Configuring The Egress Expedite Queue - Cisco Catalyst 2928 Software Configuration Manual

Configuring Standard QoS
Command
Step 4
show mls qos maps
Step 5
copy running-config startup-config
To return to the default CoS output queue threshold map, use the no mls qos srr-queue output cos-map
global configuration command.

Configuring the Egress Expedite Queue

You can ensure that certain packets have priority over all others by queuing them in the egress expedite
queue. SRR services this queue until it is empty before servicing the other queues.
Beginning in privileged EXEC mode, follow these steps to enable the egress expedite queue. This
procedure is optional.
Command
Step 1 configure terminal
Step 2 mls qos
Step 3 interface interface-id
Step 4
priority-queue out
Step 5
end
Step 6 show running-config
Step 7 copy running-config startup-config
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.
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# priority-queue out
Switch(config-if)# end
Catalyst 2928 Switch Software Configuration Guide
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Purpose
Verify your entries.
The CoS output queue threshold map shows the CoS value in the top row
and the corresponding queue ID and threshold ID in the second row; for
example, queue 2 and threshold 2 (2-2).
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enable QoS on a switch.
Specify the egress port, and enter interface configuration mode.
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.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Chapter 31 Configuring QoS
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