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. 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. In every solution we work on we must see a full picture, not just single pieces of the puzzle. Thx, R.
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