Accton Technology ES3528M-SFP manual Selecting the Queue Mode, 268

Class of Service Configuration 3

Web – Click Priority, Traffic Classes Status.

Figure 3-119 Enable Traffic Classes

Selecting the Queue Mode

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.

Command Attributes

•WRR - Weighted Round-Robin shares bandwidth at the egress ports by using scheduling weights 1, 2, 4, 8, for queues 0 through 3 respectively. (This is the default selection.)

•Strict - Services the egress queues in sequential order, transmitting all traffic in the higher priority queues before servicing lower priority queues.

Web – Click Priority, Queue Mode. Select Strict or WRR, then click Apply.

Figure 3-120 Queue Mode

CLI – The following sets the queue mode to strict priority service mode.

Console(config)#queue mode wrr	4-265
Console(config)#exit
Console#show queue mode	4-268
Queue mode: wrr
Console#

Setting the Service Weight for Traffic Classes

This switch uses the Weighted Round Robin (WRR) algorithm to determine the frequency at which it services each priority queue. As described in “Mapping CoS

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