Avaya Configuring Traffic Filters and Protocol Prioritization Manual de usuario descargar pdf (Pagina 40)

Configuring Traffic Filters and Protocol Prioritization

2-6

Strict Dequeuing Algorithm

Protocol prioritization can also use the strict dequeuing algorithm to send trafﬁc to

the transmit queue. This algorithm works as follows:

1. The transmit queue scans the high-priority queue.

If there is no trafﬁc in the high-priority queue, the algorithm proceeds to

Step 4.

2. The router empties all packets from the high-priority queue into the

transmit queue, up to the latency value or the maximum transmit queue

size, and then transmits them.

The transmit queue size is the maximum number of packets in the transmit

queue at one time. You cannot conﬁgure this number using Site Manager.

3. If the latency value is reached, the transmit queue starts again, scanning

and emptying trafﬁc from the high-priority queue.

If neither latency nor the maximum transmit queue size is reached, the

algorithm proceeds to Step 4.

4. The transmit queue scans the normal-priority queue.

If there is no trafﬁc in the normal-priority queue, the algorithm proceeds to

Step 7.

5. The router empties all packets from the normal-priority queue, up to the

latency value, into the transmit queue and then transmits them.

6. If latency is reached, the transmit queue starts again at Step 1, scanning

and emptying trafﬁc from the high-priority queue.

If latency is not reached, the algorithm proceeds to Step 7.

7. The transmit queue scans the low-priority queue.

If there is no trafﬁc in the low-priority queue, the algorithm starts again at

Step 1.

8. The router empties all packets from the low-priority queue, up to the

latency value, into the transmit queue and then transmits them.

9. The algorithm starts again at Step 1, whether or not latency is reached.

Figure 2-3 illustrates the strict dequeuing algorithm.

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Avaya Configuring Traffic Filters and Protocol Prioritization Manual de usuario Pagina 40