| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent an increase in the amount of transmission on a specific transmission line when a failure occurs.SOLUTION: A ring-type network system comprises: a plurality of network transmission devices 1; one master network transmission device; a blocked-port conversion device; and a frame setting/selection device. The blocked-port conversion device obtains route information in which address information indicating a connection destination is registered; extracts network configuration information indicating a connection relation between the devices from the obtained route information; creates route setting information of the master network transmission device and network transmission device for setting a route of a first virtual transmission line and a route of a second virtual transmission line, from the extracted network configuration information; and fixedly sets the route setting information, which is created by route setting creation means, to the route information of the master network transmission device and the plurality of network transmission devices, for transmission of transmission frames from a terminal device via the frame setting/selection device.</p> |
