Traffic distribution device, traffic distribution method and packet relay method

A traffic distribution program making a computer connectable to a 0-th network, a first network including one or more servers and to a second network connected to said first network and including M-pieces of high-order layer processing devices associated with 0 through M-1, operate as a device comprising:

• first packet relay means translating, each time a packet in which a predetermined destination IP address is set, is received from said 0-th network, this packet into a packet in which a destination MAC address is set as a first network sided MAC address of said high-order layer processing device, which MAC address is associated with a remainder value obtained by dividing a source IP address of the packet by M, and transmitting this packet onto said first network;
• and
• second packet relay means translating, each time the packet is received from said second network, this packet into a packet in which a destination MAC address is a second network sided MAC address of said high-order layer processing device, which MAC address is associated with a remainder value obtained by dividing the destination IP address of the packet by M, and transmitting this packet onto said second network.

A packet relay method for relaying a packet between a 0-th network, a first network including one or more servers and a second network connected to said first network and including M-pieces of high-order layer processing devices associated with 0 through M-1, said method comprising:

• translating, each time a packet in which a predetermined destination IP address is set, is received from said 0-th network, this packet into a packet in which a destination MAC address is set as a first network sided MAC address of said high-order layer processing device, which MAC address is associated with a remainder value obtained by dividing a source IP address of the packet by M, and transmitting this packet onto said first network;
• and
• translating, each time the packet is received from said second network, this packet into a packet in which a destination MAC address is a second network sided MAC address of said high-order layer processing device, which MAC address is associated with a remainder value obtained by dividing the destination IP address of the packet by M, and transmitting this packet onto said second network.