Sharing(Bandwidth) - Cisco Catalyst 4500 Series Configuration Manual

Configuring QoS
Switch(config-pmap-c)# exit
Switch(config-pmap)# exit
Switch(config)# interface gigabitethernet1/1
Switch(config-if)# service-policy output policy1
Switch(config-if)# end
Switch#
Switch# show policy-map policy1
Policy Map policy1
This example shows how to configure class-level, average shape percentage to 32% of link bandwidth
for queuing-class traffic:
Switch# configure terminal
Switch(config)# policy-map queuing-policy
Switch(config-pmap)# class queuing-class
Switch(config-pmap-c)# shape average percent 32
Switch(config-pmap-c)# exit
Switch(config-pmap)# exit
Switch(config)# interface gigabitethernet1/1
Switch(config-if)# service-policy output queuing-policy1
Switch(config-if)# end
Switch #
Switch# show policy-map queuing-policy
Policy Map queuing-policy

Sharing(bandwidth)

The bandwidth assigned to a class of traffic is the minimum bandwidth that is guaranteed to the class
during congestion. Transmit Queue Sharing is the process by which output link bandwidth is shared
among multiple queues of a given port.
The supervisor engine supports a range of 32 kbps to 10 gbps for sharing, with a precision of
approximately +/- 0.75 per cent. The sum of configured bandwidth across all queuing classes should not
exceed the link bandwidth.
To configure class-level bandwidth action 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
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
40-26
Class class1
shape average 256000
Class queuing-class
Average Rate Traffic Shaping
cir 32%
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.
Chapter 40 Configuring Quality of Service
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