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Queue Scheduling page
The switch supports eight queues for each interface. Queue number 8 is the highest priority
queue. Queue number 1 is the lowest priority queue. There are two ways of determining how
traffic in queues is handled, Strict Priority (SP) and Weighted Round Robin (WRR).
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Strict Priority (SP)—Egress traffic from the highest priority queue is transmitted first. Traffic
from the lower queues is processed only after the highest queue has been transmitted, which
provide the highest level of priority of traffic to the highest numbered queue.
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Weighted Round Robin (WRR)—In WRR mode the number of packets sent from the queue is
proportional to the weight of the queue (the higher the weight, the more frames are sent).
The queuing modes can be selected on the Queue page. When the queuing mode is by Strict
Priority, the priority sets the order in which queues are serviced, starting with Queue 8 (the
highest priority queue) and going to the next lower queue when each queue is completed.
When the queuing mode is Weighted Round Robin, queues are serviced until their quota has
been used up and then another queue is serviced. It is also possible to assign some of the
lower queues to WRR, while keeping some of the higher queues in Strict Priority. In this case
traffic for the SP queues is always sent before traffic from the WRR queues. After the SP
queues have been emptied, traffic from the WRR queues is forwarded. (The relative portion
from each WRR queue depends on its weight).