[c-nsp] Best Practices for quickly removing routes when BGP peer drops

[Gert Doering]

Hi,

On Wed, Dec 10, 2025 at 05:01:25PM +0200, Saku Ytti via cisco-nsp wrote:
> a) fast-external-fallover is default, you can break it by doing
> multipath (e.g. some configuration related to blackholing next-hop
> manipulation or GTSM may break it)
> b) you may not need 'add-path' to have backup, if you have full-mesh
> 'advertise-best-external' if enough. If you have RR you need both.

"advertise-best-external" was indeed what I was thinking about, thanks.

(Note that on IOS XR this only works if you use labeled unicast, as 
we found out to our dismay...)

gert
-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             gert at greenie.muc.de
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