For each protocol to be passed across the Frame Relay connection, you must configure appropriate
addressing. This addressing must be planned in advance. For point-to-point connections, each individual
circuit should have its own subnetwork addressing and two available host addresses. For IP, each
subinterface is assigned a separate and unique IP subnet. For IPX, each subinterface must have a unique IPX
network number, and so on. As with any other addressing scheme, each side of the link must have a unique
host address. For point-to-multipoint connections, each subinterface also must have unique addressing.
However, a point-to-multipoint connection can connect to multiple remote sites. Thus, all sites sharing the
point-to-multipoint connection are members of the same subnetwork, no matter the number of connections
or the protocol. The cast type of the interface also dictates the manner in which DLCIs are assigned to the
Frame Relay interface.