Avaya Configuring Traffic Filters and Protocol Prioritization Manual do Utilizador descarregar pdf (Página 43)

Using Circuit-level Protocol Prioritization

2-9

How you tune protocol prioritization depends on whether the bandwidth

allocation or strict dequeuing algorithm is active. To tune priority queueing with

the bandwidth allocation algorithm active, consider modifying

• Percent of Bandwidth

• Queue Depth

To improve strict dequeuing results for your protocol prioritization conﬁguration,

you can adjust

• Queue Depth

• Latency

Percent of Bandwidth

You can tune bandwidth allocation protocol prioritization by changing the default

allocation of bandwidth for each of the three priority queues. For example, if

statistics indicate that one interface requires more than 70% of bandwidth to

properly transmit high-priority trafﬁc, you can increase the High Queue Size

parameter and decrease the Normal or Low Queue Size. Remember that the

percent of bandwidth for the High Queue, Normal Queue, and Low Queue must

total 100 percent.

Queued trafﬁc with large packets often require more than the default bandwidth

allocation.

Queue Depth

Queue depth (or queue size) is the conﬁgurable number of packets that each

priority queue can hold. The default value for bandwidth allocation is 20 packets,

regardless of packet size.

Note: If statistics indicate that the High priority queue does not have enough

buffers, consider reducing the amount of high-priority trafﬁc. You should be

selective in assigning high-priority status. Too many trafﬁc types with high-

priority status could defeat the purpose of protocol prioritization. With the

strict dequeuing algorithm, too much high-priority trafﬁc could result in

clipping of normal- and low-priority trafﬁc.

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Avaya Configuring Traffic Filters and Protocol Prioritization Manual do Utilizador Página 43