The MCU board has a label to record the MAC address of the board's network port. As shown below, you can see the red marked label:
The tag value is 883FD35867EB-ED(3), which represents the three MAC addresses of the board, corresponding to the three network ports of fe\ge0\ge1.
The specific correspondence is:
Fe 88-3F-D3-58-67-EB
Ge0 88-3F-D3-58-67-EC
Ge1 88-3F-D3-58-67-ED
If the MAC address of the network port is duplicated, you can check the MAC address of each network port on each card. Then log in to the corresponding board and set the factory default value.
E.g:
Emtest setmac fe 88-3F-D3-58-67-EB
Emtest setmac ge0 88-3F-D3-58-67-EC
Emtest setmac ge1 88-3F-D3-58-67-ED
