Patent ID: 7649852

Claim:
A method in a mobile router of a clustered network, the method comprising: establishing within the clustered network a network topology model, including: (1) outputting a first router advertisement message having tree information option fields specifying the mobile router as a top level mobile router, and a corresponding preference value, (2) receiving at least one second router advertisement message that includes information for reaching other mobile routers having sent the second router advertisement message, and the at least one second router advertisement message further including a corresponding tree information option field specifying the mobile router as the top level mobile router, and (3) storing the information for reaching the other mobile routers in a routing table; receiving a third advertisement message from one of the other mobile routers specifying information for reaching a second clustered network, the second clustered network reachable via a border router having connected with the clustered network; and storing the information for reaching the second clustered network in the routing table.