software.

When you have finished with the Management

Setup screen, select OK.

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ETTING STARTED

NSTALLATION AND

Following 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.

Positioning the Switch 1000

The Switch is suited for use in the office where it can be wall-mounted, mounted in a standard 19-inch equipment rack, or free standing. Alternatively, the unit can be rack-mounted in a wiring closet or equipment room. A wall-mounting / rack-mounting kit, containing two mounting brackets and six screws, is supplied with the Switch.

When deciding where to position the unit, ensure that:

ETU

Cabling is away from:

■

Sources of electrical noise such as radios,

■

transmitters and broadband amplifiers. Power lines and fluorescent lighting fixtures.

■

Water or moisture cannot enter the case of the

■

unit. Air-flow around the unit and through the vents in

■

the side of the case is not restricted. We recommend that you provide a minimum 25mm (1in.) clearance.

No objects are placed on top of the unit.

■

Units are not stacked more than four high if

■

free-standing.

You are able to meet the configuration rules

■

detailed in the following section. The unit is accessible and cables can be con-

■

nected easily.

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NSTALLATION AND SETUP

Configuration Rules for Fast Ethernet

The topology rules for 100Mbps Fast Ethernet are slightly different to those for 10Mbps Ethernet. Figure 2-1 illustrates the key topology rules and provides examples of how they allow for large-scale Fast Ethernet networks.

The key topology rules are:

■

Maximum UTP cable length is 100m (328ft) over category 5 cable.

■

A 412m (1352ft) fiber run is allowed for connecting switch to switch, or endstation to switch, using half-duplex 100BASE-FX.

■

A total network span of 325m (1066ft) is allowed in single-repeater topologies (one hub stack per wiring closet with a fiber run to the collapsed backbone). For example, a 225m (738ft) fiber downlink from a repeater to a router or switch, plus 100m (328ft) UTP run from a repeater out to the endstations.

With full duplex, the Ethernet topology rules are the same, but the Fast Ethernet rules are:

■

Maximum UTP cable length is 100m (328ft) over category 5 cable

■

A 2km (6562ft) fiber run is allowed for connecting switch-to-switch, or endstation-to-switch

Configuration Rules with Full Duplex

The Switch provides full duplex support for all its fixed Ethernet and Fast Ethernet ports, and Fast Ethernet Plug-in Module ports. Full duplex allows frames to be transmitted and received simultaneously and, in effect, doubles the potential throughput of a link.

Configuration Rules with Full Duplex 2-3

Figure 2-1

Fast Ethernet configuration rules

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NSTALLATION AND SETUP

Installing the Switch 1000

Rack Mounting

The Switch is 1.5U high and fits in most standard 19-inch racks.

CAUTION: Disconnect all cables from the Switch before continuing. Remove all self adhesive pads from the underside of the unit, if fitted.

Place the unit the right way up on a hard flat surface, with the front facing towards you.

Locate a mounting bracket over the mounting holes on one side of the unit, as shown in Figure 2-2.

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

Repeat steps 2 and 3 for the other side of the unit.

Insert the unit into the 19-inch rack and secure with suitable screws (not provided). Ensure that ventilation holes are not obstructed.

Connect network cabling.

Stacking the Switch and Other Units

If the units are free standing, up to four units can be placed on top of one another. If mixing a variety of SuperStack II Switch and Hub units, the smaller units must be positioned at the top.

The Switch is supplied with four self-adhesive rubber pads. Apply the pads to the underside of the unit, stick one in the marked area at each corner of the unit. Place the units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit.

Figure 2-2

Fitting a bracket for rack mounting

Wall Mounting

A single Switch can be wall-mounted.

Installing the Switch 1000 2-5

CAUTION:

Disconnect any cables from the unit before continuing. Remove self-adhesive pads from the underside of the unit if they have been previously fitted.

Place the Switch the right way up on a hard flat sur-

face, with the front facing towards you. Locate a mounting bracket over the mounting

holes on one side of the unit, as shown in Figure 2-3.

Insert the two screws and tighten with a suitable

screwdriver. Repeat for the other side of the unit.

Ensure that the wall you are going to use is smooth,

flat, dry and sturdy. Attach a piece of plywood, approximately 305mm x 510mm x 12mm (12in. x 20in. x 0.5in.) securely to the wall if necessary, and mount the Switch as follows:

Position the base of the unit against the wall (or

plywood) ensuring that the ventilation holes face sidewards. Mark on the wall the position of the screw holes in both wall brackets. Drill the four holes.

Figure 2-3

Fitting a bracket for wall mounting

Using suitable fixings and screws (not provided),

attach the Switch unit securely to the wall or plywood.

Connect network cabling.

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NSTALLATION AND SETUP

Powering-up the Switch

Connect the power cord to the IEC socket on the rear of the Switch, and to your mains socket.

The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is through the power cord.

The Switch enters a Power On Self Test (POST). The time taken for the test to complete is dependent on the type of POST configured (refer to “

Management Setup” on page 3-9 for details of how

to configure the type of POST). For a new Switch that is being installed for the first time, power-up takes approximately 13 seconds.

Check the status LEDs to ensure the Switch is operating correctly (refer to “

Switch

LEDs” on page 1-11).

Connecting a Redundant Power System (RPS)

You can connect a SuperStack® II Redundant Power System (RPS) to the Switch.

At +5V, the current requirement for the Switch is

4.8A, including any Transceiver Module that might be fitted, but excluding a Plug-in Module. Check the documentation supplied with your Plug-in Module for power consumption figures.

For most configurations, you need only one Superstack II RPS output, and this can be connected to either of the two sockets on the rear of the unit.

If the current consumption of the Switch plus any Plug-in Module exceeds the capability of the RPS (8.5A), you need a SuperStack II Advanced RPS with one Advanced RPS 100W Module.

If the RPS is used incorrectly, its Output Fault LED lights yellow.

You should check the documentation supplied with the RPS or Advanced RPS to see if the outputs can be used in parallel.

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