STP abnormal status locating method on an AR router

If the STP status on an AR router is abnormal, follow the procedure below for fault locating:
1. Check configuration of different interfaces.
2. Run the debug stp packet command to check STP packet receiving/transmission status on different interfaces.
3. If the fault cannot be located, collect logs, alarms, and debug information that are generated when the fault occurred, and contact Huawei engineers.

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