| 摘要 |
For providing a loop detection method and device which enables a general L2 switch to be applied and complicated condition equations or the like for determining a loop generation, a terminal moving state in which packets of a same transmitting source address are inputted to different ports is detected; a frequency of detecting the terminal moving state is counted for each port; and, when the frequency exceeds a threshold, it is regarded that a loop has occurred at the port.
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