Question: What changes in behavior occur when specifying multipoint vs. poin-to-point on a sub interface in Frame Relay. The reason for my question is that I am reviewing someone else's config and I noticed that they are specifying multi-point on the subinterfaces instead of point-to-point as I would expect and I need to be able to explain why this might be a bad thing.
Thanks for the reply. I was looking for a little deeper understanding of the mechanics involved. In other words, what will happen if I build subinterfaces like I am doing traditional point-to-point (mapping each PVC to a separate sub-interface on a separate IP subnet), however I screw up and use the keyword multipoint instead of point-to-point. What do I break (if anything) by doing that?
On a point-to-point subinterface, one PVC will be assigned to the sub-interface, and all packets sent over that sub-interface will be mapped to that PVC. On a point-to-multipoint sub-interface, network address-to-DLCI mapping will be more of an issue, as the router must learn of the mappings via inverse arp or through frame-relay map statements in the configuration. The point-to-multipoint sub-interface will behave just as a physical serial interface with frame-relay encapsulation, with certain DLCIs assigned to the sub-interface.
Please note that when running OSPF over frame relay, all routers must have the same interface type as their neighbors.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...