A method implemented by network element (NE) configured as a local cloud switch point (CSP), the method comprising receiving a first post message from a remote CSP via a cloudcasting network, wherein the first post message indicates a remote virtual extensible network (VXN) identifier (ID) of a remote virtual network attached to the remote CSP, receiving a first data packet from a local virtual network attached to the local CSP, wherein the first data packet is associated with the remote virtual network, performing encapsulation on the first data packet to produce a first encapsulated data packet by selecting an encapsulation header for the first data packet based on the remote VXN ID and not based on network protocols of the local virtual network and the remote virtual network, and sending the first encapsulated data packet to the remote CSP.