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

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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.

Other related questions:
How to rectify the unidirectional communication fault on Eth-Trunk of S series switches
The following features enable you to rectify the unidirectional communication fault on Eth-Trunks of S series switches (except the S1700): 1. 3AH: Monitor the link connectivity through 3AH. If a unidirectional communication fault occurs, the feature ensures the two ends of a link are in the same state. 2. LACP: LACP ensures the same status between the two ends of the Eth-trunk through exchanges of LACPDUs. If a unidirectional communication fault occurs, LACP can detect the fault on time and transfer the selected state to the other side, preventing traffic loss caused by the unidirectional communication fault. Notes: S series switches (except the S1700) running V100R005 and later versions support the device link detection protocol (DLDP). DLDP can monitor the link status of fibers or copper twisted pairs. If DLDP detects a unidirectional link, it automatically closes the relevant port or notifies the user to close the port, depending on the user configuration. This prevents network faults.

How to delete an Eth-Trunk on S series switches
For S series switches (except the S1700), follow these two steps to delete an Eth-Trunk: 1. Delete member interfaces from the Eth-Trunk. You can select either of the following two methods to delete a member interface. Method 1: Run the undo command in the Eth-Trunk interface view. [HUAWEI] interface eth-trunk 1 [HUAWEI-Eth-Trunk1] undo trunkport gigabitethernet 1/0/1�?Method 2: Run the undo command in the member interface view. [HUAWEI] interface gigabitethernet 1/0/1 [HUAWEI-GigabitEthernet1/0/1] undo eth-trunk�?2. Delete the Eth-Trunk. Run the undo command in the system view. [HUAWEI] undo interface eth-trunk 10

How can I do if an IPC fails to power on?
1. Remove the power plug and insert it again. If the IPC is properly powered on, no further action is required. If the fault persists, go to step 2. 2. Check the status of the power indicator. If the power indicator is off, the power supply is faulty. Check the power adapter or power cable. For description of power indicator statuses, see the user manual of the required IPC model. For a PTZ dome camera that has no power indicator, check whether the PTZ of the camera automatically rotates after you power on the camera. 3. Check whether the fault is rectified. If yes, no further action is required. If no, contact the service provider. ----End

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