I was using UDP, but it keep disconnection since I have to use DSL in one of the locations. The UDP VPN connection would drop as soon as the RIP discovers all possible routs.
My VPN’s are now configured using TCP and stays up 100% of the time.
Even with that, I can only get the RIP to hold the discovered routs for about 1 minute.
I have tried every configurable option withing the RIP interface and the VPN interface and again the RIP will last about 1 minute before it lists that the connection is DOWN. When I check the VPN connection it is listing that the connection is UP.
Per your suggestions, I will keep at least one subnet active and RIP the others.