Patent ID: 8064430

Claim:
An intermediate router apparatus which provides access to a global network for a single or plurality of network element apparatuses, the intermediate router apparatus comprising: an advertising section that includes a unique global address of the intermediate router apparatus in an advertisement message that is transmitted to the single or plurality of network element apparatuses; a generating section that generates a binding update message which contains the unique global address of the intermediate router apparatus; and an optimal forwarding establishing section that receives packets transmitted by the said single or plurality of network element apparatuses, wherein if the received packets are marked to indicate a request for a more optimal forwarding path, the optimal forwarding establishing section sends the binding update message generated by the generating section to establish an optimal forwarding path, if an optimal path for a destination specified in the received packets is not established, wherein if the received packets are marked to indicate a request for a more optimal forwarding path, the intermediate router apparatus transmits the received packets through the optimal path if the optimal path for the destination specified in the received packets is established.