Cisco Cisco Gigabit Ethernet Switch Module (CGESM) for HP Références techniques

If you specify trust ip-precedence, QoS uses the IP precedence value from the ingress packet and the 
IP-precedence-to-DSCP map. For non-IP packets that are tagged, QoS uses the received CoS value; for 
non-IP packets that are untagged, QoS uses the default port CoS value. In either case, the DSCP for the 
packet is derived from the CoS-to-DSCP map.

To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode, 
use the end command.

This example shows how to define a port trust state to trust incoming DSCP values for traffic classified 
with class1:

Switch(config)# policy-map policy1

Switch(config-pmap)# class class1

Switch(config-pmap-c)# trust dscp

Switch(config-pmap-c)# police 1000000 20000 exceed-action policed-dscp-transmit

Switch(config-pmap-c)# exit

You can verify your settings by entering the show policy-map privileged EXEC command.

Defines a traffic classification match criteria (through the police, set, 
and trust policy-map class configuration commands) for the 
specified class-map name.

Defines a policer for classified traffic.

Creates or modifies a policy map that can be attached to multiple 
ports to specify a service policy.

Classifies IP traffic by setting a DSCP or IP-precedence value in the 
packet.

Displays QoS policy maps.