Catalyst 2950 and Catalyst 2955 Switch Command Reference, 12.1(22)EA11 and Later - Preface [Cisco Catalyst 2950 Series Switches]

Table Of Contents

Preface

Preface

Audience

This guide is for the networking professional using the Cisco IOS command-line interface (CLI) to manage the Catalyst 2950 and 2955 switches, hereafter referred to as the switches. Before using this guide, you should have experience working with the Cisco IOS and be familiar with the concepts and terminology of Ethernet and local area networking.

Purpose

The Catalyst 2950 switch is supported by either the standard software image (SI) or the enhanced software image (EI). The Catalyst 2955 and the Catalyst 2950 Long-Reach Ethernet (LRE) switches are supported only by the EI. The EI provides a richer set of features, including access control lists (ACLs), enhanced quality of service (QoS) features, extended-range VLANs, the IEEE 802.1s Multiple STP, Remote Switched Port Analyzer (RSPAN), and unicast MAC address filtering.

This guide provides the information you need about the commands that have been created or changed for use with the Catalyst 2950 family of switches. For information about the standard Cisco IOS Release 12.1 commands, see the Cisco IOS documentation set available from the Cisco.com home page by selecting Service and Support > Technical Documents. On the Cisco Product Documentation home page, select Release 12.1 from the Cisco IOS Software drop-down list.

This guide does not provide procedures for configuring your switch. For detailed configuration procedures, see the software configuration guide for this release.

This guide does not describe system messages you might encounter. For more information, see the system message guide for this release.

For documentation updates, see the release notes for this release.

Conventions

This guide uses these conventions to convey instructions and information:

Command descriptions use these conventions:

•Commands and keywords are in boldface text.

•Arguments for which you supply values are in italic.

•Square brackets ([ ]) mean optional elements.

•Braces ({ }) group required choices, and vertical bars ( | ) separate the alternative elements.

•Braces and vertical bars within square brackets ([{ | }]) mean a required choice within an optional element.

Interactive examples use these conventions:

•Terminal sessions and system displays are in screen font.

•Information you enter is in boldface screen font.

•Nonprinting characters, such as passwords or tabs, are in angle brackets (< >).

Notes, cautions, and tips use these conventions and symbols:

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this manual.

Caution Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.

Related Publications

These documents provide complete information about the switch and are available from this URL:

http://www.cisco.com/en/US/products/ps6738/tsd_products_support_series_home.html

http://www.cisco.com/en/US/products/hw/switches/ps628/tsd_products_support_series_home.html

•Release Notes for the Catalyst 2955, Catalyst 2950, and Catalyst 2940 Switches

•Catalyst 2955, 2950 and 2940 Switch System Message Guide

Note Switch requirements and procedures for initial configurations and software upgrades tend to change and therefore appear only in the release notes. Before installing, configuring, or upgrading the switch, see the release notes on Cisco.com for the latest information.

For information about the switch, see these documents:

•Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide

•Catalyst 2950 and Catalyst 2955 Switch Command Reference

•Device manager online help (available on the switch)

•Catalyst 2950 Switch Hardware Installation Guide

•Catalyst 2950 Switch Getting Started Guide

•Regulatory Compliance and Safety Information for the Catalyst 2950 Switch

•Catalyst 2955 Hardware Installation Guide

For information about related products, see these documents:

•Catalyst GigaStack Gigabit Interface Converter Hardware Installation Guide

•CWDM Passive Optical System Installation Note

•1000BASE-T Gigabit Interface Converter Installation Notes

•Cisco LRE CPE Hardware Installation Guide

•Installation and Warranty Notes for the Cisco LRE 48 POTS Splitter

•Getting Started with Cisco Network Assistant

•Release Notes for Cisco Network Assistant

•Cisco Small Form-Factor Pluggable Modules Installation Notes

•Cisco CWDM GBIC and CWDM SFP Installation Note

•For information about the Network Admission Control (NAC) features, see the Network Admission Control Software Configuration Guide

