| 摘要 |
A first relay server stores a first routing target address and a second routing target address. The first relay server stores a first routing target address and a virtual address allocated to the first routing target address while being correlated with each other. The first relay server allocates the virtual address to the first routing target address. The first relay server sets whether communication is conducted using the virtual address or the first routing target address with respect to each second relay server. The first relay server transmits the virtual address allocated to the first routing target address to the second relay server, and receives the second routing target address from the second relay server, so as to establish a routing session with the second relay server. The first relay server performs routing control based on the exchanged routing target address. |
