Alvaro, The transitive connectivity is at l2 level though :-)
I will emphasize that fact that the premise is a broadcast network. Thanks. Jeffrey > -----Original Message----- > From: Alvaro Retana (aretana) [mailto:[email protected]] > Sent: Monday, December 20, 2010 3:45 PM > To: Jeffrey (Zhaohui) Zhang > Cc: [email protected] > Subject: RE: [OSPF] OSPF Hybrid Broadcast and P2MP Interface Type > > > From: Jeffrey (Zhaohui) Zhang [mailto:[email protected]] > > Sent: Monday, December 20, 2010 3:18 PM > > > Jeffrey: > > > ... > > > It is very tempting to use the model that you describe, but radio > > > networks can be "flimsy" because of interference, signal fading, > > > movement, etc.. The broadcast model for neighbor > > > discovery/maintenance can quickly become unusable for nodes that > > > loose connectivity to the DR. > > > > > > It is very easy to see how the same L2 media may provide > nodes that > > > don't have the same view of the other nodes (not everyone > is within > > > radio range of everyone else, for example). > > > > There are real-life examples where a radio network is built to > > guarantee that if a node can reach a central node then it can reach > > others who can also reach the central node (e.g., a satellite > network). > > That's transitive connectivity (nodes can reach each other through the > satellite), not direct connectivity (a node sends a broadcast > and others > receive it w/out any other node in the middle). > > ...but that could be a completely separate discussion. ;-) > > > ... > > The premise is that we have a broadcast network but one can > reach some > > stations with a metric that is different from when reaching others. > > > > If that premise is not satisfied, then it's a different > topic (and out > > of the scope). > > You should specifically mention the limitations of the solution in the > draft to avoid generalizations...like the one I made when you > suggested > "radio networks". > > Happy Holidays!! > > Alvaro. > > _______________________________________________ OSPF mailing list [email protected] https://www.ietf.org/mailman/listinfo/ospf
