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Configuring Traffic Filters and Protocol Prioritization

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The router automatically queues frames that do not match a trafﬁc ﬁlter to the

Normal queue. After queuing packets, the router then drains the priority queues

and sends the trafﬁc to the transmit queue.

Generally, the router transmits higher priority trafﬁc ﬁrst. Other conﬁgured values

in the protocol prioritization scheme also affect the transmission of trafﬁc. Two

conﬁgurable values are queue depth and line delay, or latency, described in

“Tuning Protocol Prioritization.”

The Dequeuing Process

Circuit-level protocol prioritization uses one of two dequeuing algorithms to send

trafﬁc to the transmit queue: the bandwidth allocation algorithm or the strict

dequeuing algorithm.

Figure 2-1 illustrates the dequeuing process, with default conﬁguration values.

Figure 2-1. Protocol Prioritization Dequeuing

Transmit

queue

Physical

interface

High

priority

queue

Low

priority

queue

Dequeuing Algorithm

(Default algorithm = Bandwidth Allocation)

70% of bandwidth

20% of bandwidth

10% of bandwidth

(Default Latency

= 250 ms)

Normal

priority

queue

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Avaya Configuring Traffic Filters and Protocol Prioritization Bedienungsanleitung Seite 36