Configuring Frame Relay

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Configuring Frame Relay

This section describes three Frame Relay scenarios:

Scenario 1: Multiple Destinations, Nonmeshed

Scenario 2: Partially Meshed Topology

Scenario 3: Fully Meshed Topology

To configure a second Frame Relay line for disaster recovery, see Using Enterprise OS Software.

These scenarios require your Frame Relay switch to support the Local Management Interface (LMI) Protocol. If your switch does not support LMI, see Using Enterprise OS Software for configuration procedures.

Obtain DLCIs for each remote site from the Frame Relay service provider. A DLCI identifies a circuit from the bridge/router to a destination. The destination uses a different DLCI for the circuit to the main site. Because a DLCI is known only by one end of the link, DLCIs may not be unique.

In the following example, the DLCI from site A to site C is @100. Coincidentally, the DLCI from site C to site A is also @100. Although the numbers are the same, there is no relationship between them. The DLCI from site A to site B is @90, but the DLCI from site B to site A is @80.

Site A

CSU/DSU

@100

@80

@90 Frame Relay

@100

CSU/DSUCSU/DSU

Site B

Site C

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3Com NETBuilder SI, SuperStack II manual Site B Site C, Configuring Frame Relay