Configure IP across your Frame Relay network, as displayed in Figure D-2.
■ You have to use static maps for each protocol. No dynamic mapping is permitted.
■ No subinterfaces are allowed on any router except on R3.
■ You can assign a subnet from your Class B range.
■ Use LMI-type Cisco only and do not rely on auto-sensing the LMI type on any routers. All router interface types are DTE. The Frame Relay port type is DCE.
■ Do not use the keyword broadcast for the Frame Relay link between R3 and R4 when mapping IP. (Hint: use a tunnel interface for routing IP across this cloud.)
■ Make sure that you can also ping the local interface from each router configured for Frame Relay.
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