How to deal with the SUBCARD_MISMATCH alarm on OSN 1800V

Dear friend!
Possible Causes:
Cause 1: The subboard that is not supported is inserted into the board.
Cause 2: For high-power optical modules, in scenarios where only one module is supported, optical modules are inserted into both subboard slots 1 and 2.
Cause 3: On the NMS, if the logical fiber connection of the board is missing or incorrectly connected.

Procedure:
Cause 1: The subboard that is not supported is inserted into the board. Replace the subboard with one that is supported by the board.
Cause 2: For high-power optical modules, in scenarios where only one module is supported, optical modules are inserted into both subboard slots 1 and 2. After ensuring that the optical module in subboard slot 2 carries no service, remove the module. Then, the alarm is cleared.
Cause 3: Correct logical fiber connections.

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Thank you!

Hello friend! hope it can help:

Root Cause:

The type of the logical subcard is different from that of the physical subcard.

Solution Description:

After the two ports are added as DCM ports, the logical subboard type is automatically changed to OAU. In this case, the logical subboard type is consistent with the physical type, and the alarm is cleared.

https://forum.huawei.com/enterprise/en/troubleshooting-subcard-mismatch-alarm-reported-in-the-tmb1dap-board/thread/690639-875

Thanks!