In this case,
each pair of the point-to-point routers is on its own subnet, and each point-to-point
subinterface has a single DLCI. In a point-to-point environment, because each
subinterface acts like a point-to-point interface, update traf?¬?c is not subject to the split
horizon rule.
?– Multipoint: A single multipoint subinterface is used to establish multiple PVC
connections to multiple physical interfaces or subinterfaces on remote routers. In this
case, all the participating interfaces are in the same subnet. In this environment,
because the subinterface acts like a regular NBMA Frame Relay interface, update
traf?¬?c is subject to the split horizon rule.
Example: Configuring Frame Relay Point-to-Point Subinterfaces
In Figure 8-29, Router A has two point-to-point subinterfaces. The s0.110 subinterface
connects to Router B, and the s0.120 subinterface connects to Router C. Each subinterface
is on a different subnet.
Table 8-2 frame-relay map Command Parameters
Parameter Description
protocol De?¬?nes the supported protocol, bridging, or logical link control. The
choices include AppleTalk, DECnet, Data-Link Switching (DLSW),
IP, IPX, Logical Link Control, type 2 (LLC2), remote source-route
bridging (RSRB), Banyan VINES, and XNS.
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