WFQ

WFQ

How WFQ Works

WFQ is the default queue-servicing algorithm. When a port is set to use the WFQ algorithm, each queue:

Is assigned a weight increment. This value never changes.
Maintains an accumulated weight. After the switch services a queue, its accumulated weight is reset to the value of its weight increment, and the accumulated weight for the other queues is increased by their respective weight increments.

The switch always services the queue that has the highest accumulated weight. If two queues have the same accumulated weight, the switch first services the queue that has the highest priority (0 - 7).

Table�199 lists the default weight increment for each queue.

Table�199:�Default Weight Increments �
Queue	Weight Increment
WFQ 0	1
WFQ 1	2
WFQ 2	4
WFQ 3	8
WFQ 4	16
WFQ 5	32
WFQ 6	64
WFQ 7	128

For information on how to set up WFQ, see "Setting Up WFQ" later in this chapter.