101
Advanced Settings
WRR-Mode: Weight Round Robin Mode. In this mode, packets in all the queues are sent
in order based on the weight value for each queue and every queue can be assured of a
certain service time. Assuming there are 4 egress queues on the port. The four weight
values (namely, w4, w3, w2, and w1) indicate the proportion of resources assigned to the
four queues respectively. On a 100M port, if you set the weight values of WRR
queue-scheduling algorithm to 25, 15, 5 and 5(correspond to w4, w3, w2, and w1
respectively). Then the queue with the lowest priority can be ensured of, at least, 10 Mbps
bandwidth, thus WRR queue overcomes the disadvantage of SP queue that the packets
in the queues with lower priority cannot get service for a long time. In WRR mode, though
the queues are scheduled in order, the service time for each queue is not fixed, that is to
say, if a queue is empty, the next queue will be scheduled. In this way, the bandwidth
resources are made full use of.
1.1 Scheduling Scheme
On this page you can select a schedule mode for the switch. When congestion occurs on
the network, the problem that many packets compete for resources must be solved,
usually in the way of queue scheduling.
Click
QoS > QoS Configuration > Scheduling Scheme
to enter page below:
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