Maximum number of MAC address flapping times that CE series switches can detect

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The maximum number of MAC address flapping times that CE series switches can detect is 65535. When the number of flapping times is greater than 65535, the MoveNum field is still 65535 in the display mac-address flapping command output. In most cases, there is a low probability that MAC address flapping occurs many times. If the number reaches the threshold, you can run the reset mac-address flapping record command to clear the detection record on CE series switches.

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Maximum number of MAC address flapping times that CE series switches can detect
The maximum number of MAC address flapping times that CE series switches can detect is 65535. When the number of flapping times is greater than 65535, the MoveNum field is still 65535 in the display mac-address flapping command output. In most cases, there is a low probability that MAC address flapping occurs many times. If the number reaches the threshold, you can run the reset mac-address flapping record command to clear the detection record on CE series switches.

After an interface on a CE switch becomes Up during the aging time, will the switch still detect MAC address flapping during the remaining aging time
The default aging time of flapped MAC addresses is 300 seconds. You can run the error-down auto-recovery cause mac-address-flapping interval interval-value command to configure it. After the command is executed, if MAC address flapping stops and the interface becomes Up after the delay, the CE switch no longer detects MAC address flapping during the remaining aging time. This is because the aging time does not expire. If detection on MAC address flapping is required, it is recommended that the delay for an interface to automatically become Up be set greater than the aging time of flapped MAC addresses.

When does a CE switch report an alarm after detecting MAC address flapping
In versions earlier than V100R005C10: A CE switch reports an alarm after detecting MAC address flapping for three times. The number of times cannot be configured. In V100R005C10 and later: By default, a CE switch reports an alarm after detecting MAC address flapping for 10 times. The number of times can be configured using the mac-address flapping detection [ security-level { low | middle | high } ] command.

How to configure MAC address flapping detection
To configure MAC address flapping detection, use this following method. [HUAWEI-vlan10] loop-detect eth-loop alarm-only In V200R001 and later versions, run the following command in the system view to enable MAC address flapping detection. [HUAWEI] mac-address flapping detection This function is enabled by default.

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