IGP(OSPF) learned route not used for iBGP?

[Maria Matejka]

Hello!



On 5/12/23 17:15, Nico Schottelius via Bird-users wrote:
> 
> Hello fellow bird users,
> 
> a quick IGP/iBGP question:
> 
> Why does apu-router1 that should learn the IPv6 default route from
> server138 complain about not accepting the route?
> 
> May 12 17:13:18 apu-router1 daemon.err bird: server138_v6_v4: Invalid NEXT_HOP attribute - address 2a0a:e5c0:32:2::21 not directly reachable
> May 12 17:13:18 apu-router1 daemon.err bird: server138_v6_v4: Invalid route ::/0 withdrawn

Could you please disclose what "show interfaces" writes out? BIRD 
basically checks whether it's possible to infer the nexthop interface 
from its address based on the addresses assigned to interfaces. This 
way, setting up wireguard with OSPF can be particularly tricky.

Maria