Cisco Systems 3750E manual 36-55, Switchconfig# policy-map macpolicy1

Chapter 36 Configuring QoS

Configuring Standard QoS

Switch(config-ext-mac)# exit

Switch(config)# class-map macclass1

Switch(config-cmap)#match access-group maclist1

Switch(config-cmap)# exit

Switch(config)# policy-map macpolicy1

Switch(config-pmap)# class macclass1

Switch(config-pmap-c)# set dscp 63

Switch(config-pmap-c)# exit

Switch(config-pmap)#class macclass2 maclist2

Switch(config-pmap-c)# set dscp 45

Switch(config-pmap-c)# exit

Switch(config-pmap)# exit

Switch(config)# interface gigabitethernet1/0/1

Switch(config-if)# mls qos trust cos

Switch(config-if)#service-policy input macpolicy1

Classifying, Policing, and Marking Traffic on SVIs by Using Hierarchical Policy Maps

You can configure hierarchical policy maps on SVIs, but not on other types of interfaces. Hierarchical policing combines the VLAN- and interface-level policy maps to create a single policy map.

On an SVI, the VLAN-level policy map specifies which traffic class to act on. Actions can include trusting the CoS, DSCP, or IP precedence values or setting a specific DSCP or IP precedence value in the traffic class. Use the interface-level policy map to specify the physical ports that are affected by individual policers.

Follow these guidelines when configuring hierarchical policy maps:

•Before configuring a hierarchical policy map, you must enable VLAN-based QoS on the physical ports that are to be specified at the interface level of the policy map.

•You can attach only one policy map per ingress port or SVI.

•A policy map can contain multiple class statements, each with different match criteria and actions.

•A separate policy-map class can exist for each type of traffic received on the SVI.

•A policy-map trust state and a port trust state are mutually exclusive, and whichever is configured last takes affect.

•If you configure the IP-precedence-to-DSCP map by using the mls qos map ip-prec-dscp

dscp1...dscp8 global configuration command, the settings only affect packets on ingress interfaces that are configured to trust the IP precedence value. In a policy map, if you set the packet IP precedence value to a new value by using the set ip precedence new-precedencepolicy-map class configuration command, the egress DSCP value is not affected by the IP-precedence-to-DSCP map. If you want the egress DSCP value to be different than the ingress value, use the set dscp new-dscppolicy-map class configuration command.

•If you enter or have used the set ip dscp command, the switch changes this command to set dscp in its configuration. If you enter the set ip dscp command, this setting appears as set dscp in the switch configuration.

•You can use the set ip precedence or the set precedence policy-map class configuration command to change the packet IP precedence value. This setting appears as set ip precedence in the switch configuration.

•If VLAN-based QoS is enabled, the hierarchical policy map supersedes the previously configured port-based policy map.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		36-55