<para>Virtual Network Device files must have the extension
<filename>.netdev</filename>; other extensions are ignored. Virtual
- network devices are created as soon as networkd is started.</para>
+ network devices are created as soon as networkd is started. If a netdev
+ with the specified name already exists, networkd will use that as-is
+ rather than create its own. Note that the settings of the pre-existing
+ netdev will not be changed by networkd.</para>
<para>The <filename>.netdev</filename> files are read from the files located in the
system network directory <filename>/usr/lib/systemd/network</filename>,
<literal>macvlan</literal>, <literal>vxlan</literal>,
<literal>ipip</literal>, <literal>gre</literal>,
<literal>sit</literal>, <literal>vti</literal>,
- <literal>veth</literal>, and <literal>dummy</literal>
+ <literal>veth</literal>, <literal>tun</literal>,
+ <literal>tap</literal> and <literal>dummy</literal>
are supported. This option is compulsory.</para>
</listitem>
</varlistentry>
<literal>[Tun]</literal> section.</para>
</refsect1>
+ <refsect1>
+ <title>[Bond] Section Options</title>
+
+ <para>The <literal>[Bond]</literal> section accepts the following
+ key:</para>
+
+ <variablelist class='network-directives'>
+ <varlistentry>
+ <term><varname>Mode=</varname></term>
+ <listitem>
+ <para>Specifies one of the bonding policies. The default is balance-rr (round robin).
+ <literal>balance-rr</literal>
+ <literal>active-backup</literal>
+ <literal>balance-xor</literal>
+ <literal>broadcast</literal>
+ <literal>802.3ad</literal>
+ <literal>balance-tlb</literal>
+ <literal>balance-alb</literal>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>Example</title>
<example>