| 摘要 |
A network system according to the present invention includes a backbone network (100) that is constituted by combining a plurality of switch devices (1, 2), and a subnetwork (200) that is constituted by a plurality of switch devices (3-5) connected linearly, where the switch devices (3, 5) positioned at both ends of the linear connection are connected to the backbone network (100), wherein among physical ports included in the switch devices that constitute the backbone network, a first physical port (11) that is one of two physical ports to which the subnetwork is connected blocks a packet with a specific logical port number having arrived from a specific direction, and passes other packets, and a second physical port (21) that is the other of the two physical ports passes a packet with the specific logical port number having arrived from the specific direction, and blocks other packets. |
