Patent ID: 7957405

Claim:
A recording medium storing a packet communication program, said packet communication program causing an information processing apparatus connected to a network to communicate with another system through said network to execute steps, said information processing system comprising a packet control unit which generates a first packet corresponding to an IPv4, and a store unit which holds correspondence between addresses corresponding to said IPv4 and addresses corresponding to an IPv6 allocated to said another system, said execution steps comprising: searching by a protocol conversion unit of said information processing unit, whether an IPv6 address corresponding to IPv4 contained as a destination address in the IP4 packet generated by said packet control unit is held in said store unit; and converting by said protocol conversion unit, the IP4 packet generated by said packet control unit to an IPv6 packet containing the IPv6 address held in said store unit as a destination address when the IPv6 address is held in said store unit.