OVERLAY LINK CALCULATION DEVICE, CALCULATION METHOD THEREFOR, AND PROGRAM

摘要

An overlay link calculation device for determining an overlay link having no overlay link. The overlay link calculation device comprises an overlay network control unit (17) including a topology information acquisition unit (124) for acquiring the topology information of a network layer from a (not shown in the drawing) device having topology information collection means disposed outside of an overlay network node device (1). The device having the topology information collection means is a router or a network management system, for example. A link calculation unit (123) generates an overlay link by calculations on the basis of the topology information obtained from the topology information acquisition unit (124).