Specifications

27-35
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 27 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 27-35.
Enabling the Expedite Queue and Configuring WRR Priority
In 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 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.