Catalyst 2960 Switch Software Configuration Guide - Cisco

Catalyst 2960 Switch

Software Configuration Guide

Cisco IOS Release 12.2(40)SE

Revised September 2007

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Text Part Number: OL-8603-04

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Catalyst 2960 Switch Software Configuration Guide

? 2006-2007 Cisco Systems, Inc. All rights reserved.

C O N T E N T S

Preface

xxix

Audience

Purpose

xxix

xxix

Conventions

xxx

Related Publications

xxx

Obtaining Documentation, Obtaining Support, and Security Guidelines

CHAPTER

1

Overview

1-1

Features 1-1

Ease-of-Deployment and Ease-of-Use Features

Performance Features 1-2

Management Options 1-3

Manageability Features 1-4

Availability and Redundancy Features 1-6

VLAN Features 1-7

Security Features 1-7

QoS and CoS Features 1-9

Monitoring Features 1-10

Default Settings After Initial Switch Configuration

1-1

1-10

Network Configuration Examples 1-12

Design Concepts for Using the Switch 1-12

Small to Medium-Sized Network Using Catalyst 2960 Switches

Long-Distance, High-Bandwidth Transport Configuration 1-17

Where to Go Next

CHAPTER

2

xxxii

1-16

1-18

Using the Command-Line Interface

Understanding Command Modes

Understanding the Help System

2-1

2-1

2-3

Understanding Abbreviated Commands

2-4

Understanding no and default Forms of Commands

Understanding CLI Error Messages

Using Configuration Logging

2-4

2-5

2-5

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Contents

Using Command History 2-6

Changing the Command History Buffer Size 2-6

Recalling Commands 2-6

Disabling the Command History Feature 2-7

Using Editing Features 2-7

Enabling and Disabling Editing Features 2-7

Editing Commands through Keystrokes 2-7

Editing Command Lines that Wrap 2-9

Searching and Filtering Output of show and more Commands

2-10

Accessing the CLI 2-10

Accessing the CLI through a Console Connection or through Telnet

CHAPTER

3

Assigning the Switch IP Address and Default Gateway

Understanding the Boot Process

2-10

3-1

3-1

Assigning Switch Information 3-2

Default Switch Information 3-3

Understanding DHCP-Based Autoconfiguration 3-3

DHCP Client Request Process 3-4

Configuring DHCP-Based Autoconfiguration 3-5

DHCP Server Configuration Guidelines 3-5

Configuring the TFTP Server 3-6

Configuring the DNS 3-6

Configuring the Relay Device 3-6

Obtaining Configuration Files 3-7

Example Configuration 3-8

Manually Assigning IP Information 3-10

Checking and Saving the Running Configuration

3-10

Modifying the Startup Configuration 3-11

Default Boot Configuration 3-12

Automatically Downloading a Configuration File 3-12

Specifying the Filename to Read and Write the System Configuration

Booting Manually 3-13

Booting a Specific Software Image 3-14

Controlling Environment Variables 3-14

3-12

Scheduling a Reload of the Software Image 3-16

Configuring a Scheduled Reload 3-16

Displaying Scheduled Reload Information 3-17

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CHAPTER

4

Configuring Cisco IOS CNS Agents

4-1

Understanding Cisco Configuration Engine Software 4-1

Configuration Service 4-2

Event Service 4-3

NameSpace Mapper 4-3

What You Should Know About the CNS IDs and Device Hostnames

ConfigID 4-3

DeviceID 4-4

Hostname and DeviceID 4-4

Using Hostname, DeviceID, and ConfigID 4-4

Understanding Cisco IOS Agents 4-5

Initial Configuration 4-5

Incremental (Partial) Configuration

Synchronized Configuration 4-6

4-3

4-6

Configuring Cisco IOS Agents 4-6

Enabling Automated CNS Configuration 4-6

Enabling the CNS Event Agent 4-8

Enabling the Cisco IOS CNS Agent 4-9

Enabling an Initial Configuration 4-9

Enabling a Partial Configuration 4-11

Displaying CNS Configuration

CHAPTER

5

Clustering Switches

4-12

5-1

Understanding Switch Clusters 5-1

Cluster Command Switch Characteristics 5-3

Standby Cluster Command Switch Characteristics 5-3

Candidate Switch and Cluster Member Switch Characteristics

5-3

Planning a Switch Cluster 5-4

Automatic Discovery of Cluster Candidates and Members 5-4

Discovery Through CDP Hops 5-5

Discovery Through Non-CDP-Capable and Noncluster-Capable Devices

Discovery Through Different VLANs 5-6

Discovery Through Different Management VLANs 5-7

Discovery of Newly Installed Switches 5-8

HSRP and Standby Cluster Command Switches 5-9

Virtual IP Addresses 5-10

Other Considerations for Cluster Standby Groups 5-10

Automatic Recovery of Cluster Configuration 5-11

IP Addresses 5-12

5-6

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