[c-nsp] prevent route entering fib

[Erik Klaassen]

Hi,

On Mon, Nov 16, 2015 at 07:35:48PM +0100, Pierre Emeriaud wrote:
> 2015-11-16 19:26 GMT+01:00 Erik Klaassen <e.klaassen at fr-ix.nl>:
> >
> > What is the best way to prevent the exabgp route entering the fib?
> 
> This may sound weird, but why not announcing the routes from exa with
> an inaccessible next-hop (like 25.1.1.1, not announced globally)? This
> should prevent them from beeing installed in fib.
> 
> Am I missing something that would make this hack not working?

I think this works, but i am also receiving a default route....



>I'm wondering about the same thing, though, but have not found a solution
>yet.  Maybe some VRF trickery, so you have the null route in a VRF and
>leak VRF routes to global BGP on export?  (Not sure if that works)

Yes vrfs.. I have to dive into the lab and test. The goal is to annouce a /32 but not point it to a null route. 
The customer /32 still have to work. With the annoucement of the /32 i can signal my upstream to discard all traffic outside my country or ouside a 1000km radius.

Job gave a nice presentation on this: https://www.youtube.com/watch?v=0ahdxp_btHY

Erik