I’ve never really had much luck with using Route Filter’s and Policy Filters to set preferences with BGP routes.
So I wanted to find how to achieve my goal.
So I have 2 uplinks from my ISP, both running at 1Gbps. Each link goes into a separate router. One is a Mikrotik x86 the other is my VyOS box.
What I want to be able to do, is set the BGP prepend on my advertised routes to my ISP, so that I can effectively define a “primary” router between the two. This is so I can fail over to the VyOS box from the Mikrotik box, and have the VyOS box as the preferred route. So I can decommission the Mikrotik box without losing connectivity.