NODE COMPUTER, NETWORK SWITCHING METHOD AND PROGRAM IN COMPUTER NETWORK COMMUNICATION SYSTEM
PROBLEM TO BE SOLVED: To assure the consistency of network switching in plural node computers communicating via one side of duplex network systems more surely than ever.SOLUTION: A node computer 100 connected to dual-system networks LAN#1 and LAN#2 includes a network switching unit 26 which switches...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To assure the consistency of network switching in plural node computers communicating via one side of duplex network systems more surely than ever.SOLUTION: A node computer 100 connected to dual-system networks LAN#1 and LAN#2 includes a network switching unit 26 which switches a network used in application level communication from one to another on the basis of a registered GW. The network switching unit 26 updates the registered GW of the local node computer on the basis of information about the state of whether the LAN#1 and the LAN#2 are normal or not as determined by a normal network determination unit 25, information on the GW of the local node computer and information on GWs of distant node computers included in existence monitoring packets from the distant node computers, and then switches the network used in application level communication to the LAN#1 or the LAN#2 connected to the registered GW thus updated. |
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