as far as I know you cannot use a vIP address not from the network
but as long as the physical addresses are not used why not using a /29 network for the physical address with the VIP adress contained in the /29 network
the only drawback is that you cannot reach that /29 addresses if they are also remote
thaks for the replay,
I tested it and it's working fine
/29 from my side while its a /30 from the isp side.