Operation Manual - QoS/ACL
Quidway S5000 Series Ethernet Switches Chapter 2 QoS configuration
2-4
The round robin scheduling ensures every queue gets some time of service of the
switch port. Take 8 egress queues for each port as example, WRR gives every queue a
same weight for resource obtaining. For example, you can configure RR algorithm for
100M port. Thus every queue can be guaranteed to get the minimum bandwidth of
12.5Mbps, avoiding the case in SP scheduling that the messages in the lower-priority
queues may not get any service for long time. Another advantage of RR queue is that
the service time is assigned to each queue flexibly, although it is the round multiple
queue scheduling. When a queue is empty, it will switch to the next queue immediately,
thereby making good used of the bandwidth resource.
3) WRR
The round scheduling ensures every queue gets some time of service of the switch port.
Take 8 egress queues for each port as example, WRR gives every queue a weight (w7,
w6, w5, w4, w3, w2, w1, and w0 respectively) for resource obtaining. For example, you
can configure the weight value of the WRR algorithm for 100M port as 50, 30, 10, 10,
50, 30, 10, 10 (corresponding to the w7, w6, w5, w4, w3, w2, w1, and w0 respectively).
Thus the low-priority queue can be guaranteed to get the minimum bandwidth of 5Mbps,
avoiding the case in SP scheduling that the messages in the lower-priority queues may
not get any service for long time. Another advantage of WRR queue is that the service
time is assigned to each queue flexibly, although it is the round multiple queue
scheduling. When a queue is empty, it will switch to the next queue immediately,
thereby making good used of the bandwidth resource.
2.1.9 Traffic Mirroring
The traffic mirroring function is carried out by copying the specified data packets to the
monitoring port for network diagnosis and troubleshooting.
2.1.10 Traffic Counting
With the flow-based traffic counting, you can request a traffic count to count and
analyze the packets.
2.2 QoS Configuratoin
QoS configuration tasks include:
z Set priority level
z Set packet filtering
z Set traffic limit
z Set line limit
z Set traffic redirection
z Set priority label
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