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Configuring QoS
Configuring QoS
Command
1.
configure terminal
2.
policy-map policy-map-name
3.
class {class-map-name | class-default}
4.
shape average target bps
5.
exit
6.
exit
7.
interface interface-id
8.
service-policy output policy-map-name
9.
end
10.
show policy-map [policy-map-name [class
class-map-name]]
11.
copy running-config startup-config
After you have created an output policy map, you attach it to an egress port. See
page
609.
Use the no form of the appropriate command to delete an existing policy map or class map or to delete a class-based
shaping configuration.
Configuring Output Policy Maps with Port Shaping
Port shaping is applied to all traffic leaving an interface. It uses a policy map with only class default when the maximum
bandwidth for the port is specified by using the shape average command. A child policy can be attached to the
class-default in a hierarchical policy map format to specify class-based actions for the queues on the shaped port.
The total of the minimum bandwidth guarantees (CIR) for each queue of the child policy cannot exceed the total port
shape rate.
Beginning in privileged EXEC mode, follow these steps to use port shaping to configure the maximum permitted average
rate for a class of traffic:
Command
1.
configure terminal
2.
policy-map policy-map-name
3.
class class-default
4.
shape average target bps
Purpose
Enter global configuration mode.
Create a policy map by entering the policy map name, and enter
policy-map configuration mode.
Enter a child class-map name or class-default to match all
unclassified packets, and enter policy-map class configuration
mode.
Specify the average class-based shaping rate.
For target bps, specify the average bit rate in bits per second. The
range is from 64000 to 1000000000.
Return to policy-map configuration mode.
Return to global configuration mode.
Enter interface configuration mode for the interface to which you
want to attach the policy.
Attach the policy map (created in Step 2) to the egress interface.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Attaching a Traffic Policy to an Interface,
Purpose
Enter global configuration mode.
Create a hierarchical policy map by entering the hierarchical
policy map name, and enter policy-map configuration mode for
the parent policy.
Enter a policy-map class configuration mode for the default class.
Specify the average class-based shaping rate.
For target bps, specify the average bit rate in bits per second. The
range is from 4000000 to 1000000000.
632
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