Systemd network easy configuration
Published:
By Enrico Rossi
Category: blog
Examples of systemd network configurations.
These are some collection of systemd network configuration. It does not require anything installed but systemd, not even ifupdown.
note: Debian 9 aka Stretch
Simple DHCP ethernet setup
Interface: eth0, file name is not important, but it must have the .network suffix.
/etc/systemd/network/wired.network
[Match]
Name=eth0
[Network]
DHCP=ipv4
fixed address
[Match]
Name=eth0
[Network]
Description="My fancy network configuration"
Address=10.10.10.20/24
Gateway=10.10.10.1
DNS=10.10.10.2
DNS=10.10.10.3
Domains=fancynetwork.internal
NTP=ntp.fancynetwork.internal
wireless interface
Authentication are managed by wpasupplicant and wpagui.
/etc/systemd/network/wireless.network
[Match]
Name=wlp3s0
[Network]
DHCP=ipv4
activate systemd networkd and resolved.
systemctl start systemd-networkd
systemctl enable systemd-networkd
systemctl start systemd-resolved
systemctl enable systemd-resolved
rm /etc/resolv.conf
ln -s /run/systemd/resolve/resolv.conf /etc/
systemctl status systemd-timesyncd
virtual bridge for VMs
/etc/systemd/network/bridge.netdev
[NetDev]
Name=br0
Kind=bridge
/etc/systemd/network/bridge.network
[Match]
Name=br0
[Network]
Address=10.123.45.1/24
VLAN interface
When your network is a particular vlan you receive on a tagged interface (trunk). Suppose eno1 is an interface you have connected to a trunk with many vlans and you want to use the vlan id 20.
/etc/systemd/network/eno1.network
[Match]
Name=eno1
[Network]
VLAN=eno1.20
/etc/systemd/network/eno1.20.netdev
[NetDev]
Name=eno1.20
Kind=vlan
[VLAN]
Id=20
/etc/systemd/network/eno1.20.network
[Match]
Name=eno1.20
[Network]
Description="My fancy network configuration"
Address=10.10.10.20/24
Gateway=10.10.10.1
DNS=10.10.10.2
DNS=10.10.10.3
Domains=fancynetwork.internal
NTP=ntp.fancynetwork.internal