| 摘要 |
<p>A monitoring board (20) extracts a MAC address from data flowing within a collision domain (14A) to which a plurality of boards (15) are connected. The monitoring board (20), on the basis of the extracted address information, distinguishes such statuses as participation, separation, and the like related to each board within the collision domain. In addition, the monitoring board (20), on the basis of the discrimination results of the statuses, measures operation time for each board. In addition, the monitoring board (20) stores the operation time for each of the measured boards in a management table (31), and transmits the board information within the management table to a host device (5). The host device (5), on the basis of the board information collected at each of the monitoring boards, manages quality on the basis of the operation times for all boards.</p> |
