There are provided a system, a method and a computer program product for routing a data packet. A first router includes a routing table having address routes for routing packets of a first network communication protocol and address routes for routing packets of a second network communication protocol. A source router, adjacent to the first router, stores first network communication protocol addresses of routers adjacent to the first router. The system creates a network communication path from the source router to one or more adjacent routers for only routing the data packets according to a corresponding first network communication protocol address route. The system updates the routing table of the first router to remove the second network communication protocol address routes to the adjacent routers. The system routes the data packet according to the created network communication path and the updated routing table of the first router.