| 摘要 |
When a server in standby mode receives no heart beat communication message from a server in execution mode for a predetermined time period, the standby mode server assigns an IP address stored in a storage of the standby mode server to own server. And the standby mode server changes the current mode to execution mode and the server changed to the execution mode broadcasts the IP address assigned to own server and own MAC address for a predetermined period of time. When the same IP address as the IP address assigned to own server and the MAC address of the server in the standby mode are received; the execution mode server deletes the IP address that has been assigned to the own server.
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