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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
wrr-queue bandwidth
wrr-queue bandwidth
Use the wrr-queue bandwidth global configuration command to assign weighted round-robin (WRR)
weights to the four class of service (CoS) priority queues. Use the no form of this command to disable
the WRR scheduler and enable the strict priority scheduler.
wrr-queue bandwidth weight1...weight4
no wrr-queue bandwidth
Syntax Description
Defaults WRR is disabled. The strict priority is the default scheduler.
Command Modes Global configuration
Command History
Usage Guidelines WRR allows bandwidth sharing at the egress port. This command defines the bandwidths for egress
WRR through scheduling weights.
You can configure queues 1, 2, and 3 for WRR scheduling and queue 4 for strict priority. To configure
queue 4 as the expedite queue, set weight4 to 0. When queue 4 is empty, packets from queues 1, 2, and 3
are sent according to the assigned WRR weights.
For more information about strict priority and WRR scheduling, see the “CoS and WRR” section in the
“Configuring QoS” chapter of the software configuration guide for this release.
Examples This example shows how to assign WRR weights of 10, 20, 30, and 40 to the CoS priority queues 1, 2,
3, and 4:
Switch(config)# wrr-queue bandwidth 10 20 30 40
This example shows how to disable the WRR scheduler and enable the strict priority scheduler:
Switch(config)# no wrr-queue bandwidth
This example shows how to configure queue 4 as the expedite queue and to assign WRR weights of 10,
20, and 30 to the queues 1, 2, and 3:
Switch(config)# wrr-queue bandwidth 10 20 30 0
You can verify your settings by entering the show wrr-queue bandwidth privileged EXEC command.
weight1...weight4 The ratio of weight1, weight2, weight3, and weight4 determines the
weights of the WRR scheduler. For weight1, weight2, and weight3, the
range is 1 to 255. The range for weight4 is 0 to 255.
Release Modification
12.0(5.2)WC(1) This command was introduced.
12.1(12c)EA1 The range for weight4 was modified from 1 to 255 to 0 to 255.
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