3Com 3CRDSF9PWR To configure the queue mode, Click Device QoS Queue. The Queue Setup Page opens

172CHAPTER 13: CONFIGURING QUALITY OF SERVICE

Defining the Queue The Queue Setup Page is used to set the queue mode to strict priority or Mode Weighted Round-Robin (WRR) for the CoS priority queues.

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 the relative weight of each queue. WRR uses a predefined relative weight for each queue that determines the percentage of 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.

Monitor users have no access to this page.

To configure the queue mode:

1Click Device > QoS > Queue. The Queue Setup Page opens:

Figure 89 Queue Setup Page

The Queue Setup Page contains the following fields:

■Strict Priority — 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, 10, 15 for queues 0 - 3 respectively.

2Select the queue mode.

3Click . The queue mode is configured on the device, and the device is updated.