The command to con?¬?gure the local DLCI on the
subinterface follows:
RouterX(config-subif)# ffrraammee--rreellaayy iinntteerrffaaccee--ddllccii dlci-number
The dlci-number parameter de?¬?nes the local DLCI number that is being linked to
the subinterface. No other methods exist to link an LMI-derived DLCI to a
subinterface because the LMI does not know about subinterfaces.
Do not use the frame-relay interface-dlci command on physical interfaces.
Example: Configuring Frame Relay Multipoint Subinterfaces
In Figure 8-30, all the routers are on the 10.17.0.0/24 subnet. Router A is con?¬?gured with
a multipoint subinterface with three PVCs. The PVC with DLCI 120 is used to connect to
Router B, the PVC with DLCI 130 is used to connect to Router C, and the PVC with DLCI
140 is used to connect to Router D.
Figure 8-30 Frame Relay Multipoint Subinterface
Split horizon is disabled by default on Frame Relay multipoint main interfaces and enabled
by default on Frame Relay multipoint subinterfaces. In the ?¬?gure, which uses a multipoint
NOTE If you de?¬?ned a subinterface for point-to-point communication, you cannot
reassign the same subinterface number to use for multipoint communication without ?¬?rst
rebooting the router.
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