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Catalyst 2960 and 2960-S Switch Software Configuration Guide
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Chapter 33 Configuring QoS
Configuring Standard QoS
To return a port to its non-trusted state, use the no mls qos trust interface configuration command. To
return to the default DSCP-to-DSCP-mutation map values, use the no mls qos map dscp-mutation
dscp-mutation-name global configuration command.
This example shows how to configure a port to the DSCP-trusted state an d to modify the
DSCP-to-DSCP-mutation map (named gi0/2-mutation) so that incoming DSCP values 10 to 13 are
mapped to DSCP 30:
Switch(config)# mls qos map dscp-mutation gi0/2-mutation 10 11 12 13 to 30
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# mls qos trust dscp
Switch(config-if)# mls qos dscp-mutation gi0/2-mutation
Switch(config-if)# end
Configuring a QoS Policy
Configuring a QoS policy typically requires classifying traffic into classes, configuring policies applied
to those traffic classes, and attaching policies to ports.
Note To use policing and marking, the switch must be running the LAN Base image.
For background information, see the “Classification” section on page 33-5 an d the “Policing and
Marking” section on page 33-9. For configuration guidelines, see the “Standard QoS Configuration
Guidelines” section on page 33-38.
These sections describe how to classify, police, and mark traffic. Depending on your network
configuration, you must perform one or more of these tasks:
• Classifying Traffic by Using ACLs, page 33-48
• Classifying Traffic by Using Class Maps, page 33-51
• Classifying, Policing, and Marking Traffic on Physical Ports by Using Policy Maps, page 33-53
• Classifying, Policing, and Marking Traffic by Using Aggregate Policers, page 33-58
Step 7 show mls qos maps dscp-mutation Verify your entries.
Step 8 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose