Techniques are provided for establishment of multiple concurrent virtual networks. In one example, there is provided a method operable by a virtual network controller (VNC) or the like. The method may involve establishing communication links with a plurality of virtual network interfaces (VNIs) operatively coupled to a plurality of virtual networks. The method may involve establishing a single port communication link with an operating system. The method may involve allowing the virtual networks to be transported on top of a physical network, and facilitating communication between the operating system and the virtual networks via the single port communication link.