Hi bird users, I recently came across the following thread [1] when trying to build an IP-in-IP overlay network with bird. Unfortunately, those patches where never merged upstream. Calico still uses a very old fork of bird with those patches applied [2]. I decided to try the path that Ondrej proposed in the thread from 2016. I made the small change from the attached patch and it worked wonderfully for building a dynamically routed IP-in-IP overlay network. Do you think it will take a lot of work to pass, from this proof of concept, to a patch which could be accepted into bird? Is setting "onlink" this way a good idea? I'd be happy to work on improving the patch. Regards, Radu [1] https://bird.network.cz/pipermail/bird-users/2016-September/010633.html [2] https://github.com/projectcalico/bird