CLI Reference Guide-R04

Table Of Contents

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23 Class of Service Commands

The commands described in this section allow you to specify which data packets

have greater precedence when traffic is buffered in the switch due to congestion.

This switch supports CoS with eight priority queues for each port. Data packets in a

port’s high-priority queue will be transmitted before those in the lower-priority

queues. The default priority can be set for each interface, also the queue service

mode and the mapping of frame priority tags to the switch's priority queues can be

configured.

Priority Commands (Layer 2)

This section describes commands used to configure Layer 2 traffic priority on the

switch.

Table 115: Priority Commands

Command Group Function

Priority Commands

(Layer 2)

Configures the queue mode, queue weights, and default priority for

untagged frames

Priority Commands

(Layer 3 and 4)

Sets the default priority processing method (CoS or DSCP), maps

priority tags for internal processing, maps values from internal priority

table to CoS values used in tagged egress packets for Layer 2 interfaces,

maps internal per hop behavior to hardware queues

Table 116: Priority Commands (Layer 2)

Command Function Mode

queue mode Sets the queue mode to Weighted Round-Robin (WRR),

strict priority, or a combination of strict and weighted

queuing

queue weight Assigns round-robin weights to the priority queues IC

switchport priority default Sets a port priority for incoming untagged frames IC

show interfaces switchport Displays the administrative and operational status of an

interface

show queue mode Shows the current queue mode PE

show queue weight Shows weights assigned to the weighted queues PE