Cisco Systems 4500 MQC-Based QoS Configuration

37-63
Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 37 Configuring Quality of Service Configuring QoS on Supervisor Engine 6-E, Supervisor Engine 6L-E, Catalyst 4900M, and Catalyst 4948E
Configuring QoS on Supervisor Engine 6-E, Supervisor Engine
6L-E, Catalyst 4900M, and Catalyst 4948E
Note QoS functionality on Catalyst 4900M, Catalyst 4948E, Supervisor Engine 6-E, and Supervisor Engine
6L-E are equivalent.
Note Hierarchical QoS is not supported on Supervisor Engine 6-E, Supervisor Engine 6L-E, Catalyst 4900M,
and Catalyst 4948E.
This section includes these topics:
• MQC-Based QoS Configuration, page 37-63
• MQC-Based QoS on the Supervisor Engine 6-E and 6L-E, page 37-64
• Platform-Supported Classification Criteria and QoS Features, page 37-65
• Platform Hardware Capabilities, page 37-66
• Prerequisites for Applying a QoS Service Policy, page 37-66
• Restrictions for Applying a QoS Service Policy, page 37-66
• Classification, page 37-66
• Policing, page 37-67
• Marking Network Traffic, page 37-69
• Shaping, Sharing (Bandwidth), Priority Queuing, Queue-Limiting and DBL, page 37-75
• Configuring CoS Mutation, page 37-88
• Configuring System Queue Limit, page 37-89
MQC-Based QoS Configuration
Starting with Cisco IOS Release 12.2(40)SG, Catalyst 4900M, Catalyst 4948E, or Catalyst 4500 series
switch with Supervisor Engine 6-E or Supervisor Engine 6L-E uses the MQC model of QoS. To apply
QoS, you use the modular QoS command-line interface (MQC), which is a CLI structure that allows you
to complete the following tasks:
• Specify the matching criteria used to define a traffic class.
• Create a traffic policy (policy map). The traffic policy defines the QoS polic y actions t o be taken for
each traffic class.
• Apply the policy actions specified in the policy map to an interface, VLAN, or port and VLAN.
For more information about the MQC, see the “Modular Quality of Service Command-Line Interface”
section of the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.3.
Note The MQC model does not support the trust feature, which is available in the switch qos model on
Supervisor Engines II-Plus through V-10GE. In the MQC model supported on Supervisor Engine 6-E,
Supervisor Engine 6L-E, Catalyst 4900M, and Catalyst 4948E, the incoming traffic is considered trusted