TS-4900 Network configuration example

From Technologic Systems Manuals

Our Yocto image uses systemd which stores its network files in /etc/systemd/network/. Yocto will automatically enable DHCP on its wired interfaces. This can be overridden to set a static IP or enable other options for DHCP. The only requirement is that this file is named /etc/systemd/network/XX-wired.network Where "XX" is a number smaller than 80, e.g. /etc/systemd/network/79-wired.network This format must be used for all eth* and en* named network interfaces. The lower file names will take priority.

An example of a static configuration would be:

/etc/systemd/network/42-wired.network

[Match]
Name=eth0

[Network]
Address=192.168.0.50/24
Gateway=192.168.0.1
DNS=192.168.0.1

DNS will be loaded from /etc/resolv.conf. To make this use a static DNS:

rm /etc/resolv.conf
echo "nameserver 8.8.8.8" > /etc/resolv.conf
echo "nameserver 8.8.4.4" >> /etc/resolv.conf

To use the DNS assigned by DHCP, run:

ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf

For more information on what options are available to configure the network, see the systemd network documentation.