An embodiment of the invention includes a network control system for a communication network comprising a first interface configured to receive an update message wherein the update message indicates a status change of a first gateway and wherein the first gateway provides an interface between a first network and a second network, and a processing system configured to update a routing table based upon the update message and a distance vector associated with the first gateway wherein the routing table comprises a Telephony Routing over Internet protocol (TRIP) routing table.