| 摘要 |
PROBLEM TO BE SOLVED: To realize a setting of IP addresses for units beyond a router even by an inexpensive unit and usual protocol with suppressing of heavy load to network. SOLUTION: In this setting method, a packet requesting a MAC address of node for a predetermined multicast address is transmitted by a multicast, at the node given the packet, a packet including the MAC address of the node itself is transmitted to the multicast address. IP addresses are given by specifying the node to set IP addresses based on the result of an answering means, the set packet including the IP addresses and the MAC address of the node are transmitted to the predetermined multicast address. If the MAC address in the set packet is the MAC address of the node itself, the IP addresses in the packet are set as IP addresses of the node itself.
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