Cisco Catalyst 2950 Command Reference Manual page 15

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:
•
•
•
OL-10102-01
Commands and keywords are in boldface text.
Arguments for which you supply values are in italic.
Square brackets ([ ]) mean optional elements.
Catalyst 2950 and Catalyst 2955 Switch Command Reference
xv