In message <[EMAIL PROTECTED]> Erblichs writes: > > Abhay D.S., > > > Actually it is just a bit more > complicated. > > With OSPF, we should start with a case > of two routers. > > How does the restarting router know > that the restart is done and how does > the other router know that the restart > is done? > > The restarting router can determine > whether NSF and restart is done. Whether > restart required a a standard resync of > the LSDB is almost irrelevant. > > So, the question is why must Gracefull > be successful? It basicly just "reduces" > overhead while NOT distrupting forwarding.
More important it does not slosh all of the BGP routes (hundreds of thousands of them) away from the restarting router and then back. In an IGP only transient routing nasties due to inconsistent notion of whether that router is up or not is something to be avoided (you know, transient loops, transient blackholes, and all that). > Thus, It is done when it re-starts sending HELLOs > and re-extablishes full adjs from the perspective > of the 2nd router. The hellos are the aliveness > criteria from my earlier post. > > ` So, you MIGHT want to track the nbr FSM > if you have access to the OSPF source code. > > Mitchell Erblich > ---------------- > > > "Abhay D.S" wrote: > > > > Mitchell, > > > > 2) Their is no GUARANTEE that any Restart will > > be sucessful, that the LSDB will be stable and/or > > that helper(s) exist. > > > > I wanted an automated and deterministic number 2. > > > > Any ideas or any attempts in the direction of 2 ? > > > > With Regards, > > Abhay Looks to me to be more like a windmill than a dragon. Curtis _______________________________________________ OSPF mailing list [email protected] https://www1.ietf.org/mailman/listinfo/ospf
