SYSTEMD-NETWORKD.SERVICE(8) systemd-networkd.service SYSTEMD-NETWORKD.SERVICE(8)
NAME
systemd-networkd.service, systemd-networkd - Network manager
SYNOPSIS
systemd-networkd.service
/lib/systemd/systemd-networkd
DESCRIPTION
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 initrams 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.
CONFIGURATION FILES
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).
SEE ALSO
systemd(1), systemd.link(5), systemd.network(5), systemd.netdev(5), systemd-networkd-wait-online.service(8)
systemd 237 SYSTEMD-NETWORKD.SERVICE(8)