Name: Cisco 2950 - Catalyst Switch
Brand: Cisco
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CHAPTER

30-1

Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide

78-11380-10

Configuring QoS

This chapter describes how to configure quality of service (QoS) by using automatic-QoS (auto-QoS)

commands or by using standard QoS commands. With QoS, you can give preferential treatment to

certain types of traffic at the expense of others. Without QoS, the Catalyst 2950 or Catalyst 2955 switch

offers best-effort service to each packet, regardless of the packet contents or size. It sends the packets

without any assurance of reliability, delay bounds, or throughput.

To use the features described in this chapter, you must have the enhanced software image (EI) installed

on your switch.

If you have the standard software image (SI) installed on your switch, you cannot configure some of the

features. Table 30-1 lists the sections that describe the features that you can configure.

Note For complete syntax and usage information for the commands used in this chapter, refer to the command

reference for this release.

The switch supports some of the modular QoS CLI (MQC) commands. For more information about the

MQC commands, refer to the “Modular Quality of Service Command Line Interface Overview” at this

URL:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/fqcprt8/qcfmdcli.ht

m#89799

QoS can be configured either by using the Cluster Management Suite (CMS) or through the

command-line interface (CLI). Refer to the CMS online help for configuration procedures through CMS.

For information about accessing and using CMS, see Chapter 4, “Getting Started with CMS.”

Table 30-1 Sections Describing Standard Software Features

Topic Section

Queueing and scheduling at the

egress ports

“Queueing and Scheduling” section on page 30-8

Configuring QoS “Configuring Standard QoS” section on page 30-18

“Default Standard QoS Configuration” section on page 30-18

“Configuring Classification Using Port Trust States” section on

page 30-20

“Configuring the Egress Queues” section on page 30-37

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Cisco 2950 - Catalyst Switch Specifications

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