172 CHAPTER 13: CONFIGURING QUALITY OF SERVICE
Defining the Queue
Mode
The Queue Setup Page is used to set the queue mode to strict priority or
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:
1 Click 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.
2 Select the queue mode.
3 Click . The queue mode is configured on the device, and the
device is updated.
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