i made a custom board that uses the same chips (DP83822 , DP83TC811) as the DP83TC811EVM. I have automotive ethernet (DP83TC811) connected to the control unit and ethernet (DP83822) to the PC. I read messages on the PC using the terminal. The problem is that the connection is unstable and disconnects and reconnects.
Can you please advise me where to look for a problem? On the board in the hardware or in the settings of the DP83822 and DP83TC811 chip registers? I did not set the registers in any way and they are in the default state.