Patent ID: 7590074
Filing Date: 2009-09-15
Classification: H04L

Abstract:
1. A method of obtaining routing information on an as-needed basis, the method comprising the steps of: transmitting known routing information from a gateway to a route server, the routing information comprising intra-site reachability information associated with a network site on a network associated with the gateway; and in operation, when unknown routing information is needed by the gateway to transmit data to another network site on a network that is not associated with the gateway, actively obtaining the unknown routing information by the gateway from the route server on demand, by sending the data to the route server or by sending a request for the unknown routing information to the route server, to request the unknown routing information and thereby obtain the unknown routing information, so that the unknown routing information may be selectively populated to the gateway from the route server as the unknown routing information is needed by the gateway rather than as the unknown routing information becomes known by the route server, the unknown routing information comprising intra-site reachability information associated with the other network site on the network that is not associated with the gateway.