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 21<title>Chapter 8. Troubleshooting</title>
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 43<div class="titlepage"><div><div><h2 class="title">
 44<a name="Bv9ARM.ch08"></a>Chapter 8. Troubleshooting</h2></div></div></div>
 45<div class="toc">
 46<p><b>Table of Contents</b></p>
 47<dl>
 48<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603371">Common Problems</a></span></dt>
 49<dd><dl><dt><span class="sect2"><a href="Bv9ARM.ch08.html#id2603377">It's not working; how can I figure out what's wrong?</a></span></dt></dl></dd>
 50<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603388">Incrementing and Changing the Serial Number</a></span></dt>
 51<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603405">Where Can I Get Help?</a></span></dt>
 52</dl>
 53</div>
 54<div class="sect1" lang="en">
 55<div class="titlepage"><div><div><h2 class="title" style="clear: both">
 56<a name="id2603371"></a>Common Problems</h2></div></div></div>
 57<div class="sect2" lang="en">
 58<div class="titlepage"><div><div><h3 class="title">
 59<a name="id2603377"></a>It's not working; how can I figure out what's wrong?</h3></div></div></div>
 60<p>
 61            The best solution to solving installation and
 62            configuration issues is to take preventative measures by setting
 63            up logging files beforehand. The log files provide a
 64            source of hints and information that can be used to figure out
 65            what went wrong and how to fix the problem.
 66          </p>
 67</div>
 68</div>
 69<div class="sect1" lang="en">
 70<div class="titlepage"><div><div><h2 class="title" style="clear: both">
 71<a name="id2603388"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
 72<p>
 73          Zone serial numbers are just numbers &#8212; they aren't
 74          date related.  A lot of people set them to a number that
 75          represents a date, usually of the form YYYYMMDDRR.
 76          Occasionally they will make a mistake and set them to a
 77          "date in the future" then try to correct them by setting
 78          them to the "current date".  This causes problems because
 79          serial numbers are used to indicate that a zone has been
 80          updated.  If the serial number on the slave server is
 81          lower than the serial number on the master, the slave
 82          server will attempt to update its copy of the zone.
 83        </p>
 84<p>
 85          Setting the serial number to a lower number on the master
 86          server than the slave server means that the slave will not perform
 87          updates to its copy of the zone.
 88        </p>
 89<p>
 90          The solution to this is to add 2147483647 (2^31-1) to the
 91          number, reload the zone and make sure all slaves have updated to
 92          the new zone serial number, then reset the number to what you want
 93          it to be, and reload the zone again.
 94        </p>
 95</div>
 96<div class="sect1" lang="en">
 97<div class="titlepage"><div><div><h2 class="title" style="clear: both">
 98<a name="id2603405"></a>Where Can I Get Help?</h2></div></div></div>
 99<p>
100          The Internet Systems Consortium
101          (<acronym class="acronym">ISC</acronym>) offers a wide range
102          of support and service agreements for <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym> servers. Four
103          levels of premium support are available and each level includes
104          support for all <acronym class="acronym">ISC</acronym> programs,
105          significant discounts on products
106          and training, and a recognized priority on bug fixes and
107          non-funded feature requests. In addition, <acronym class="acronym">ISC</acronym> offers a standard
108          support agreement package which includes services ranging from bug
109          fix announcements to remote support. It also includes training in
110          <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym>.
111        </p>
112<p>
113          To discuss arrangements for support, contact
114          <a href="mailto:info@isc.org" target="_top">info@isc.org</a> or visit the
115          <acronym class="acronym">ISC</acronym> web page at
116          <a href="http://www.isc.org/services/support/" target="_top">http://www.isc.org/services/support/</a>
117          to read more.
118        </p>
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127<td width="20%" align="center"> </td>
128<td width="40%" align="right"> <a accesskey="n" href="Bv9ARM.ch09.html">Next</a>
129</td>
130</tr>
131<tr>
132<td width="40%" align="left" valign="top">Chapter 7. <acronym class="acronym">BIND</acronym> 9 Security Considerations </td>
133<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
134<td width="40%" align="right" valign="top"> Appendix A. Appendices</td>
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