23.1.8 MAC address learning movement monitoring function
The Switch monitors the number of moves of MAC addresses learned per second for each physical port. If the number of moves exceeds the set number of times and the length of time exceeds the set number of times, the Switch determines that a looping failure has occurred.
This function is called MAC address learning movement monitoring function and is used by setting the number of moves and the duration of MAC address learning per second in the configuration command mac-address-move as the thresholds for determining that a loop failure has occurred. In addition, one of the following actions can be selected for operation when a loop failure is determined to have occurred:
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(1) Making the port inactive and outputting operation messages
Sets the port to inactive status, and outputs operation messages.
Use the operation-command activate to place a port in inactive status in active status after resolving the cause of the looping failure. Automatic recovery can also be set, and active status is automatically changed after the set period.
To place a port that comprises a channel group in inactive status, place all ports that comprise the channel group in inactive status. In addition, if Auto Recovery is specified, all ports are placed in active status. Operation messages are output for all ports.
(2) Output an operation message without changing the port status
The port status is not changed, and an operation message is output.
After a loop failure is determined to have occurred, an operation message is output to notify of recovery when the number of moves falls below the set number of times for 30 seconds. If a port on which a loop failure is detected goes down, no operation message is output.
If it is determined that a loop failure has occurred on a port that is part of a channel group, an operation message is output for that port.