
If ID_NET_MANAGED_BY= attribute is set, we have an indication who is responsible for the device. If this is set to anything but "org.freedesktop.NetworkManager", then the device is unmanaged. The effect is the same as setting NM_UNMANAGED= attribute. NM_UNMANAGED= takes precedence over this setting. See-also: https://github.com/systemd/systemd/issues/29768 See-also: https://github.com/systemd/systemd/pull/29782