C
HAPTER
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| Quality of Service Commands
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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, an IPv4 DSCP value, IPv4 Precedence value, IPv6 DSCP
value, a VLAN, a CoS value, or a source port.
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, set cos, or set ip dscp command to modify the per-hop
behavior, the class of service value in the VLAN tag, or the priority bits
in the IP header (IP DSCP value) 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-all | match-any]
class-map-name - Name of the class map. (Range: 1-32 characters)
match-any - Match any condition within a class map.
match-any - Match any condition within a class map.
DEFAULT SETTING
None
COMMAND MODE
Global Configuration
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