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Configuring Traffic Filters and Protocol Prioritization

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Bandwidth Allocation Algorithm

The bandwidth allocation algorithm uses a configurable percentage of bandwidth

for each of the three priority queues to determine how to transmit queued traffic.

The default configuration is as follows:

• High queue -- 70% of bandwidth

• Normal queue -- 20% of bandwidth

• Low queue -- 10% of bandwidth

When the amount of traffic transmitted from a particular queue reaches the

configured percentage, the next-higher-priority queue begins to transmit traffic.

The amount of actual data transmitted depends on the clock speed of the circuit.

You can configure the clock speed on a synchronous interface by setting the

External Clock Speed parameter in the Configuration Manager Edit Sync

Parameters window. (See Configuring WAN Line Services.)

The bandwidth allocation algorithm works as follows:

The transmit queue scans the High queue.

If there is no traffic in the High queue, the algorithm proceeds to step 3

The router empties all packets from the High queue, up to the configured

bandwidth percentage, into the transmit queue and then transmits the packets.

The default bandwidth percentage for the High queue is 70 percent. If the

actual bandwidth use is less than the limit, the router empties the High queue

and proceeds to the Normal queue.

The transmit queue scans the Normal queue.

If there is no traffic in the Normal queue, the algorithm proceeds to step 5

The router empties all packets from the Normal queue, up to the configured

bandwidth percentage, into the transmit queue and then transmits the packets.

The default bandwidth percentage for the Normal queue is 20 percent. If the

actual bandwidth use is less than the limit, the router empties the Normal

queue and proceeds to the Low queue.

The transmit queue scans the Low queue.

If there is no traffic in the Low queue, the algorithm returns to step 1

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Avaya Configuring Traffic Filters and Protocol Prioritization Bedienungsanleitung Seite 38