Table Of Contents
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Website
Preface
Audience
This guide is for the networking professional using the Cisco IOS command-line interface (CLI) to manage the Catalyst 2950 and Catalyst 2955 switches, hereafter referred to as the switch. 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 switch uses only the EI. The enhanced software image provides a richer set of features, including access control lists (ACLs), enhanced quality of service (QoS) features, extended-range VLANs, the IEEE 802.1W Rapid Spanning Tree Protocol (RSTP), the IEEE 802.1S Multiple Spanning Tree Protocol (MSTP), and and Remote Switched Port Analyzer (RSPAN).
The software supports the switches listed in the release notes and in this table:
Note
This software release does not support the Catalyst 2950 LRE switches. For information about these switches, refer to the Catalyst 2950 LRE switch release notes.
This guide provides the information you need about the CLI commands that have been created or changed for use with the Catalyst 2950 family of switches. For information about the standard IOS Release 12.1 commands, refer to the 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, refer to the Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide for this release.
This guide does not describe system messages you might encounter. For more information, refer to the Catalyst 2950 and Catalyst 2955 Switch System Message Guide for this release.
Organization
This guide is organized into these chapters:
"Using the Command-Line Interface," describes how to access the command modes and use the switch CLI to configure software features. It also lists the commands that have the same function but different syntax in software releases earlier than Release 12.1(6)EA2 and in Release 12.1(6)EA2 or later.
"Cisco IOS Commands," describes in alphabetical order the IOS commands that you use to configure and monitor your switch.
"Catalyst 2955-Specific Alarm Commands," describes the IOS commands that you use to set alarms related to temperature, power supply conditions, and the status of the Ethernet ports.
"Debug Commands," describes the debug privileged EXEC commands. Debug commands are helpful in diagnosing and resolving internetworking problems.
Conventions
This guide uses these conventions to convey instructions and information:
Command descriptions use these conventions:
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Interactive examples use these conventions:
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Notes, cautions, and tips use these conventions and symbols:
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Related Publications
These documents provide complete information about the switch and are available from this URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/index.htm
You can order printed copies of documents with a DOC-xxxxxx= number from the Cisco.com sites and from the telephone numbers listed in the "Obtaining Documentation" section.
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Catalyst 2950 Desktop Switch Software Configuration Guide, Cisco IOS Release 12.1(11)EA1 and Release 12.1(11)YJ (order number DOC-7814982=)
Catalyst 2950 Desktop Switch Command Reference, Cisco IOS Release 12.1(11)EA1 and Release 12.1(11)YJ (order number DOC-7814984=)
Catalyst 2950 Desktop Switch System Message Guide, Cisco IOS Release 12.1(11)EA1 and Release 12.1(11)YJ (order number DOC-7814981=)
Release Notes for the Catalyst 2950 LRE Switch, Cisco IOS Release 12.1(11)YJ (not orderable but is available on Cisco.com)
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at the following sites:
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Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Cisco documentation is available in the following ways:
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http://www.cisco.com/public/ordsum.html
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http://www.cisco.com/go/subscription
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Documentation Feedback
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.
To access Cisco.com, go to the following website:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.
Contacting TAC by Using the Cisco TAC Website
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:
http://www.cisco.com/tac
P3 and P4 level problems are defined as follows:
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In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.
To register for Cisco.com, go to the following website:
http://www.cisco.com/register/
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:
http://www.cisco.com/tac/caseopen
Contacting TAC by Telephone
If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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