41-77
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 41 Configuring PFC QoS
Configuring PFC QoS
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.
Configuring Policy Map Class Policing
When you configure policy map class policing, note the following information:
• PFC QoS does not support the set-qos-transmit policer keyword.
• PFC QoS does not support the set-dscp-transmit or set-prec-transmit keywords as arguments to
the exceed-action keyword.
• PFC QoS does not detect the use of unsupported keywords until you attach a policy map to an
interface.
These sections describe configuration of policy map class policing:
• Using a Named Aggregate Policer, page 41-77
• Configuring a Per-Interface Policer, page 41-78
Note Policing with the conform-action transmit keywords sets the port trust state of matched traffic to trust
DSCP or to the trust state configured by a trust command in the policy map class.
Using a Named Aggregate Policer
To use a named aggregate policer, perform this task:
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).
Command Purpose
Router(config-pmap-c)# police aggregate
aggregate_name
Configures the policy map class to use a previously defined
named aggregate policer.
Router(config-pmap-c)# no police aggregate
aggregate_name
Clears use of the named aggregate policer.
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