systemd-networkd.service, systemd-networkd - Network manager
systemd-networkd.service
/lib/systemd/systemd-networkd
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 .network file with an appropriate [Match] section, see
systemd.network(5). 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 explicitly tell
systemd-networkd to ignore a link by using
Unmanaged=yes option, see
systemd.network(5).
When systemd-networkd exits, it generally leaves existing network devices and
configuration intact. This makes it possible to transition from the initrd 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.
systemd-networkd may be introspected and controlled at runtime using
networkctl(1).
The configuration files are read from the files located in the system network
directory /lib/systemd/network, the volatile runtime network directory
/run/systemd/network and the local administration network directory
/etc/systemd/network.
Networks are configured in .network files, see
systemd.network(5), and
virtual network devices are configured in .netdev files, see
systemd.netdev(5).
networkctl(1),
systemd(1),
systemd.link(5),
systemd.network(5),
systemd.netdev(5),
systemd-networkd-wait-online.service(8),
systemd-network-generator.service(8)