ADDRESS SELECTION POLICY GENERATING METHOD OF GATEWAY APPARATUS TO RECEIVE ALLOCATION OF ADDRESS BLOCK OR ADDRESS FROM PLURAL NETWORK PROVIDERS, AND GATEWAY APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a technology to reduce a synchronous time between a change of a topology of a network and an address selection policy (reference to select the address out of a plurality of addresses).;SOLUTION: A gateway apparatus 200 stores a pair of an allocated network provider or a notified circuit and an allocated address block or the address, receives a path information from the network provider by a path information exchanging protocol, and generates and stores a pair of a destination address block and the address block allocated by the network provider or the address regarding the address block obtained by the path information as the destination address block of the network provider who has notified the path information, based on the pair of the network provider or the circuit and the allocated address block or the address and the pair of path information and the network provider who has notified the path information or the circuit.;COPYRIGHT: (C)2007,JPO&INPIT