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Applying an Input Policy Map to an Interface
To apply an input policy map to an interface, use the following command.
You can apply the same policy map to multiple interfaces, and you can modify a policy map after you
apply it.
• You cannot apply an input Layer 2 QoS policy on an interface you also configure with the vlan-
stack access command.
• If you apply a service policy that contains an ACL to more than one interface, the system uses ACL
optimization to conserve CAM space. The ACL optimization behavior detects when an ACL exists in
the CAM rather than writing it to the CAM multiple times.
• Apply an input policy map to an interface.
INTERFACE mode
service-policy input
Specify the keyword layer2 if the policy map you are applying a Layer 2 policy map; in this case,
INTERFACE mode must be in Switchport mode.
Creating Output Policy Maps
1. Create an output policy map.
CONFIGURATION mode
policy-map-output
2. After you create an output policy map, do one or more of the following:
Applying an Output QoS Policy to a Queue
Specifying an Aggregate QoS Policy
Applying an Output Policy Map to an Interface
3. Apply the policy map to an interface.
Applying an Output QoS Policy to a Queue
To apply an output QoS policy to a queue, use the following command.
• Apply an output QoS policy to queues.
INTERFACE mode
service-queue
Specifying an Aggregate QoS Policy
To specify an aggregate QoS policy, use the following command.
• Specify an aggregate QoS policy.
POLICY-MAP-OUT mode
policy-aggregate
Quality of Service (QoS)
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