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

[Saku Ytti]

On Wed, 10 Dec 2025 at 20:12, Lukas Tribus <lukas at ltri.eu> wrote:

> I don't understand.
>
> How is this supposed to work without transient loops and without
> tunneling (label unicast/vpnv4), when your core has yet to converge?
>
> For this to work the internal routers you cross all would have to
> converge their FIB at the same time at the same speed and in the same
> order?
>
> What am I missing here?

I don't think that is a requirement. Why would it be a requirement?

The alternative is to blackhole for X or have a transient loop for <X.
So it feels strange that the operator is not allowed to make that
judgement call.

Transient loops are normal anyhow in IP networking if you do IP lookup in core.



-- 
  ++ytti