| 摘要 |
PROBLEM TO BE SOLVED: To easily generate a virtual network without grasp of individual physical network information by a user, when constituting a virtual network spreading across a plurality of physical networks.SOLUTION: A network system includes: a plurality of communication systems for user communication; a plurality of physical network management servers for managing a plurality of physical networks constituted by a plurality of routers; and a virtual network management server for managing a virtual network for connecting between each communication system through the plurality of physical networks. The virtual network management server acquires physical network configuration information, generates management information for managing the plurality of physical networks as one abstract network, and transmits the generated management information to each physical network management server and each router, to thereby constitute the abstract network. |
