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Cisco Frame Relay Config

In Cisco Frame Relay Configuration, on the Hub side, I have seen some examples where they configure point to point for each subinterface  to each spoke .some other examples where they configure one subinterface as a point to multi point to all spokes.
What s the difference?

For insnace , if I have one Hub connected to 3 spokes through a frame Relay, I will be able to configure either.
3 sub-interfaces on the hub each of them as point to point  to a certain spoke.
configure one sub-interface as point to multi point to all 3 spokes.

2 Solutions
Well one difference is if you use point to point sub interfaces. All the sub interfaces have to be on different subnets. Where as on point to multipoint the hub and spoke routers can all be on one subnet. Additionally, there are certain implications with OSPF network types based on how your frame relay topology is configured.
One other difference is that sub-interfaces give you interface up/down events that you can track. Not so with multipoint links. This is the main reason I prefer to use p2p sub-ifs
Additionally, the provider may not support anything other than p2p.
jskfanAuthor Commented:

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