C
HAPTER
36
| Quality of Service Commands
– 832 –
To create a service policy for a specific category of ingress traffic, follow
these steps:
1. Use the class-map command to designate a class name for a specific
category of traffic, and enter the Class Map configuration mode.
2. Use the match command to select a specific type of traffic based on an
access list, a DSCP or IP Precedence value, or a VLAN.
3. Use the policy-map command to designate a policy name for a specific
manner in which ingress traffic will be handled, and enter the Policy
Map configuration mode.
4. Use the class command to identify the class map, and enter Policy Map
Class configuration mode. A policy map can contain up to 16 class
maps.
5. Use the set phb or set cos command to modify the per-hop behavior or
class of service for the matching traffic class, and use one of the police
commands to monitor parameters such as the average flow and burst
rate, and drop any traffic that exceeds the specified rate, or just reduce
the DSCP service level for traffic exceeding the specified rate.
6. Use the service-policy command to assign a policy map to a specific
interface.
N
OTE
:
Create a Class Map before creating a Policy Map.
class-map This command creates a class map used for matching packets to the
specified class, and enters Class Map configuration mode. Use the no form
to delete a class map.
SYNTAX
[no] class-map class-map-name [match-any]
class-map-name - Name of the class map. (Range: 1-16 characters)
match-any - Match any condition within a class map.
DEFAULT SETTING
None
COMMAND MODE
Global Configuration
COMMAND USAGE
â—† First enter this command to designate a class map and enter the Class
Map configuration mode. Then use match commands to specify the
criteria for ingress traffic that will be classified under this class map.
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