US Patent 9294393 Interconnecting virtual private networks

In one embodiment, a method includes receiving from a plurality of customer edge devices, endpoint addresses at a central mapping system operating as a control plane for a provider network in communication with a plurality of customer networks, and mapping the endpoint addresses to provider edge devices in the provider network. Wherein the customer edge devices store customer endpoint routes for active flows and the provider edge devices store customer edge device site locator addresses for use in a mapping and encapsulation overlay in the provider network. An apparatus and logic are also disclosed herein.