Ethernet port test

1) First, insert one end of the network cable into the Ethernet interface of the development board, and connect the other end of the network cable to the router, and ensure that the network is unblocked

2) After the system starts, it will automatically assign an IP address to the Ethernet card through DHCP，No other configuration is required

3) The command to view the IP address in the Linux system of the development board is as follows

orangepi@orangepi:~$ ip addr show eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 4a:fe:2b:3d:17:1c brd ff:ff:ff:ff:ff:ff inet 192.168.1.150/24 brd 192.168.1.255 scope global dynamic noprefixroute eth0 valid_lft 43150sec preferred_lft 43150sec inet6 fe80::9a04:3703:faed:23be/64 scope link noprefixroute valid_lft forever preferred_lft forever

When using ifconfig to view the IP address, if the following information is displayed, it is because sudo is not added. The correct command is：sudo ifconfig Command 'ifconfig' is available in the following places */sbin/ifconfig */usr/sbin/ifconfig The command could not be located because '/sbin:/usr/sbin' is not included in the PATH environment variable. This is most likely caused by the lack of administrative privileges associated with your user account. ifconfig: command not found

There are three ways to check the IP address after the development board starts: 1. Connect the HDMI monitor, then log in to the system and use the ip addr show eth0 command to view the IP address 2. Enter the ip addr show eth0 command in the debugging serial terminal to view the IP address 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: 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; B) Check whether the network cable is plugged in tightly, or try another network cable; 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); 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. In addition, it should be noted that the development board DHCP automatically assigns an IP address without any settings.

4) The command to test the network connectivity is as follows, the ping command can be interrupted through the shortcut key of Ctrl+C

orangepi@orangepi:~$ ping www.baidu.com -I eth0 PING www.a.shifen.com (14.215.177.38) from 192.168.1.12 eth0: 56(84) bytes of data. 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=1 ttl=56 time=6.74 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=2 ttl=56 time=6.80 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=3 ttl=56 time=6.26 ms 64 bytes from 14.215.177.38 (14.215.177.38): icmp_seq=4 ttl=56 time=7.27 ms ^C --- www.a.shifen.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3002ms rtt min/avg/max/mdev = 6.260/6.770/7.275/0.373 ms