An information processing device according to the present invention includes: a flow information storage unit that stores a correspondence between a flow identifier that is information included in a packet, and a network interface; and a switching unit that transfers the packet to either one of a first type of the network interface that gives suggestion information that a destination computer that is a destination of the packet uses for properly processing the packet to the packet, and a second type of the network interface that does not give the suggestion information to the packet based on the information stored in the flow information unit.