Modifying Output Policies And Adding Or Deleting Configured Actions - Cisco IE-4000 Software Configuration Manual

Configuring QoS
Configuration Examples for Policy Maps
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Each class configuration must be based on the classification or marking done in the input policy-map.

Modifying Output Policies and Adding or Deleting Configured Actions

This section provides examples of updating an existing set of output policy maps to add or delete queuing and
scheduling actions. The modification in the output policy map might be required due to a change in the service
provisioning requirements. You can make the change without shutting down ports that are not configured with the output
policy map to be modified. But you must shut down the ports that are configured with that output policy map. Customers
not using this output policy map are not affected.
In the initial configuration, Gigabit Ethernet ports 1 and 2 are NNIs and are enabled by default.
This is the overall sequence of configuration:
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Shut down all active ports carrying the policy to be modified.
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Detach the output policy from all ports to which it is attached.
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Make modifications to the output policy.
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Reattach the output policy to the appropriate ports.
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Take the ports out of the shutdown state.
Note these restrictions for configuring output policies:

You can define up to three classes in the output policy map.
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The defined classes must be the same as other output policy maps.
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The number of defined classes in each output policy map must be same.
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You must assign an action to each class; that is, there can be no empty class.
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Each class configuration must be based on the classification/marking done in the input policy-map.
These steps shut down all ports carrying the output policy, in this case only the Gigabit Ethernet ports.
Switch(config)# interface range GigabitEthernet1/17-18
Switch(config-if-range)# shutdown
Switch(config-if-range)# exit
These steps detach the output policy to be modified, in this case the one configured on the Gigabit Ethernet ports:
Switch(config)# interface range GigabitEthernet1/17-18
Switch(config-if-range)# no service-policy output output-g1-2
Switch(config-if-range)# exit
These steps modify the output service policy servicing the Gigabit Ethernet NNIs. Instead of providing a minimum
bandwidth guarantee of 10 percent to the bronze class, the policy is modified to provide class-based shaping to 100000
bps.
Switch(config)# policy-map output-g1-2
Switch(config-pmap)# class bronze-out
Switch(config-pmap-c)# no bandwidth percent 10
Switch(config-pmap-c)# shape average 100000
Switch(config-pmap-c)# exit
These steps reattach the output policy to the Gigabit Ethernet ports:
Switch(config)# interface range GigabitEthernet1/17-18
Switch(config-if-range)# service-policy output output9-12
Switch(config-if-range)# exit
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