HP A6600 Configuration Manual page 54

CQ
Figure 17 CQ
Packets to be sent
through this interface
CQ provides 17 queues, numbered from 0 to 16. Queue 0 is a reserved system queue, and queues 1 through
16 are customer queues, as shown in
interface/PVC bandwidth for each customer queue. By default, packets are assigned to queue 1.
During a cycle of queue scheduling, CQ first empties the system queue. Then, it schedules the 16 queues in
a round robin way: it sends a certain number of packets (based on the percentage of interface bandwidth
assigned for each queue) out of each queue in the ascending order of queue 1 to queue 16. CQ guarantees
normal packets a certain amount of bandwidth, and ensures mission-critical packets are assigned more
bandwidth.
CQ can assign free bandwidth of idle queues to busy queues. Even though it performs round robin queue
scheduling, CQ does not assign fixed time slots for the queues. If a queue is empty, CQ immediately moves
to the next queue. When a class does not have packets, the bandwidth for other classes increases.
Queue 0
Queue 1
Queue 2
......
Queue 15
Classify
Queue 16
Figure
Priority
queue
10%
Packets sent
30%
Schedule Sending queue
10%
5%
17. Define traffic classification rules and assign a percentage of
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Interface