Whether the TN12LSX and TN13LSX boards can be interconnected with each other

The TN12LSX board supports FEC or AFEC while the TN13LSX board supports FEC or AFEC-2.
The TN12LSX board in AFEC mode cannot be interconnected with the TN13LSX board in AFEC-2 mode. The two boards can be interconnected only when the FEC types of the boards are both set to FEC. Alternatively, if the FEC working status of the board is disabled, the board can also be interconnected.

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