ABOUT THIS GUIDE

Conventions

Related Documentation

Documentation Comments

Product Registration

SWITCH FEATURES OVERVIEW

What is Management Software？

Switch Features Explained

Aggregated Links

Auto-negotiation

Multicast Filtering

Resilient Links

Spanning Tree Protocol and Rapid Spanning Tree Protocol

Switch Database

Traffic Prioritization

RMON

Trace Route

VLANs

Automatic IP Configuration

IP Routing

Webcache Support

Broadcast Storm Control

Switch Management Login

3Com XRN Technology

OPTIMIZING BANDWIDTH

Port Features

Duplex

Flow Control

Auto-negotiation

Smart Auto-sensing

Aggregated Links

How 802.3ad Link Aggregation Operates

Implementing 802.3ad Aggregated Links

Aggregated Links and Your Switch

Aggregated Link —Manual Configuration Example

USING MULTICAST FILTERING

What is an IP Multicast？

Benefits of Multicast

Multicast Filtering

Multicast Filtering and Your Switch

IGMP Multicast Filtering

USING RESILIENCE FEATURES

Resilience Feature Overview

What are Resilient Links？

Spanning Tree Protocol (STP)

Rapid Spanning Tree Protocol (RSTP)

What is STP？

How STP Works

STP Requirements

STP Calculation

STP Configuration

STP Reconfiguration

How RSTP Differs to STP

STP Example

STP Configurations

Default Behavior

RSTP Default Behavior

Fast Start Default Behavior

Using STP on a Network with Multiple VLANs

USING THE SWITCH DATABASE

What is the Switch Database？

How Switch Database Entries Get Added

Switch Database Entry States

USING TRAFFIC PRIORITIZATION

What is Traffic Prioritization？

How Traffic Prioritization Works

Traffic Classification

Traffic Marking

Traffic Re-Marking

Traffic Prioritization

Traffic Queues

Configuring Traffic Prioritization on the Switch

Methods of Configuring Traffic Prioritization

Important QoS Considerations

Default QoS Configurations

Example QoS Configurations

STATUS MONITORING AND STATISTICS

RMON

What is RMON？

The RMON Groups

Benefits of RMON

RMON and the Switch

Alarm Events

The Default Alarm Settings

The Audit Log

Email Notification of Events

What is Trace Route？

SETTING UP VIRTUAL LANS

What are VLANs？

Benefits of VLANs

VLANs and Your Switch

The Default VLAN

Closed VLANs

Communication Between VLANs

Creating New VLANs

VLANs： Tagged and　Untagged　Membership

VLAN Configuration Examples

Using Untagged Connections

Using 802.1Q Tagged Connections

USING AUTOMATIC IP CONFIGURATION

How Your Switch Obtains IP Information

How Automatic IP Configuration Works

Automatic Process

Important Considerations

Server Support

Event Log Entries and Traps

IP ROUTING

What is Routing？

Routing in a Subnetworked Environment

Integrating Bridging and Routing

Bridging and Routing Models

What is IP Routing？

Benefits of IP Routing

IP Routing Concepts

Router Interfaces

Routing Tables

VLAN-based Routing

Multiple IP Interfaces per VLAN

Implementing IP Routing

Configuring Manual Aggregated Links (Optional)

Configuring IP VLANs

Configuring Automatic Aggregated Links (LACP)

Establishing IP Interfaces

IP Routing Protocols

Address Resolution Protocol (ARP)

ARP Proxy

Internet Control Message Protocol (ICMP)

Routing Information Protocol (RIP)

User Datagram Protocol (UDP) Helper

Advanced IP Routing Options

Access Control Lists

How Access Control List Rules Work

USING WEBCACHE SUPPORT

What is Webcache Support？

Supported Devices

Benefits of Webcache Support

How Webcache Support Works

Cache Health Checks

Webcache Support Examples

Bridging Over A Single VLAN Example

Routing Over Multiple VLANs Example

Important Considerations

IP Exclusions

MAKING YOUR NETWORK SECURE

What is Switch Management Login？

Benefits of RADIUS Authentication

How RADIUS Authentication Works

Important Considerations

What is RADIUS？

3COM XRN TECHNOLOGY

What is XRN Technology？

Supported Switches

XRN Terminology

Benefits of XRN Technology

XRN Technology Features

Distributed Device Management (DDM)

Distributed Resilient Routing (DRR)

Distributed Link Aggregation (DLA)

How to Implement XRN Technology — Overview

Important Considerations and Recommendations

Recommendations for Achieving Maximum Resilience

Mixed Distributed Fabric Considerations

Network Example using XRN

Single XRN Distributed Fabric Network

Recovering your XRN Network

Unit Failure

Interconnect Failure

How XRN Technology Interacts with other Features

VLANs

Legacy Aggregated Links

STP／RSTP

Resilient Links

How a Failure affects the Distributed Fabric

Loss of a Switch within the XRN Distributed Fabric

Loss of the XRN Interconnect

CONFIGURATION RULES

Configuration Rules for Gigabit Ethernet

Configuration Rules for Fast Ethernet

Configuration Rules with Full Duplex

NETWORK CONFIGURATION EXAMPLES

Network Configuration Examples

Maximizing the Resilience of Your Network

Enhancing the Performance of Your Nework

Utilizing the Traffic Prioritization Features of Your Network

IP ADDRESSING

IP Addresses

Simple Overview

Adravced Overview

Subnets and Subnet Masks

Default Gateways

Sandards,Protocols,and Related Reading

Requests For Comments(RFCS)

Standards Organizations

ADVANCED IP ROUTING CONCEPTS

Variable Length Subnet Masks(VLSMs)

Supetnetting

GLOSSARY

INDEX

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