Patent ID: 8135284

Claim:
A fiber misconnection detecting method comprising: setting a node identifier of a source node and an interface identifier of an interface of the source node for inputting/outputting a signal in a predetermined first field of a first header, and transmitting the node identifier and the interface identifier of the source node set in the first field of the first header to a destination node; setting a node identifier of a destination node and an interface identifier of an interface of the destination node for inputting/outputting a signal in a predetermined first field of a second header, and transmitting the node identifier and the interface identifier of the destination node set in the first field of the second header to the source node; when the node identifier and the interface identifier set in the first field of the second header are received at the source node from the destination node, setting the node identifier and interface identifier copied from the first field of the second header in a predetermined second field of a third header, setting the node identifier and the interface identifier copied from the first field of the first header in a first field of the third header, and transmitting the third header to the destination node; and determining that a connection between the nodes is correct when the node identifier and the interface identifier set in the first field of the third header and the node identifier and the interface identifier set in the second field of the third header are received at the destination node and the node identifier and the interface identifier of the second field of the third header are consistent at the destination node with the node identifier and the interface identifier of the first field of the second header set at the setting of the first field of the second header and determining that the connection is not correct when the node identifier and the interface identifier of the second field of the third header are not consistent at the destination node with the node identifier and the interface identifier of the first field of the second header set at the setting of the first field of the second header.