VS dependency (BGP route adv)

Environment is 2 BIGIPs in 2 Datacenters. Not in cluster. Both advertise BGP routes (the DR site do that with a worse path).

 

I'm looking in a way to have a dependency between Virtual servers (a group of them, but not all) in such a way that when any VS in that group is down, all other VS in that group are down too and the BGP will advertise the route as not reachable through this path.

 

How to get this dependency? As in the Virtual Address I can only advertise for THIS VS or ALL VS.

 

Would that be an iCall to disable all VS in that group as soon as one of them is down?

 

Any suggestion welcome

 

Thank you very much

 

Alex