Cisco Catalyst 4500 Series Configuration Manual page 889

Chapter 40 Configuring Quality of Service
When a queuing class is configured without any explicit shape configuration, the queue shape is set to
the link rate.
To configure class-level shaping in a service policy, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(config)# policy-map
policy-map-name
Step 3
Switch(config-pmap)# class class-name
Step 4
Switch(config-pmap-class)# shape
average {cir-bps [optional_postfix] |
percent percent}
Step 5
Switch(config-pmap-class)# exit
Step 6
Switch(config-pmap)# exit
Step 7
Switch(config)# interface interface-id
Step 8
Switch(config-interface)#
service-policy output policy-map-name
Step 9
Switch(config-interface)# end
Step 10
Switch# show policy-map
[policy-map-name [class
class-map-name]]
or
Switch# show policy-map interface
interface-id
Step 11
Switch# copy running-config
startup-config
To delete an existing policy map, use the no policy-map policy-map-name global configuration
command. To delete an existing class, use the no class class-name policy-map configuration command.
To disable the average-rate traffic shaping, use the no shape average policy-map class configuration
command.
This example shows how to configure class-level, average-rate shaping. It limits traffic class class1 to a
data transmission rate of 256 kbps:
Switch# configure terminal
Switch(config)# policy-map policy1
Switch(config-pmap)# class class1
Switch(config-pmap-c)# shape average 256000
OL-25340-01
Purpose
Enters global configuration mode.
Creates a policy map by entering the policy-map name, and enter
policy-map configuration mode.
By default, no policy maps are defined.
Specifies the name of the class whose traffic policy you want to
create or change, and enter policy-map class configuration mode.
By default, no traffic classes are defined.
Enables average-rate traffic shaping.
You can specify the shaping rate in absolute value or as a percentage:
For cir-bps [optional_postfix], specify the shaping rate in bps.
•
Range is 32000 to 10000000000 bps. Supply an optional postfix
(K, M, G).
For percent, specify the percentage of link rate to shape the class
•
of traffic. The range is 1 to 100.
By default, average-rate traffic shaping is disabled.
Returns to policy-map configuration mode.
Returns to global configuration mode.
Specifies a physical port and enter interface configuration mode.
Specifies the policy-map name, and apply it a physical interface.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Configuring QoS
40-25