| 摘要 |
<p>Provided is a network system comprising a backbone network (21) and a device network (22) connected to each other at two points, wherein the device network (22) is composed of a plurality of devices (11-1, 11-2, 11-3, 11-4) connected in daisy-chain form, and devices (11-1, 11-4) are connected to the backbone network (21). Device (11-4) blocks communication through a port thereof directly connected to a switch device (2-1) when communication with a management device (1) can be executed through device (11-1), and starts communication through that port when a failure is detected in communication with the backbone network (21) via device (11-1).</p> |
