Cisco WS-C3550-12G Software Configuration Manual page 497

Chapter 20 Configuring QoS
Mapping CoS Values to Select Egress Queues
Beginning in privileged EXEC mode, follow these steps to map CoS ingress values to select one of the
egress queues:
Command
Step 1
configure terminal
Step 2 mls qos
Step 3 interface interface-id
Step 4
wrr-queue cos-map queue-id cos1 ... cos8 Map assigned CoS values to select one of the egress queues.
Step 5
end
Step 6 show mls qos interface queueing
Step 7
copy running-config startup-config
To return the default CoS-to-egress-queue map, use the no wrr-queue cos-map [queue-id] interface
configuration command.
This example shows how to map CoS values 6 and 7 to queue 1, 4 and 5 to queue 2, 2 and 3 to queue 3,
0 and 1 to queue 4.
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# wrr-queue cos-map 1 6 7
Switch(config-if)# wrr-queue cos-map 2 4 5
Switch(config-if)# wrr-queue cos-map 3 2 3
Switch(config-if)# wrr-queue cos-map 4 0 1
78-11194-03
Purpose
Enter global configuration mode.
Enable QoS on the switch.
Enter interface configuration mode, and specify the egress
Gigabit-capable Ethernet interface.
The default map has these values:
CoS value 0, 1 selects queue 1.
CoS value 2, 3 selects queue 2.
CoS value 4, 5 selects queue 3.
CoS value 6, 7 selects queue 4.
For queue-id, specify the ID of the egress queue. The range is 1 to
•
4, where 4 can be configured as the expedite queue. For more
information, see the "Configuring the Egress Expedite Queue"
section on page 20-50.
• For cos1 ... cos8, specify the CoS values that select a queue. Enter
up to eight CoS values. Separate each value with a space. The
range is 0 to 7.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring QoS
20-45