Router apparatus, communication apparatus, network address management system, network address management method and network address management program

A communication apparatus comprising:

• a transmitting unit configured to transmit information indicating that the communication apparatus is connected to a network to a router apparatus connected to the network;
• a receiving unit configured to receive from the router apparatus non-collision information indicating that an address to be used in the communication apparatus is not collided in the network;
• and
• a setting unit configured to set the address for use in communicating in the network, in a case where the non-collision information is received by the receiving unit.

A network address management method for a communication system including a router apparatus and a communication apparatus both connected to a network, the method comprising:

• receiving information from the communication apparatus indicating that the communication apparatus is connected to the network;
• storing the information received by the receiving unit;
• predicting an address used in the communication apparatus;
• determining whether or not the address predicted collides with an address used in the network in accordance with the information previously stored;
• transmitting to the communication apparatus non-collision information indicating that the collision of the address has not occurred, in a case where determined that the address predicted does not collide with the address used in the network;
• and
• setting the address included in the collision-free information in the communication apparatus.

A network address management program product for causing a computer, which performs an address management on a network, to execute procedures comprising:

• receiving information from the communication apparatus indicating that the communication apparatus is connected to the network;
• storing the information received by the receiving unit;
• predicting an address used in the communication apparatus;
• determining whether or not the address predicted collides with an address used in the network in accordance with the information previously stored;
• and
• transmitting to the communication apparatus non-collision information indicating that the collision of the address has not occurred, in a case where determined that the address predicted does not collide with the address used in the network.