| 摘要 |
In order to prevent unnecessary APIPA process from being executed in a LAN environment which does not adopt APIPA, an ICMP echo request for a predetermined IP address is broadcast. Whether there are more than N apparatuses using APIPA is checked based on the replies, and if there are, IP address setting by APIPA is executed. In a LAN environment which adopts APIPA, whether the IP address to be assigned to an apparatus is already being used by another apparatus is checked. If the date and time when the another apparatus was assigned the IP address is earlier than the date and time when the apparatus was assigned the IP address, APIPA is executed to decide the IP address of the apparatus.
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