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

[Saku Ytti]

I don't think that's true. Perhaps a bug you encountered?

advertise-best-external definitely should work for unlabeled IP.

On Wed, 10 Dec 2025 at 17:14, Gert Doering <gert at greenie.muc.de> wrote:
>
> 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



-- 
  ++ytti