3Com NETBuilder SI, Using Manual

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Configuring Frame Relay 93
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.
CSU/DSU
Frame
Relay
CSU/DSU
CSU/DSU
Site A
Site B
Site C
@90
@80
@100
@100