Avaya Configuring Frame Relay Services Manual de usuario descargar pdf (Pagina 37)

Implementation Notes

2-13

If you enable the congestion control feature, you can specify the number of

FECN/BECN bits the router receives in a given time period before it stops

transmitting frames. While frames are going across the network, the Frame Relay

interface checks received packets for FECN and BECN bits set to 1. If the

interface receives the speciﬁed number of bits during the designated time period,

Frame Relay drops all trafﬁc destined for the PVC where there is congestion.

When the interface no longer receives these congestion notiﬁcations, the router

resumes transmission.

For example, suppose you set the congestion timer to 0.5 seconds and the

congestion count to 3. In this case, if an interface receives 3 FECNs or BECNs

within 0.5 seconds, the node stops sending frames (although it continues to

receive frames for this PVC). If the interface receives no FECNs or BECNs during

the next 0.5 seconds, the router resumes transmission. Refer to Chapter 4 for

instructions on conﬁguring the congestion parameters.

Conﬁguring Synchronous Lines for Frame Relay

If you enable Frame Relay on a circuit, Site Manager automatically sets the

following synchronous line parameters (Table 2-2):

For more information on these parameters, refer to Conﬁguring Routers or

Conﬁguring Customer Access and Trunks (BNX Software), depending on the type

of installed software.

Table 2-2. Synchronous Line Parameters for Frame Relay

Parameter Value

BOFL Disable

Promiscuous Enable

Service Transparent

WAN Protocol Frame Relay

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 83 84

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Avaya Configuring Frame Relay Services Manual de usuario Pagina 37