| 摘要 |
Systems and methods are disclosed for switching servers in a network computer system comprising a plurality of servers each of which has a corresponding actual address, and all having an imaginary address in common. According to the disclosed systems and methods, a packet containing a network trailer addressed to an imaginary network address is transmitted to a gateway. The gateway generates a new packet containing the network trailer, addresses the new packet with an actual IP address of one of a plurality of servers according to states of the system, and then transmits the new packet to the server. The server periodically informs the gateway of a state of its own imaginary network address, and the gateway updates its own IP address correspondence table. For remote servers interconnected via a WAN environment, service may be provided to a client by one remote server taking over the service provided by another in the same manner as if the server were adjacent to each other.
|
