Avaya Configuring DLSw Services Manual do Utilizador descarregar pdf (Página 70)

Configuring DLSw Services

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304233-A Rev. 00

DLSw Prioritization

Bay Networks routers enable you to prioritize DLSw traffic by configuring

priority queues for DLSw peers. You apply DLSw prioritization by using

outbound filters.

This section provides guidelines for implementing DLSw TCP-level

prioritization.

Protocol Prioritization Overview

Outbound traffic filters act on packets that the router sends on a synchronous

interface to a wide area network. Outbound traffic filter actions let you direct

traffic into delivery queues of varying precedence. Applying a priority queue

action to an outbound filter is called protocol prioritization. These outbound

filters are often called priority filters.

As a router operates, network traffic from a variety of sources converges at an

interface. Without protocol prioritization, the router transmits packets in a first in

first out (FIFO) order. Site Manager’s protocol prioritization features allow you to

instruct the router to use a different transmit order for specified ranges of packets

on an individual interface.

With protocol prioritization, the router sorts traffic into queues according to

priority filters that you configure. For most traffic, you configure priority filters on

an outbound interface. If a queue is full or you have configured an outbound drop

filter, the router discards (clips) the traffic. For DLSw traffic you can also create

priority queues for DLSw peers; the router cannot clip DLSw traffic.

The router holds the sorted packets in priority queues. It then uses a dequeuing

allocation algorithm to drain the queues and transmit traffic.

Priority queues do not affect traffic as it is entering the router, but rather affect the

sequence in which data leaves an interface. For this reason, protocol prioritization

is considered an outbound filter mechanism.

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Avaya Configuring DLSw Services Manual do Utilizador Página 70