Auto answering myself because the answer was alrady in the mailling
lists :
Just set nexthop=127.0.0.1 on the neighbor, then you can blackhole.
https://misc.openbsd.narkive.com/7jcjKEkQ/openbgpd-match-clause-with-multihop-bgp-session
Le 2018-11-23 16:16, Arnaud BRAND a écrit :
Hi misc@ readers,
I have a question regarding the "set nexthop blackhole" nexthop
qualification in OpenBGPD 6.4 stable.
It looks like I have to add "nexthop qualify via default" in order for
the blackholed route to make it from the rib to the fib.
I understand this is standard behaviour for normal BGP nexthop
qualification, but is this mandatory/normal/expected for blackholed
prefixes too ?
I would have thought that since I am blackholing the prefix there's
nothing to qualify for anyway.
Thanks for your help and tremendous work !
Have a nice day !
Arnaud
