A QoS traffic class-to-CoS mutation map can be configured to create a priority mapping table using a traffic-class-cos map. The traffic class-to-CoS map is then applied to an egress interface to effect the priority re-mapping.
If a QoS traffic class-to-CoS mutation map is not defined, the default traffic class-to-CoS map is used, which is a one-to-one map for each priority.
Global configuration mode
A traffic class can be mapped to the outgoing PCP value when a packet egresses the switch. You can create a priority mapping table using a traffic class-to-CoS map. This traffic class-to-CoS map can then be applied to an egress interface to effect the priority re-mapping. This feature only maps the internal traffic class to outgoing priority.
Enter no qos map traffic-class-cos name command to delete the named QoS traffic class-to-CoS mutation map.
A QoS map can only be deleted if it is not bound to an interface.
To create and apply a QoS traffic class-to-CoS mutation map use the following command:
device# configure terminal device(config)# qos map traffic-class-cos CoSMap device(traffic-class-cos-CoSMap)# map traffic-class 3 drop-precedence 1 to cos 2 device(traffic-class-cos-CoSMap)# map traffic-class 4 drop-precedence 1 to cos 3 device(traffic-class-cos-CoSMap)# map traffic-class 5 drop-precedence 2 to cos 4 device(conf-if-eth-1/4)# qos traffic-class-cos tcCos1
To delete a QoS traffic class-to-CoS mutation map that is bound to an interface follow this example.
device# configure terminal device(config)# interface ethernet 1/4 device(conf-if-eth-1/4)# no qos traffic-class-cos CoSMap device(conf-if-eth-1/4)# exit device(config)# no qos map traffic-class-cos CoSMap