Classifying, Policing, And Marking Traffic On Physical Ports By Using Policy Maps - Cisco IE 3000 Software Configuration Manual
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Configuring Standard QoS
Classifying, Policing, and Marking Traffic on Physical Ports by Using Policy Maps
You can configure a policy map on a physical port that specifies which traffic class to act on. Actions
can include trusting the CoS, DSCP, or IP precedence values in the traffic class; setting a specific DSCP
or IP precedence value in the traffic class; and specifying the traffic bandwidth limitations for each
matched traffic class (policer) and the action to take when the traffic is out of profile (marking).
A policy map also has these characteristics:
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Follow these guidelines when configuring policy maps on physical ports:
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Beginning in privileged EXEC mode, follow these steps to create a policy map:
Command
Step 1
configure terminal
Step 2
class-map [match-all | match-any]
class-map-name
Cisco IE 3000 Switch Software Configuration Guide
32-44
A policy map can contain multiple class statements, each with different match criteria and policers.
A separate policy-map class can exist for each type of traffic received through a port.
A policy-map trust state and a port trust state are mutually exclusive, and whichever is configured
last takes affect.
You can attach only one policy map per ingress port.
If you configure the IP-precedence-to-DSCP map by using the mls qos map ip-prec-dscp
dscp1...dscp8 global configuration command, the settings only affect packets on ingress interfaces
that are configured to trust the IP precedence value. In a policy map, if you set the packet IP
precedence value to a new value by using the set ip precedence new-precedence policy-map class
configuration command, the egress DSCP value is not affected by the IP-precedence-to-DSCP map.
If you want the egress DSCP value to be different than the ingress value, use the set dscp new-dscp
policy-map class configuration command.
If you enter or have used the set ip dscp command, the switch changes this command to set dscp in
its configuration.
D You can use the set ip precedence or the set precedence policy-map class configuration
command to change the packet IP precedence value. This setting appears as set ip precedence in
the switch configuration.
A policy-map and a port trust state can both run on a physical interface. The policy-map is applied
before the port trust state.
Purpose
Enter global configuration mode.
Create a class map, and enter class-map configuration mode.
By default, no class maps are defined.
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(Optional) Use the match-all keyword to perform a logical-AND
of all matching statements under this class map. All match criteria
in the class map must be matched.
(Optional) Use the match-any keyword to perform a logical-OR of
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all matching statements under this class map. One or more match
criteria must be matched.
For class-map-name, specify the name of the class map.
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If neither the match-all or match-any keyword is specified, the default
is match-all.
Because only one match command per class map is supported,
Note
the match-all and match-any keywords function the same.
Chapter 32
Configuring QoS
OL-13018-01
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