| 摘要 |
PROBLEM TO BE SOLVED: To execute migration processing of a virtual node without interrupting a service of the virtual node constituting a virtual network.SOLUTION: A network system comprises a plurality of physical nodes including computer resources. The network system is allocated the computer resources included in the physical nodes and a virtual network comprising a plurality of virtual nodes executing services is constructed. If a first virtual node executing a service with the use of the computer resources of a first physical node is moved to a second physical node, the network system creates a communication path to realize a virtual link for connecting the first virtual node with an adjacent virtual node on a physical link connecting the second physical node and an adjacent physical node, starts the service executed by the first virtual node with the use of computer resources secured by the second physical node, and switches the created communication path as the virtual link. |
