Anyone know a trick to get FRR/BGP to install a route to a remote host that is preferred over a local one?

Specifically I want the iBGP peers IPs to fall back to a local dummy interface when the route vanishes to serve a "site is under maintenance" message.

How do you do that properly?

(Also this is my first time configuring BGP myself and not just designing the flow and having someone else write the config...)

#BGP #HomeLab