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

	Catalyst 2950 and Catalyst 2955 Switch Command Reference, 12.1(22)EA11 and Later
	Preface
Catalyst 2950 and Catalyst 2955 Switch Command Reference, 12.1(22)EA11 and Later Index Preface Using the Command-Line Interface Catalyst 2950 and 2955 Switch Cisco IOS Commands - a through r Catalyst 2950 and 2955 Switch Cisco IOS Commands - s Catalyst 2950 and 2955 Switch Cisco IOS Catalyst 2950 and 2955 Switch Cisco IOS Commands - t through z \r\n Catalyst 2955 Alarm Commands Catalyst 2950 and 2955 Switch Boot Loader Commands Catalyst 2950 and 2955 Switch Debug Commands	Download this chapter Preface Download the complete book Catalyst 2950 and Catalyst 2955 Switch Command Reference (full book in PDF format) (PDF - 8 MB) Table Of Contents Preface Preface Audience This guide is for the networking professional using the Cisco IOS command-line interface (CLI) to manage the Catalyst 2950 and 2955 switches, hereafter referred to as the switches. Before using this guide, you should have experience working with the Cisco IOS and be familiar with the concepts and terminology of Ethernet and local area networking. Purpose The Catalyst 2950 switch is supported by either the standard software image (SI) or the enhanced software image (EI). The Catalyst 2955 and the Catalyst 2950 Long-Reach Ethernet (LRE) switches are supported only by the EI. The EI provides a richer set of features, including access control lists (ACLs), enhanced quality of service (QoS) features, extended-range VLANs, the IEEE 802.1s Multiple STP, Remote Switched Port Analyzer (RSPAN), and unicast MAC address filtering. This guide provides the information you need about the commands that have been created or changed for use with the Catalyst 2950 family of switches. For information about the standard Cisco IOS Release 12.1 commands, see the Cisco IOS documentation set available from the Cisco.com home page by selecting Service and Support > Technical Documents. On the Cisco Product Documentation home page, select Release 12.1 from the Cisco IOS Software drop-down list. This guide does not provide procedures for configuring your switch. For detailed configuration procedures, see the software configuration guide for this release. This guide does not describe system messages you might encounter. For more information, see the system message guide for this release. For documentation updates, see the release notes for this release. Conventions This guide uses these conventions to convey instructions and information: Command descriptions use these conventions: •Commands and keywords are in boldface text. •Arguments for which you supply values are in italic. •Square brackets ([ ]) mean optional elements. •Braces ({ }) group required choices, and vertical bars ( \| ) separate the alternative elements. •Braces and vertical bars within square brackets ([{ \| }]) mean a required choice within an optional element. Interactive examples use these conventions: •Terminal sessions and system displays are in `screen` font. •Information you enter is in boldface screen font. •Nonprinting characters, such as passwords or tabs, are in angle brackets (< >). Notes, cautions, and tips use these conventions and symbols: Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this manual. Caution Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data. Related Publications These documents provide complete information about the switch and are available from this URL: http://www.cisco.com/en/US/products/ps6738/tsd_products_support_series_home.html http://www.cisco.com/en/US/products/hw/switches/ps628/tsd_products_support_series_home.html •Release Notes for the Catalyst 2955, Catalyst 2950, and Catalyst 2940 Switches •Catalyst 2955, 2950 and 2940 Switch System Message Guide Note Switch requirements and procedures for initial configurations and software upgrades tend to change and therefore appear only in the release notes. Before installing, configuring, or upgrading the switch, see the release notes on Cisco.com for the latest information. For information about the switch, see these documents: •Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide •Catalyst 2950 and Catalyst 2955 Switch Command Reference •Device manager online help (available on the switch) •Catalyst 2950 Switch Hardware Installation Guide •Catalyst 2950 Switch Getting Started Guide •Regulatory Compliance and Safety Information for the Catalyst 2950 Switch •Catalyst 2955 Hardware Installation Guide For information about related products, see these documents: •Catalyst GigaStack Gigabit Interface Converter Hardware Installation Guide •CWDM Passive Optical System Installation Note •1000BASE-T Gigabit Interface Converter Installation Notes •Cisco LRE CPE Hardware Installation Guide •Installation and Warranty Notes for the Cisco LRE 48 POTS Splitter •Getting Started with Cisco Network Assistant •Release Notes for Cisco Network Assistant •Cisco Small Form-Factor Pluggable Modules Installation Notes •Cisco CWDM GBIC and CWDM SFP Installation Note •For information about the Network Admission Control (NAC) features, see the Network Admission Control Software Configuration Guide Obtaining Documentation and Submitting a Service Request For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
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