Why does your network card not work properly? (Part 2)

When dealing with the communication problem between the device and the computer, it was found that the adaptive rate gigabit full load test was abnormal. After investigation, the main problem was that the superposition of TXD3 line problems caused signal integrity disturbance and communication failure. In addition, the article also introduces common Ethernet faults and other design debugging points. These empirical methods are of reference significance to technicians in the automotive-related industry.