<refsect1 id='service_discovery'>
    <title>SERVICE DISCOVERY</title>
    <para>
        The service discovery feature allows back ends to automatically
        find the appropriate servers to connect to using a special DNS
        query.
    </para>
    <refsect2 id='configuration'>
        <title>Configuration</title>
        <para>
            If no servers are specified, the back end automatically
            uses service discovery to try to find a server. Optionally,
            the user may choose to use both fixed server addresses
            and service discovery by inserting a special keyword,
            <quote>_srv_</quote>, in the list of servers. The order
            of preference is maintained. This feature is useful if, for
            example, the user prefers to use service discovery whenever
            possible, and fall back to a specific server when no servers
            can be discovered using DNS.
        </para>
    </refsect2>
    <refsect2 id='domain_name'>
        <title>The domain name</title>
        <para>
            Please refer to the <quote>dns_discovery_domain</quote>
            parameter in the
            <citerefentry>
                <refentrytitle>sssd.conf</refentrytitle>
                <manvolnum>5</manvolnum>
            </citerefentry>
            manual page for more details.
        </para>
    </refsect2>
    <refsect2 id='search_protocol'>
        <title>The protocol</title>
        <para>
            The queries usually specify _tcp as the protocol. Exceptions
            are documented in respective option description.
        </para>
    </refsect2>
    <refsect2 id='reference'>
        <title>See Also</title>
        <para>
            For more information on the service discovery mechanism,
            refer to RFC 2782.
        </para>
    </refsect2>
</refsect1>