| 摘要 |
<p>PROBLEM TO BE SOLVED: To resolve problems that, in the case that a loop not depending on LAG setting mistakes is generated in an adjacent device, a communication device cannot detect and deal with such loop, and that a loop detection device is required as well as the communication device in a network, which causes much cost for the device.SOLUTION: A communication device comprises: frame production means producing a frame including a predetermined index and whose destination MAC address is a broadcast address; transmission means transmitting the frame via a LAG port; count means outputting frame number information that is a result obtained by counting a frame received from the LAG port in a predetermined time period from a timing when the transmission means transmits the frame and including the predetermined index; and determination means determining presence or absence of loop occurrence in a communication device adjacent via the LAG port on the basis of the inputted frame number information, and outputting the result.</p> |
