Configure IP across your Frame Relay network, as displayed in Figure C-2:
You have to use static maps for each protocol. No dynamic mapping is permitted.
No subinterfaces are allowed on any router.
Use the most efficient subnetwork for IP addresses on the Frame cloud.
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 port type is DCE.
Do not use the keyword broadcast for the Frame Relay link between R6 and R7 when mapping IP.
Make sure you can also ping the local interface from each router configured for Frame Relay.