How to test and use VisionSOM-6ULL Ethernet interface
From SomLabs Wiki
How to test and configure Ethernet interface
Default configuration
By default your VisionSOM-6ULL IP address is retrieved from DHCP server (if it is available in your network), it is a good feature, as you can connect it to network without any configuration and it will be accessible. To get VisionSOM-6ULL IP address you can log in via UART-USB converter and execute ip a command:
root@somlabs:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether a6:e3:1c:a0:3d:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.24/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 2a02:a310:813c:d700:a4e3:1cff:fea0:3db0/64 scope global mngtmpaddr dynamic
valid_lft 1066909sec preferred_lft 462109sec
inet6 fe80::a4e3:1cff:fea0:3db0/64 scope link
valid_lft forever preferred_lft forever
3: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default
link/sit 0.0.0.0 brd 0.0.0.0
In this case VisionSOM address is 192.168.0.24. Other way to get the IP is to use network scanner, for example Advanced Network Scanner for Windows or use arp-scan tool on Linux:
root@somlabs:~# apt install arp-scan root@somlabs:~# arp-scan --interface=eth0 --localnet Interface: eth0, datalink type: EN10MB (Ethernet) Starting arp-scan 1.9 with 256 hosts (http://www.nta-monitor.com/tools/arp-scan/) 192.168.0.1 90:5c:44:57:3b:4a (Unknown) 192.168.0.87 00:c0:00:04:52:5b LANOPTICS, LTD. 192.168.0.178 58:fb:84:a3:a2:82 (Unknown) 3 packets received by filter, 0 packets dropped by kernel Ending arp-scan 1.9: 256 hosts scanned in 3.178 seconds (80.55 hosts/sec). 3 responded
If you want to check if your board can communicate with Internet then you can use ping command with external IP address like 8.8.8.8 (Google DNS):
root@somlabs:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=59 time=10.7 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=59 time=16.7 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=59 time=15.1 ms 64 bytes from 8.8.8.8: icmp_seq=4 ttl=59 time=12.9 ms ^C --- 8.8.8.8 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3005ms rtt min/avg/max/mdev = 10.782/13.900/16.735/2.244 ms
In some cases dynamic IP address can cause problems, for example when you want to forward a port on the router to your Linux system. In such case you should assign static IP address, to do that you need to edit /etc/network/interfaces, it should contain:
auto eth0 iface eth0 inet static address 192.168.0.100 netmask 255.255.255.0 gateway 192.168.0.1
Of course you should modify IP addresses and mask depending on your network configuration. Now you need to restart netrwork services:
root@somlabs:~# service networking restart
Note that if you restart networking services via SSH connection then connection will be lost.
