Aijun, You are mixing flooding speed with area convergence and with failure detection. Those are completely orthogonal elements.
You questioned use of BFD - all I am stating that there is no easy way to detect failure of the neighbour when LOS trigger is not an option. Thx, R. On Tue, Nov 23, 2021 at 1:26 PM Aijun Wang <[email protected]> wrote: > Hi, Robert: > > Aijun Wang > China Telecom > > On Nov 23, 2021, at 20:00, Robert Raszuk <[email protected]> wrote: > > > Dear Aijun, > > >> [WAJ] Once there is a link/node failure, upon receiving the updated LSA, >> the ABR .... >> > > That node failure will need to be detected fast. > > The entire discussion here is to do it reasonably fast or as fast as > possible. > > [WAJ] And also as less configuration as possible. We have invested several > tools to increase the speed of LSA flooding. > > That is why such detection must happen quickly via LOS or BFD or CFM > etc.... That is way before ABR will receive any LSA/LSP from the adjacent > nodes informing it of the failed adj. And in fact all such adj nodes MUST > do it fast as ABR will not react till it hears bad news from every node > previously connected to such PE. > > [WAJ] The reaction time depend on the IGP convergence time after one node > is detached from the network. It should be in milliseconds within one area? > Right? > > > In every solution we work on we must see a full picture, not just single > pieces of the puzzle. > > Thx, > R. > > > > > _______________________________________________ > Lsr mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/lsr > >
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