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CHAPTER
23-1
Cisco Systems Intelligent Gigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
23
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 Cisco Systems Intelligent Gigabit
Ethernet Switch Module 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.
Table 23-1 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, see the command
reference for this release.
The switch supports some of the modular QoS CLI (MQC) commands. For more information about the
MQC commands, see 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.htm#89799
QoS can be configured either by using CiscoWorks or the command-line interface (CLI).
This chapter consists of these sections:
• Understanding QoS, page 23-2
• Configuring Auto-QoS, page 23-9
• Displaying Auto-QoS Information, page 23-13
• Auto-QoS Configuration Example, page 23-14
• Configuring Standard QoS, page 23-16
Table 23-1 Sections Describing Standard Software Features
Topic Section
Queueing and scheduling at the
egress ports
“Queueing and Scheduling” section on page 23-7
Configuring QoS “Configuring Standard QoS” section on page 23-16
“Default Standard QoS Configuration” section on page 23-16
“Configuring Classification Using Port Trust States” section on
page 23-17
“Configuring the Egress Queues” section on page 23-34