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<title>Chapter 8. Troubleshooting</title>
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<div class="titlepage"><div><div><h2 class="title">
<a name="Bv9ARM.ch08"></a>Chapter 8. Troubleshooting</h2></div></div></div>
<div class="toc">
<p><b>Table of Contents</b></p>
<dl>
<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603371">Common Problems</a></span></dt>
<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>
<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603388">Incrementing and Changing the Serial Number</a></span></dt>
<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2603405">Where Can I Get Help?</a></span></dt>
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<div class="sect1" lang="en">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="id2603371"></a>Common Problems</h2></div></div></div>
<div class="sect2" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="id2603377"></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="sect1" lang="en">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="id2603388"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
<p>
Zone serial numbers are just numbers — 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="sect1" lang="en">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="id2603405"></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 href="mailto:info@isc.org" target="_top">info@isc.org</a> or visit the
<acronym class="acronym">ISC</acronym> web page at
<a href="http://www.isc.org/services/support/" target="_top">http://www.isc.org/services/support/</a>
to read more.
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<td width="40%" align="left" valign="top">Chapter 7. <acronym class="acronym">BIND</acronym> 9 Security Considerations </td>
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<td width="40%" align="right" valign="top"> Appendix A. Appendices</td>
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