systemd Developer Vinay Kulkarni kulkarniv@vmware.com networkd.conf 5 networkd.conf networkd.conf.d Global Network configuration files /etc/systemd/networkd.conf /etc/systemd/networkd.conf.d/*.conf /usr/lib/systemd/networkd.conf.d/*.conf These configuration files control global network parameters. For e.g. DHCP Unique Identifier (DUID). This section configures the DUID value used by the DHCP protocol. The DUID value specified here overrides the DUID that systemd-networkd generates using the machine-id from the /etc/machine-id file. The configured DHCP DUID should conform to the specification in RFC 3315, RFC 6355. To configure IAID, see systemd.network5 . The following options are available in [DUID] section: Type= The type of DUID specified in this section. The following values are supported: raw : If Type=raw, then RawData= specifies the entire DUID. For e.g: RawData=00:02:00:00:ab:11:f9:2a:c2:77:29:f9:5c:00 specifies a 14 byte long DUID-EN ("00:02"), with enterprise number 43793 ("00:00:ab:11"), and identifier value "f9:2a:c2:77:29:f9:5c:00". RawData= Specifies the DUID bytes as a single newline-terminated, hexadecimal string, with each byte separated by a ':'. systemd1, systemd.network5, machine-id1