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a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<title>Chapter�8.�Troubleshooting</title>
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a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster</div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="chapter" lang="en">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="titlepage"><div><div><h2 class="title">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<a name="Bv9ARM.ch08"></a>Chapter�8.�Troubleshooting</h2></div></div></div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="toc">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<p><b>Table of Contents</b></p>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<dl>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2609489">Common Problems</a></span></dt>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<dd><dl><dt><span class="sect2"><a href="Bv9ARM.ch08.html#id2609630">It's not working; how can I figure out what's wrong?</a></span></dt></dl></dd>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2609642">Incrementing and Changing the Serial Number</a></span></dt>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2609659">Where Can I Get Help?</a></span></dt>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster</dl>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster</div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="sect1" lang="en">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="titlepage"><div><div><h2 class="title" style="clear: both">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<a name="id2609489"></a>Common Problems</h2></div></div></div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="sect2" lang="en">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="titlepage"><div><div><h3 class="title">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<a name="id2609630"></a>It's not working; how can I figure out what's wrong?</h3></div></div></div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<p>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster The best solution to solving installation and
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster configuration issues is to take preventative measures by setting
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster up logging files beforehand. The log files provide a
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster source of hints and information that can be used to figure out
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster what went wrong and how to fix the problem.
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster </p>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster</div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster</div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="sect1" lang="en">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<div class="titlepage"><div><div><h2 class="title" style="clear: both">
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<a name="id2609642"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster<p>
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster Zone serial numbers are just numbers &#8212; they aren't
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster date related. A lot of people set them to a number that
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster represents a date, usually of the form YYYYMMDDRR.
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster Occasionally they will make a mistake and set them to a
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster "date in the future" then try to correct them by setting
a688bcbb4bcff5398fdd29b86f83450257dc0df4Allan Foster 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="id2609659"></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.
</p>
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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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