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:

Command

Purpose

 

 

Router(config-pmap-c)# set {dscp dscp_value

Configures the policy map class to mark matched untrusted

precedence ip_precedence_value}

traffic with the configured DSCP or IP precedence value.

Router(config-pmap-c)# no set {dscp dscp_value

Clears the marking configuration.

precedence ip_precedence_value}

 

 

 

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:

Command

Purpose

 

 

Router(config-pmap-c)# trust {cos dscp

Configures the policy map class trust state, which selects the

ip-precedence}

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).

 

 

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-precedencekeyword, PFC QoS sets DSCP from received IP precedence.

 

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

 

 

 

 

 

 

OL-4266-08

 

 

42-75

 

 

 

 

 

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Cisco Systems OL-4266-08 manual Configuring Policy Map Class Marking, Configuring the Policy Map Class Trust State, 42-75
Page 74 Page 76

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