29-38
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-12
Chapter 29 Configuring QoS
Configuring Standard QoS
Configuring WRR Priority
Beginning in privileged EXEC mode, follow these steps to configure the WRR priority:
To disable the WRR scheduling and enable the strict priority scheduling, use the no wrr-queue
bandwidth global configuration command.
To enable one of the queues as the expedite queue and to enable the WRR scheduling for the remaining
queues, see the “Enabling the Expedite Queue and Configuring WRR Priority” section on page 29-38.
Enabling the Expedite Queue and Configuring WRR Priority
In Cisco IOS Release 12.1(12c)EA1 or later, beginning in privileged EXEC mode, follow these steps to
enable the expedite queue (queue 4) and assign WRR priority to the remaining queues:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
wrr-queue bandwidth
weight1...weight4
Assign WRR weights to the four CoS queues.
These are the ranges for the WRR values:
• For weight1, weight2, and weight3, the range is 1 to 255.
• For weight4, the range is 0 to 255. When weight4 is set to 0, queue
4 is configured as the expedite queue.
Note In software releases earlier than Cisco IOS
Release 12.1(12c)EA1, the ranges for all queues is 1 to 255.
Step 3
end Return to privileged EXEC mode.
Step 4
show wrr-queue bandwidth Display the WRR bandwidth allocation for the CoS priority queues.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
wrr-queue bandwidth weight1 weight2
weight3 0
Configure queue 4 as the expedite queue and assign WRR weights to the
remaining egress queues.
The range of WRR weights for weight1, weight2, and weight3 is 1 to 255.
Step 3
end Return to privileged EXEC mode.
Step 4
show wrr-queue bandwidth Display the WRR bandwidth allocation for the CoS priority queues.
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