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+<html lang="en">
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>Chapter 8. Troubleshooting</title>
+<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
+<link rel="home" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
+<link rel="up" href="Bv9ARM.html" title="BIND 9 Administrator Reference Manual">
+<link rel="prev" href="Bv9ARM.ch07.html" title="Chapter 7. BIND 9 Security Considerations">
+<link rel="next" href="Bv9ARM.ch09.html" title="Appendix A. Release Notes">
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+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
+<div class="navheader">
+<table width="100%" summary="Navigation header">
+<tr><th colspan="3" align="center">Chapter 8. Troubleshooting</th></tr>
+<tr>
+<td width="20%" align="left">
+<a accesskey="p" href="Bv9ARM.ch07.html">Prev</a> </td>
+<th width="60%" align="center"> </th>
+<td width="20%" align="right"> <a accesskey="n" href="Bv9ARM.ch09.html">Next</a>
+</td>
+</tr>
+</table>
+<hr>
+</div>
+<div class="chapter">
+<div class="titlepage"><div><div><h1 class="title">
+<a name="Bv9ARM.ch08"></a>Chapter 8. Troubleshooting</h1></div></div></div>
+<div class="toc">
+<p><b>Table of Contents</b></p>
+<dl class="toc">
+<dt><span class="section"><a href="Bv9ARM.ch08.html#common_problems">Common Problems</a></span></dt>
+<dd><dl><dt><span class="section"><a href="Bv9ARM.ch08.html#id-1.9.2.2">It's not working; how can I figure out what's wrong?</a></span></dt></dl></dd>
+<dt><span class="section"><a href="Bv9ARM.ch08.html#id-1.9.3">Incrementing and Changing the Serial Number</a></span></dt>
+<dt><span class="section"><a href="Bv9ARM.ch08.html#more_help">Where Can I Get Help?</a></span></dt>
+</dl>
+</div>
+
+ <div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="common_problems"></a>Common Problems</h2></div></div></div>
+
+ <div class="section">
+<div class="titlepage"><div><div><h3 class="title">
+<a name="id-1.9.2.2"></a>It's not working; how can I figure out what's wrong?</h3></div></div></div>
+
+ <p>
+ The best solution to solving installation and
+ configuration issues is to take preventative measures by setting
+ up logging files beforehand. The log files provide a
+ source of hints and information that can be used to figure out
+ what went wrong and how to fix the problem.
+ </p>
+
+ </div>
+ </div>
+ <div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="id-1.9.3"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
+
+ <p>
+ Zone serial numbers are just numbers &#8212; they aren't
+ date related. A lot of people set them to a number that
+ represents a date, usually of the form YYYYMMDDRR.
+ Occasionally they will make a mistake and set them to a
+ "date in the future" then try to correct them by setting
+ them to the "current date". This causes problems because
+ serial numbers are used to indicate that a zone has been
+ updated. If the serial number on the slave server is
+ lower than the serial number on the master, the slave
+ server will attempt to update its copy of the zone.
+ </p>
+
+ <p>
+ Setting the serial number to a lower number on the master
+ server than the slave server means that the slave will not perform
+ updates to its copy of the zone.
+ </p>
+
+ <p>
+ The solution to this is to add 2147483647 (2^31-1) to the
+ number, reload the zone and make sure all slaves have updated to
+ the new zone serial number, then reset the number to what you want
+ it to be, and reload the zone again.
+ </p>
+
+ </div>
+ <div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="more_help"></a>Where Can I Get Help?</h2></div></div></div>
+
+ <p>
+ The Internet Systems Consortium
+ (<acronym class="acronym">ISC</acronym>) offers a wide range
+ of support and service agreements for <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym> servers. Four
+ levels of premium support are available and each level includes
+ support for all <acronym class="acronym">ISC</acronym> programs,
+ significant discounts on products
+ and training, and a recognized priority on bug fixes and
+ non-funded feature requests. In addition, <acronym class="acronym">ISC</acronym> offers a standard
+ support agreement package which includes services ranging from bug
+ fix announcements to remote support. It also includes training in
+ <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym>.
+ </p>
+
+ <p>
+ To discuss arrangements for support, contact
+ <a class="link" href="mailto:info@isc.org" target="_top">info@isc.org</a> or visit the
+ <acronym class="acronym">ISC</acronym> web page at
+ <a class="link" href="http://www.isc.org/services/support/" target="_top">http://www.isc.org/services/support/</a>
+ to read more.
+ </p>
+ </div>
+ </div>
+<div class="navfooter">
+<hr>
+<table width="100%" summary="Navigation footer">
+<tr>
+<td width="40%" align="left">
+<a accesskey="p" href="Bv9ARM.ch07.html">Prev</a> </td>
+<td width="20%" align="center"> </td>
+<td width="40%" align="right"> <a accesskey="n" href="Bv9ARM.ch09.html">Next</a>
+</td>
+</tr>
+<tr>
+<td width="40%" align="left" valign="top">Chapter 7. <acronym class="acronym">BIND</acronym> 9 Security Considerations </td>
+<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
+<td width="40%" align="right" valign="top"> Appendix A. Release Notes</td>
+</tr>
+</table>
+</div>
+<p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.11.5-P4 (Extended Support Version)</p>
+</body>
+</html>