[j-nsp] eBGP neighbor link failure detection

Mark Tinka mark.tinka at seacom.mu
Sat Mar 15 01:06:54 EDT 2014


On Friday, March 14, 2014 11:52:05 PM Andy Litzinger wrote:

> is it fair to say that if you are directly connected to
> your neighbor and that interface goes down that the
> expected behavior of GR is it should abort and routes
> from that neighbor should immediately be removed?

One thing to note about Juniper is that when GRES is enabled 
and you have an RE switchover or failure event, even with 
loss of BGP sessions, KRT routes remain valid for 3x 
minutes, and the router can continue to forward traffic for 
this amount of time based solely on the KRT routes.

But this is only applicable on systems that have multiple 
RE's.

Mark.
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