On Wed, Jan 10, 2024 at 10:02:49AM +0100, Lukas Haase via Bird-users wrote: > Hi Maria, > > Thank you for respecting. First of all, sorry for my duplicate message. (My > browser crashed and I did not realize the email was sent) > > > Gesendet: Mittwoch, den 10.01.2024 um 08:52 Uhr > > Von: "Maria Matejka via Bird-users" <bird-users@network.cz> > > An: bird-users@network.cz > > Betreff: Re: Inject default route via OSPF, but only to specific OSPF peer > > and contingent on BGP session established > > > > Hello! > > > > TL;DR: That's currently not possible. But there are other options. > > To me, my setup sounds like the most common, most normal configuration one > could imagine. The fact that this sounds so troubling makes me think: Am I > doing something conceptually wrong? > > How would one implement my scenario?
In general, OSPF supposes that all routers in one area have the same set of routes / network destinations, they are not announced to some specific router, but to everybody in the area. You wrote: > Both border gateways act as default gateways for the internal router. > In order to create redundancy, each border gateway should send the > default route via OSPF to the internal router. However, the default route > should not be sent to any other device (otherwise it would mess up > everything, incl tunnels). The other devices do not have a default route? Or use one from the internal router? You could probably have separate area for gateways and internal router, and another area (perhaps stub / NSSA) for one with other devices, or just use IBGP as you suggested. -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santi...@crfreenet.org) "To err is human -- to blame it on a computer is even more so."
