Cisco Systems 3560 Manual De Usuario

You can configure the egress queues for shaped or shared weights, or both. Use shaping to smooth bursty 
traffic or to provide a smoother output over time. For information about shaped weights, see the 

. For information about shared weights, see the 

Beginning in privileged EXEC mode, follow these steps to assign the shaped weights and to enable 
bandwidth shaping on the four egress queues mapped to a port. This procedure is optional.

To return to the default setting, use the no srr-queue bandwidth shape interface configuration 
command.

This example shows how to configure bandwidth shaping on queue 1. Because the weight ratios for 
queues 2, 3, and 4 are set to 0, these queues operate in shared mode. The bandwidth weight for queue 1 
is 1/8, which is 12.5 percent:

Switch(config)# interface gigabitethernet0/1

Switch(config-if)# srr-queue bandwidth shape 8 0 0 0

In shared mode, the queues share the bandwidth among them according to the configured weights. The 
bandwidth is guaranteed at this level but not limited to it. For example, if a queue empties and does not 
require a share of the link, the remaining queues can expand into the unused bandwidth and share it 
among them. With sharing, the ratio of the weights controls the frequency of dequeuing; the absolute 
values are meaningless. 

Enter global configuration mode.

interface interface-id

Specify the port of the outbound traffic, and enter interface configuration 
mode.

srr-queue bandwidth shape weight1 
weight2 weight3 weight4

Assign SRR weights to the egress queues.

By default, weight1 is set to 25; weight2, weight3, and weight4 are set to 0, 
and these queues are in shared mode.

For weight1 weight2 weight3 weight4, enter the weights to control the 
percentage of the port that is shaped. The inverse ratio (1/weight) controls 
the shaping bandwidth for this queue. Separate each value with a space. 
The range is 0 to 65535.

If you configure a weight of 0, the corresponding queue operates in shared 
mode. The weight specified with the srr-queue bandwidth shape 
command is ignored, and the weights specified with the srr-queue 
bandwidth share interface configuration command for a queue come into 
effect. When configuring queues in the same queue-set for both shaping 
and sharing, make sure that you configure the lowest number queue for 
shaping.

The shaped mode overrides the shared mode. 

Return to privileged EXEC mode.

show mls qos interface interface-id 
queueing

Verify your entries.

(Optional) Save your entries in the configuration file.