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Configuring QoS
Configuration Examples for Policy Maps
This example configures classes for output service policies with three classes of service: gold, silver, and bronze. The
gold class is configured to match the marked value in the input service policy. Because a match-all classification (the
default) can have only single classification criterion, the match-any classification is used so that you can add
classification criteria in the future.
Switch# config terminal
Switch(config)# class-map match-any gold-out
Switch(config-cmap)# match ip dscp af43
Switch(config-cmap)# exit
Switch(config)# class-map match-any silver-out
Switch(config-cmap)# match ip dscp af21
Switch(config-cmap)# exit
Switch(config)# class-map match-any bronze-out
Switch(config-cmap)# match ip dscp af31
Switch(config-cmap)# exit
This example configures one output service policy to be applied to both Gigabit Ethernet NNIs, providing priority with
rate-limiting to the gold class, class-based shaping for the silver class, and a minimum bandwidth guarantee of 10
percent to the bronze class.
Switch(config)# policy-map output-g1-2
Switch(config-pmap)# class gold-out
Switch(config-pmap-c)# priority
Switch(config-pmap-c)# police 50000000
Switch(config-pmap-c)# exit
Switch(config-pmap)# class silver-out
Switch(config-pmap-c)# shape average 200000
Switch(config-pmap-c)# exit
Switch(config-pmap)# class bronze-out
Switch(config-pmap-c)# bandwidth percent 10
Switch(config-pmap-c)# exit
This example attaches the input and output service policies to the Gigabit Ethernet ports and activates them.
Switch(config)# interface range GigabitEthernet1/17-18
Switch(config-if-range)# service-policy input input-all
Switch(config-if-range)# service-policy output output-g1-2
Switch(config-if-range)# no shutdown
Switch(config-if-range)# exit
QoS Configuration for Customer B
This section provides examples for configuring and activating QoS policies on the switch for a new set of customers
without affecting the current customers. Input and output QoS service policies are configured based on the requirements
and attached to relevant ports. The example uses an existing input policy-map and configures a new output policy map
for the new customers.
In the initial configuration for Customer B, Gigabit Ethernet ports 1 and 2 are NNIs and are enabled by default.
This is the overall sequence of initial configuration:
Define any new required output policies.
Attach input and output policies to ports to be activated.
Take the ports out of the shut-down state.
Note these restrictions when configuring output policies:
You can define up to three classes in the output policy map.
The defined classes must be the same as other output policy maps.
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