I assume you mean a minimum of 2 RPAs or 2 vRPAs on each cluster (in that specific example, there are two RP clusters). Furthermore, for this type of configuration, you will need RP/EX since RP/SE supports one CX/VNX array per cluster and in the configuration above, there are two arrays connected to the site B RP cluster.  Hope that helps, Idan
Is it possible to have a cascaded replication where vRPA -> RPA -> vRPA ? where vRPA is a virtual appliance and RPA is a physical Appliance. Rgards
Cascading RecoverPoint