HP 5830 Series Configuration Manual page 46

Figure 15 WRR queuing
Packets to be sent through
this port
Assume a port provides eight output queues. WRR assigns each queue a weight value (represented by
w7, w6, w5, w4, w3, w2, w1, or w0) to decide the proportion of resources assigned to the queue.
The Switch Series supports byte-count weight (which determines the weight by the number of bytes
scheduled in a cycle).
On a 100 Mbps port, you can configure the weight values of WRR queuing to 5, 3, 1, 1, 5, 3, 1, and 1
(corresponding to w7, w6, w5, w4, w3, w2, w1, and w0, respectively). In this way, the queue with the
lowest priority can get a minimum of 5 Mbps of bandwidth. WRR avoids the disadvantage of SP queuing
that packets in low-priority queues may fail to be served for a long time.
Another advantage of WRR queuing is that when the queues are scheduled in turn, the service time for
each queue is not fixed. If a queue is empty, the next queue is scheduled immediately. This improves
bandwidth resource use efficiency.
WFQ queuing
Figure 16 WFQ queuing
WFQ is similar to WRR. You can use WFQ as an alternative to WRR.
Queue 0 Weight 1
Queue 1 Weight 2
......
Queue N-2 Weight N-1
Packet
classification
Queue N-1 Weight N
Sent packets
Queue Sending queue
scheduling
41
Interface