An information processing device includes a bridge unit that connects with one or a plurality of IO device groups via a network, a connection management unit that manages a connection of the bridge unit, an allocation priority instruction unit that stores an instruction or a fixed value that is a priority condition for allocating resources, a resource amount search unit that searches resources used by IO devices of an entire system that includes the IO devices, a remaining resource calculation unit that calculates a remaining resource amount, a reservation resource amount output unit that calculates and outputs a number of virtual PCI bridges and a reservation resource amount, and a virtual bridge resource setting unit that sets the bridge unit based on the number of virtual PCI bridges and the reservation resource amount.