systemd-networkd.service, systemd-networkd — Network manager
systemd-networkd is a system service that manages networks. It detects and configures network devices as they appear, as well as creating virtual network devices.
To configure low-level link settings independently of networks, see systemd.link(5).
systemd-networkd will create network devices based on the configuration in systemd.netdev(5) files, respecting the [Match] sections in those files.
systemd-networkd will manage network addresses and
routes for any link for which it finds a
with an appropriate [Match] section, see
For those links, it will flush existing network addresses and routes when
bringing up the device. Any links not matched by one of the
.network files will be ignored. It is also possible to
systemd-networkd to ignore a link by
Unmanaged=yes option, see
systemd-networkd exits, it generally leaves
existing network devices and configuration intact. This makes it possible to
transition from the initramfs and to restart the service without breaking
connectivity. This also means that when configuration is updated and
systemd-networkd is restarted, netdev interfaces for
which configuration was removed will not be dropped, and may need to be
cleaned up manually.
The configuration files are read from the files located in the
system network directory
the volatile runtime network directory
/run/systemd/network and the local administration