<cmdsynopsis>
<command>&dhpackage;</command>
<arg choice="plain"><option>-l <replaceable>host</replaceable></option></arg>
+ <arg>port</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<listitem>
<para>The TCP port on which <command>nbd-server</command> is
running at the server.</para>
- <para>This option is required, unless the -N option is
- specified.</para>
- <para>When a port is specified, nbd-client uses the oldstyle
- protocol to connect to the server. This version of the
- protocol is being deprecated.</para>
+ <para>For the deprecated oldstyle protocol, passing a port
+ number is required. In the oldstyle protocol, exports are
+ defined by the port on which they are running.</para>
+ <para>For the newstyle protocol, the port number defaults to
+ 10809, the IANA-assigned port number for the NBD protocol.
+ The newstyle protocol is selected automatically by
+ nbd-client when one of the -list or -name options are
+ used.</para>
</listitem>
</varlistentry>
<varlistentry>