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Catalyst 3550 Multilayer Switch Command Reference
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
wrr-queue queue-limit
wrr-queue queue-limit
Use the wrr-queue queue-limit interface configuration command to configure the sizes of the egress
queues on Gigabit-capable Ethernet ports. Use the no form of this command to return to the default
setting.
wrr-queue queue-limit weight1 weight2 weight3 weight4
no wrr-queue queue-limit
Syntax Description
Defaults Weight1, weight2, weight3, and weight4 are 25 (1/4 of the buffer size is allocated to each queue).
Command Modes Interface configuration
Command History
Usage Guidelines The relative size differences in the numbers show the relative differences in the queue sizes.
On Gigabit-capable Ethernet ports, the total size of the queue can vary depending on the amount of RAM
in the switch.
When you enter this command, the queue is temporarily shut down during the hardware reconfiguration,
and the switch drops newly arrived packets to this queue.
Examples This example shows how to configure the buffer size ratio of the four queues. The ratio of the buffer
allocated for each queue is 1/10, 1/5, 3/10 and 2/5 to queue 1, 2, 3, and 4. (Queue 4 is four times larger
than queue 1, twice as large as queue 2, and 1.33 times as large as queue 3.)
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# wrr-queue queue-limit 1 2 3 4
You can verify your settings by entering the show mls qos interface buffers privileged EXEC command.
weight1 weight2
weight3 weight4
Ratio of weight1, weight2, weight3, and weight4 determines the ratio of the
sizes of the queues. Separate each value with a space. The weight range is 1
to 100.
Release Modification
12.1(4)EA1 This command was introduced.
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