I'm wondering if there is a way with bird to only import static routes from the kernel routing table. Routes are currently being managed directly in the linux routing table via keepalived, however, I want to announce them out via BGP. 

I have tried just;

kernel { 

  import all;

  export all;

}

and this picks up the routes I want, however, it also imports a load of unreachable routes that I don't want to advertise.