|'''There are three ways to check the IP address after the development board starts:'''<br>'''1. Connect the HDMI monitor, then log in to the system and use the ip addr show eth0 command to view the IP address'''<br>'''2. Enter the ip addr show eth0 command in the debugging serial terminal to view the IP address'''<br>'''3. If there is no debugging serial port and no HDMI display, you can also check the IP address of the development board's network port through the router's management interface. However, in this method, some people often cannot see the IP address of the development board normally. If you can't see it, the debug method looks like this:'''<br>'''A) First check whether the Linux system has started normally. If the green light of the development board is blinking, it is generally started normally. If only the red light is on, it means that the system has not started normally;'''<br>'''B) Check whether the network cable is plugged in tightly, or try another network cable;'''<br>'''C) Try another router (I have encountered many problems with the router, such as the router cannot assign the IP address normally, or the IP address has been assigned normally but cannot be seen in the router);'''<br>'''D) If there is no router to replace, you can only connect to an HDMI display or use the debugging serial port to check the IP address.'''<br>

'''In addition, it should be noted that the development board DHCP automatically assigns an IP address without any settings.'''<br>