Using Vplex, VNX5300 and RPA CDP

Hi,

one question. In a client that has two sites, each with a VNX5300, now we implement VPLEX Metro (frame based) in both. And besides, RecoverPoint CDP will be installed on one of the sites. I know that licensing will be RecoverPoint/EX, but inittialy will not protect the entire area of VNX, only a part.So, I need to license RecoverPoint with Total Capacity of VPLEX, or with Total Capacity of VNX or only the area that will be protected by RecoverPoint?

Thanks