CHAPTER
14-1
Ethernet Card Software Feature and Configuration Guide, R7.2
January 2009
14
Configuring Quality of Service
This chapter describes the quality of service (QoS) features built into your ML-Series card and how to
map QoS scheduling at both the system and interface levels.
This chapter contains the following major sections:
Understanding QoS, page 14-1
ML-Series QoS, page 14-4
QoS on Cisco Proprietary RPR, page 14-10
Configuring QoS, page 14-12
Monitoring and Verifying QoS Configuration, page 14-17
QoS Configuration Examples, page 14-18
Understanding Multicast QoS and Priority Multicast Queuing, page 14-24
Configuring Multicast Priority Queuing QoS, page 14-25
QoS not Configured on Egress, page 14-27
ML-Series Egress Bandwidth Example, page 14-27
Understanding CoS-Based Packet Statistics, page 14-29
Configuring CoS-Based Packet Statistics, page 14-29
Understanding IP SLA, page 14-31
The ML-Series card employs the Cisco IOS Modular QoS command-line interface (CLI), known as the
MQC. For more information on general MQC configuration, refer to the following Cisco IOS
documents:
Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2 at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122mindx/l22index.htm
Cisco IOS Quality of Service Solutions Command Reference, Release 12.2 at th is URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_r/index.htm

Understanding QoS

QoS is the ability of the network to provide better or special treatment to a set of services to the detriment
of less critical services. The ML-Series card uses QoS to dynamically allocate transmission bandwidth
for the different services it multiplexes onto the SONET/SDH circuit. Through QoS, you can configure