Strict Priority Queueing - Avaya Cajun P882 User Manual

Chapter 21
Example

Strict Priority Queueing

21-36
Table 21-20. Default Weight Increments
Queue
WFQ 3
WFQ 4
WFQ 5
WFQ 6
WFQ 7
For information on how to set up WFQ, see
page 39.
Suppose that the accumulated weight of all queues is set at their
weight increments.
1. The switch services queue 7 because its accumulated weight is
128.
2. The accumulated weight of queue 7 is reset to 128, and the
accumulated weight of all other queues is increased by their
weight increment.
At this point, queue 7 and queue 6 both have an
accumulated weight of 128.
3. The switch services queue 7 because it is the higher priority
queue.
4. The accumulated weight of queue 7 is then reset to 128, and
the accumulated weight of all other queues is increased by
their weight increment.
Now queue 6 has an accumulated weight of 192, and queue
7 has an accumulated weight of 128.
5. The switch services queue 6 because it has the higher
accumulated weight.
With strict priority queuing, the switch services the eight queues in
order of their priority. The highest priority queue is serviced until it
is empty, and then the lower priority queues are serviced
sequentially until they are empty. For example, queue 7 must be
empty before the switch services queue 6. Queue 6 must be empty
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Weight Increment
8
16
32
64
128
"Setting Up WFQ"
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