Srr-Queue Bandwidth Shape - Cisco Catalyst 3750 Command Reference Manual

srr-queue bandwidth shape

srr-queue bandwidth shape
Use the srr-queue bandwidth shape interface configuration command on the switch stack or on a
standalone switch to assign the shaped weights and to enable bandwidth shaping on the four egress
queues mapped to a port. Use the no form of this command to return to the default setting.
This command is not available on a 10-Gigabit Ethernet interface.
Syntax Description
weight1 weight2
weight3 weight4
Defaults Weight1 is set to 25. Weight2, weight3, and weight4 are set to 0, and these queues are in shared mode.
Command Modes Interface configuration
Command History Release
12.1(11)AX
Usage Guidelines
In shaped mode, the queues are guaranteed a percentage of the bandwidth, and they are rate-limited to
that amount. Shaped traffic does not use more than the allocated bandwidth even if the link is idle. Use
shaping to smooth bursty traffic or to provide a smoother output over time.
The shaped mode overrides the shared mode.
If you configure a shaped queue weight to 0 by using the srr-queue bandwidth shape interface
configuration command, this queue participates 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 for the same port for both shaping and sharing, make sure that you configure
the lowest numbered queue for shaping.
The egress queue default settings are suitable for most situations. You should change them only when
Note
you have a thorough understanding of the egress queues and if these settings do not meet your QoS
solution.
Catalyst 3750 Switch Command Reference
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srr-queue bandwidth shape weight1 weight2 weight3 weight4
no srr-queue bandwidth shape
Specify the weights to specify the percentage of the port that is shaped. The
inverse ratio (1/weight) specifies the shaping bandwidth for this queue.
Separate each value with a space. The range is 0 to 65535.
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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