Q: If I don't configure the PVC between R1-R6, surely it won't be used?
A: You have to make sure that the PVC is not used.
Q: But if it's not configured, surely it won't be used?
A: Use the command show frame relay pvc; if the PVC shows any input packets or output packets, you have not answered the question. You can also use the command show frame map.
Q: It says the routers must use subinterfaces. Can I use point-to-point everywhere?
A: This does not address the question.
Q: Can I use two separate point-to-point subinterfaces from R4 out to individual point-to-point subinterfaces on R1 and R6?
A: If the routers were not on a common subnet you could, but this is not the case.
Q: Can I put a point to multi-point interface on R4 and point-to-point interfaces on R1 and R6?
A: Yes.
Q: Do you want me to configure "broadcast" under my Frame Relay interfaces?
A: You need to determine what type of traffic/protocols will use the Frame Relay network.
