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12.1.2 Queue Scheduling
Click
QoS
>
General
>
Queue Scheduling
To display Queue Scheduling web 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)
.
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.
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 mode 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 has been emptied,
traffic from the WRR queues is forwarded. (The relative portion from each WRR queue depends on
its weight).
