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 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.

       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-networkd-generator.service(8)