Queue mode, Queue mode -220 – SMC Networks SMC Tiger 10/100 SMC6128L2 User Manual

Page 520

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queue mode

This command sets the queue mode to strict priority or Weighted
Round-Robin (WRR) for the class of service (CoS) priority queues. Use the
no form to restore the default value.

Syntax

queue mode {strict | wrr}
no queue mode

strict - Services the egress queues in sequential order, transmitting

all traffic in the higher priority queues before servicing lower

priority queues.

wrr - Weighted Round-Robin shares bandwidth at the egress ports

by using scheduling weights 1, 2, 4, 6, 8, 10, 12, 14 for queues 0 - 7

respectively.

Default Setting

Weighted Round Robin

Command Mode

Global Configuration

Command Usage

You can set the switch to service the queues based on a strict rule that
requires all traffic in a higher priority queue to be processed before
lower priority queues are serviced, or use Weighted Round-Robin
(WRR) queuing that specifies a relative weight of each queue. WRR
uses a predefined relative weight for each queue that determines the
percentage of service time the switch services each queue before
moving on to the next queue. This prevents the head-of-line blocking
that can occur with strict priority queuing.

show queue cos-map Shows the class-of-service map

PE

4-225

show interfaces
switchport

Displays the administrative and
operational status of an interface

PE

4-154

Table 4-61 Priority Commands (Layer 2) (Continued)

Command

Function

Mode Page

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