Cisco Systems 3560 Manual De Usuario
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Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 34 Configuring QoS
Configuring Standard QoS
To disable the egress expedite queue, use the no priority-queue out interface configuration command.
This example shows how to enable the egress expedite queue when the SRR weights are configured. The
egress expedite queue overrides the configured SRR weights.
egress expedite queue overrides the configured SRR weights.
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# srr-queue bandwidth shape 25 0 0 0
Switch(config-if)# srr-queue bandwidth share 30 20 25 25
Switch(config-if)# priority-queue out
Switch(config-if)# end
Limiting the Bandwidth on an Egress Interface
You can limit the bandwidth on an egress port. For example, if a customer pays only for a small
percentage of a high-speed link, you can limit the bandwidth to that amount.
percentage of a high-speed link, you can limit the bandwidth to that amount.
Note
The egress queue default settings are suitable for most situations. You should change them only when
you have a thorough understanding of the egress queues and if these settings do not meet your QoS
solution.
you have a thorough understanding of the egress queues and if these settings do not meet your QoS
solution.
Beginning in privileged EXEC mode, follow these steps to limit the bandwidth on an egress port. This
procedure is optional.
procedure is optional.
To return to the default setting, use the no srr-queue bandwidth limit interface configuration
command.
command.
Step 4
priority-queue out
Enable the egress expedite queue, which is disabled by default.
When you configure this command, the SRR weight and queue size ratios
are affected because there is one less queue participating in SRR. This
means that weight1 in the srr-queue bandwidth shape or the srr-queue
bandwidth share command is ignored (not used in the ratio calculation).
are affected because there is one less queue participating in SRR. This
means that weight1 in the srr-queue bandwidth shape or the srr-queue
bandwidth share command is ignored (not used in the ratio calculation).
Step 5
end
Return to privileged EXEC mode.
Step 6
show running-config
Verify your entries.
Step 7
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface interface-id
Specify the port to be rate limited, and enter interface configuration mode.
Step 3
srr-queue bandwidth limit weight1
Specify the percentage of the port speed to which the port should be
limited. The range is 10 to 90.
limited. The range is 10 to 90.
By default, the port is not rate limited and is set to 100 percent.
Step 4
end
Return to privileged EXEC mode.
Step 5
show mls qos interface [interface-id]
queueing
queueing
Verify your entries.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.