Avaya Configuring Dial Services Manual de usuario descargar pdf (Pagina 39)

Dial Services Overview

117353-B Rev. 00

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The frame relay switch does not activate PVCs and configured DLCIs until the

router receives data from the demand circuit and exchanges Data Link Control

Management Interface (DLCMI) status messages with the switch. For more

information about frame relay, see Configuring Frame Relay Services.

Terminating Demand Circuits

The router deactivates the demand circuit when

• You enable the Force Take Down parameter.

To deactivate a force dial connection, you configure the Force Take Down

parameter, which instructs the router to clear the connection. To learn how to

configure this parameter, refer to Chapter 10.

• You schedule the circuit to come down.

Using the Schedule option, you can schedule the circuit’s availability for a

specific day and time. The schedule parameters are part of the circuit’s

configuration (refer to Chapter 10). The Schedule option also allows you to

configure whether the router uses the Inactivity Time parameter to

dynamically deactivate the connection.

• The inactivity time expires.

To deactivate the connection, you can configure the Inactivity Time

parameter, which dynamically terminates the connection after a specified

amount of time elapses without data activity. If there is data going across the

line, the inactivity time resets and the connection remains active.

To ensure that a connection is not up longer than necessary, you can configure

traffic filters that allow specific types of data to go across a line without

resetting the inactivity time.

For PPP connections, the router does not consider Link Quality Report

(LQR), Link Control Protocol (LCP), and periodic CHAP messages as data,

so these messages do not reset the inactivity timer.

For frame relay circuits, DLCMI messages and other signaling packets are not

treated as data, so they do not reset the inactivity timer. The router usually

terminates frame relay demand connections, not the frame relay network.

• The frame relay DLCMI fails.

If the DLCMI messages cannot be exchanged across the frame relay demand

circuit, the router deactivates the circuit.

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Avaya Configuring Dial Services Manual de usuario Pagina 39