How to rectify the unidirectional communication fault on an Eth-Trunk

To rectify the unidirectional communication fault on an Eth-Trunk, the following features are required:
802.3ah: The link connectivity can be detected through 802.3ah. When a unidirectional communication fault occurs, the status of the two ends of the trunk can be the same in time.
LACP: Through the exchange of LACPDUs, LACP can ensure that the status of the two ends of the trunk is the same. When a unidirectional communication fault occurs, LACP can detect the fault in time and transfer the selected status to the other side, thus solving the packet loss problem caused by the unidirectional communication fault.
NOTE:
In V100R005 and later versions, DLDP can monitor the link status of optical fibers or copper twisted-pair cables. If a unidirectional link exists, DLDP automatically disables the interface or prompts the user to manually disable the interface. This prevents network faults.

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