Network Router User Manual

42-75
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 42 Configuring PFC QoS
Configuring PFC QoS
These sections describe policy map class action configuration:
• Configuring Policy Map Class Marking, page 42-75
• Configuring the Policy Map Class Trust State, page 42-75
• Configuring Policy Map Class Policing, page 42-76
Configuring Policy Map Class Marking
In Release 12.2(18)SXF5 and later releases, when the ignore port trust feature is enabled, PFC QoS
supports policy map class marking for all traffic with set policy map class commands.
In all releases, PFC QoS supports policy map class marking for untrusted traffic with set policy map
class commands.
To configure policy map class marking, perform this task:
Note Releases earlier than Release 12.2(18)SXE support the set ip dscp and set ip precedence policy map
class commands.
Configuring the Policy Map Class Trust State
Note You cannot attach a policy map that configures a trust state with the service-policy output command.
To configure the policy map class trust state, perform this task:
When configuring the policy map class trust state, note the following information:
• Enter the no trust command to use the trust state configured on the ingress port (this is the default).
• With the cos keyword, PFC QoS sets the internal DSCP value from received or ingress port CoS.
• With the dscp keyword, PFC QoS uses received DSCP.
• With the ip-precedence keyword, PFC QoS sets DSCP from received IP precedence.
Command Purpose
Router(config-pmap-c)# set {dscp dscp_value |
precedence ip_precedence_value}
Configures the policy map class to mark matched untrusted
traffic with the configured DSCP or IP precedence value.
Router(config-pmap-c)# no set {dscp dscp_value |
precedence ip_precedence_value}
Clears the marking configuration.
Command Purpose
Router(config-pmap-c)# trust {cos | dscp |
ip-precedence}
Configures the policy map class trust state, which selects the
value that PFC QoS uses as the source of the initial internal
DSCP value.
Router(config-pmap-c)# no trust
Reverts to the default policy-map class trust state (untrusted).