Avaya Configuring Frame Relay Services Manual de usuario descargar pdf (Pagina 55)

Frame Relay Overview

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Figure 1-11. FECNs and BECNs in Big Pipe/Little Pipe Topology

You may need to modify the congestion counter and the congestion timer, from

the default values of 20 FECN or BECN counts per second to, for example, 10

counts per 5 seconds to account for the differences in traffic volume to and from

the central site.

X.213 Priority for SVCs

Some frame relay networks that support SVCs can prioritize SVC data and

connection characters by setting X.213 priority parameters. You configure values

for these parameters at the router, and the frame relay network uses them. For

instructions on configuring X.213 parameters see “Setting X.213 Priorities for

SVCs” on page 5-41.

Inactivity Timing for SVCs

The inactivity timer and inactivity timer mode features combine to automatically

disconnect an SVC according to values that you configure for amount of time and

the direction that data is flowing over the SVC. You can configure these

parameters to apply to all SVCs in a service record, and you can also configure

them for individual SVCs.

When the router establishes an SVC, the inactivity timer initializes two timers

internal to the router: one that monitors data the router transmits, and one that

monitors data the router receives. The inactivity timer mode defines how the

timers restart.

FR0015A

Remote site B

Remote site D

Remote site C

Flow of most traffic

Central site A

BECNs (few)

FECNs

(many)

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Avaya Configuring Frame Relay Services Manual de usuario Pagina 55