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 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).

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

       networkctl(1), systemd(1), systemd.link(5), systemd.network(5), systemd.netdev(5),
       systemd-networkd-wait-online.service(8), systemd-network-generator.service(8)