On Sat, Dec 21, 2019 at 12:39:43AM +0100, Nico Schottelius wrote:
> I have had a look at OSPF, but for our relatively simple network it
> looks like an overkill. Do you have any other recommendations for
> what to run the IGP with instead?
>
> The main reason I so far tried to stay on iBGP only is to reduce
> complexity.
Well, you can run just IBGP, if you use direct + 'next hop self' options,
which should be OK in your simple topology.
According to my understanding of the BIRD code, 'next hop self' is only relevant when exporting a locally originated route to a BGP peer. So, assuming the original question was about what happens on R1 and R2, I would not expect it to be relevant at all. Is that right?