Cisco Systems EA6500 Manual De Usuario

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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
78-14099-04
Chapter 31      Configuring PFC QoS
Configuring PFC QoS
Configuring the Policy Map Class Trust State
To configure the policy map class trust state, perform this task: 
When configuring the policy map class trust state, note the following:
  •
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 (see 
the 
).
  •
With the dscp keyword, PFC QoS uses received DSCP.
  •
With the ip-precedence keyword, PFC QoS sets DSCP from received IP precedence (see the 
Configuring Policy Map Class Policing
When you configure policy map class policing, note the following:
  •
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 (see the 
These sections describe configuration of policy map class policing:
  •
  •
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 (see the 
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 internal DSCP 
value (see the 
).
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.