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Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• CoS values assigned at the ingress port are also used at the egress port.
• This command sets the CoS priority for all interfaces.
Example
The following example shows how to change the CoS assignments to a one-to-one
mapping:
Console(config)#interface ethernet 1/1
Console(config-if)#queue cos-map 0 0
Console(config-if)#queue cos-map 1 1
Console(config-if)#queue cos-map 2 2
Console(config-if)#exit
Console#show queue cos-map ethernet 1/1
Information of Eth 1/1
Traffic Class : 0 1 2 3 4 5 6 7
Priority Queue: 0 1 2 3 4 5 6 7
Console#
Related Commands
show queue cos-map (35-6)
show queue mode
This command shows the current queue mode.
Command Mode
Privileged Exec
Example
Console#show queue mode
Queue Mode: wrr
Console#
35-5
• cos1 ... cosn - The CoS values that are mapped to the queue ID. It is a
space-separated list of numbers. The CoS value is a number from 0 to 7,
where 7 is the highest priority.
Default Setting
This switch supports Class of Service by using eight priority queues, with
Weighted Round Robin queuing for each port. Eight separate traffic classes
are defined in IEEE 802.1p. The default priority levels are assigned according
to recommendations in the IEEE 802.1p standard as shown below.
Table 35-3 Default CoS Priority Levels
0 1 2 3 4 5 6 7
2 0 1 3 4 5 6 7
Priority
Queue
Priority Commands (Layer 2)
35