Host routes – ARP on wireguard interfaces?

[Toke Høiland-Jørgensen]

Matthias Urlichs <matthias at urlichs.de> writes:

> Hi,
>
> My problem: I have a couple of host routes within my network that point
> to a service's "current master". When that machine goes down, I need to
> automatically redirect its address to a different gateway. That's easy –
> lookup the nexthop for the "real" server address and change the host
> route – except when the destination is on wireguard and needs to be
> (re)directed to a (different) peer.
>
> My preferred solution for this (and also the one that is most intuitive
> IMHO) would be some sort of pseudo-ARP – just enough to make "ip route
> add FOO via BAR" work, 'BAR' being a host address that's associated with
> exactly one wireguard peer.
>
> Thoughts?

I'm not sure I quite understand what it is you are trying to achieve;
why can't just you reconfigure the wireguard interface to route the IP
to the right peer?

-Toke