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Priority Commands
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queue cos-map
This command assigns class of service (CoS) values to the priority queues (i.e.,
hardware output queues 0 - 7). Use the no form set the CoS map to the default
values.
Syntax
queue cos-map queue_id [cos1 ... cosn]
no queue cos-map
• queue_id - The ID of the priority queue.
Ranges are 0 to 7, where 7 is the highest priority queue.
• 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.
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:
Related Commands
show queue cos-map (4-210)
Table 4-68 Default CoS Priority Levels
Queue
01234567
Priority
20134567
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:01234567
Priority Queue:01234567
Console#