Cisco IOS in a Nutshell, 2nd Edition

Name

priority-list — global

Synopsis

priority-list number default level
no priority-list number default level

priority-list number protocol value level port-type port
no priority-list number protocol value level port-type port

priority-list number queue-limit high-limit medium-limit normal-limit low-limit
no priority-list number queue-limit

Configures

Priority lists for priority traffic queuing

Default

None

Description

The priority-list command is a set of three related commands that are used to construct a list. A priority list is a set of four queues, one for each of four priority levels: high, medium, normal, and low. Each queue has its own capacity (in packets); the queue sizes are set using priority-list queue-limit, although I recommend that you don’t modify the default queue sizes. The priority-list protocol version of the command assigns packets to a queue based on their protocols and, optionally, their ports. The priority-queue default command assigns a queue to all packets that aren’t explicitly assigned to a queue (i.e., all packets not associated with a protocol and port specified with the priority-list protocol command).

Once you have created a priority list, use the priority-group command to apply a priority list to an interface. The queues in the list are then used for all traffic going out the interface. The parameters for these commands are:

number

The number of the priority list you are configuring; it can be a value from 1 to 10.

protocol value

The protocol to prioritize. ...