42-74
Cisco7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter42 Con figuring PFC QoS
Configuring PFCQoS
Creating a Policy Map Class and Configuring Filtering
To create a policy map class and configure it to filter with a class map, perform this task:
Configuring Policy Map Class Actions
When configuring policy map class actions, note the following information:
•Policy maps can contain one or more policy map classes.
•Put all trust-state and policing commands for each type of traffic in the same policy map class.
•PFC QoS only applies commands from one policy map class to traffic. After traffic has matched the
filtering in one policy map class, QoS does apply the filtering configured in other policy map
classes.
•For hardware-switched traffic, PFCQoS does not support the bandwidth, priority, queue-limit, or
random-detect policy map class commands. You can configure these commands because they can
be used for software-switched traffic.
•PFC QoS does not support the set qos-group policy map class commands.
•PFC QoS supports the set ip dscp and set ip precedence policy map class commands for IPv4
traffic.
–
In Release 12.2(18)SXD and later releases and in Release 12.2(17d)SXB and later releases, you
can use the set ip dscp and set ip precedence commands on non-IP traffic to mark the internal
DSCP value, which is the basis of the egress Layer 2 CoS value.
–
In Release 12.2(18)SXE and later releases, the set ip dscp and set ip precedence commands
are saved in the configuration file as set dscp and set precedence commands.
•In Release 12.2(18)SXE and later releases, PFC QoS supports the set dscp and set precedence
policy map class commands for IPv4 and IPv6 traffic.
•You cannot do all three of the following in a policy map class:
–
Mark traffic with the set commands
–
Configure the trust state
–
Configure policing
In a policy map class, you can either mark traffic with the set commands or do one or both of the
following:
–
Configure the trust state
–
Configure policing
Note When configure policing, you can mark traffic with policing keywords.
Command Purpose
Router(config-pmap)# class class_name Creates a policy map class and configures it to filter with a
class map.
Note PFC QoS supports class maps that contain a single
match command.
Router(config-pmap)# no class class_name Clears use of the class map.