A method performed by a switch device including receiving, from a source host node, a frame including a MAC address of the source host node as a source MAC address; a MAC address of a destination host node as a destination MAC address, and information indicating a type of frame as a request frame; sending the frame towards the destination host node; generating a first reply frame including the MAC address of the source host node and information indicating a type of frame as a reply frame, the information indicating in a source MAC address field of the first reply frame including a switch ID, a sequence number equal to 0, a hop number equal to 1, and incoming port information that the switch device uses to forward at least one frame towards the source host node; and sending the generated first reply frame towards the source host node.