systemd Developer Tom Gundersen teg@jklm.no systemd.netdev 5 systemd.netdev Virtual Network Device configuration netdev.netdev Network setup is performed by systemd-networkd8. Virtual Network Device files must have the extension .netdev; other extensions are ignored. Virtual network devices are created as soon as networkd is started. The .netdev files are read from the files located in the system network directory /usr/lib/systemd/network, the volatile runtime network directory /run/systemd/network and the local administration network directory /etc/systemd/network. All configuration files are collectively sorted and processed in lexical order, regardless of the directories in which they live. However, files with identical filenames replace each other. Files in /etc have the highest priority, files in /run take precedence over files with the same name in /usr/lib. This can be used to override a system-supplied configuration file with a local file if needed; a symlink in /etc with the same name as a configuration file in /usr/lib, pointing to /dev/null, disables the configuration file entirely. A virtual network device is only created if the [Match] section matches the current environment, or if the section is empty. The following keys are accepted: Host= Matches against the hostname or machine ID of the host. See ConditionHost= in systemd.unit5 for details. Virtualization= Checks whether the system is executed in a virtualized environment and optionally test whether it is a specific implementation. See ConditionVirtualization= in systemd.unit5 for details. KernelCommandLine= Checks whether a specific kernel command line option is set (or if prefixed with the exclamation mark unset). See ConditionKernelCommandLine= in systemd.unit5 for details. Architecture= Checks whether the system is running on a specific architecture. See ConditionArchitecture= in systemd.unit5 for details. The [NetDev] section accepts the following keys: Name= The interface name used when creating the netdev. This option is compulsory. Kind= The netdev kind. Currently, bridge, bond, vlan and macvlan are supported. This option is compulsory. The [VLAN] section only applies for netdevs of kind vlan, and accepts the following key: Id= The VLAN ID to use. An integer in the range 0–4094. This option is compulsory. The [MACVLAN] section only applies for netdevs of kind macvlan, and accepts the following key: Mode= The MACVLAN mode to use. The supported options are private, vepa, bridge and passthru. [NetDev] Name=bridge0 Kind=bridge [Match] Virtualization=no [NetDev] Name=vlan1 Kind=vlan [VLAN] Id=1 systemd1, systemd-networkd8, systemd.network5