<chapter>

<title>Troubleshooting</title>

<sect1>

<title>Common Problems</title>

<sect2>

<title>It's not working; how can I figure out what's wrong?</title>

<para>The best solution to solving installation and

configuration issues is to take preventative measures by setting

up logging files beforehand (see the sample configurations in

<xref linkend="sample_configuration"/>). 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.</para>

</sect2>

</sect1>

<sect1>

<title>Incrementing and Changing the Serial Number</title>

<para>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. A number of people have been

testing these numbers for Y2K compliance and have set the number

to the year 2000 to see if it will work. They then try to restore

the old serial number. This will cause 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.</para>

<para>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.</para>

<para>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.</para>

</sect1>

<sect1>

<title>Where Can I Get Help?</title>

<para>The Internet Software Consortium (<acronym>ISC</acronym>) offers a wide range

of support and service agreements for <acronym>BIND</acronym> and <acronym>DHCP</acronym> servers. Four

levels of premium support are available and each level includes

support for all <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>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>BIND</acronym> and <acronym>DHCP</acronym>.</para>

<para>To discuss arrangements for support, contact

<ulink url="email:info@isc.org">info@isc.org</ulink> or visit the

<acronym>ISC</acronym> web page at <ulink

url="http://www.isc.org/services/support/">http://www.isc.org/services/support/</ulink>

to read more.</para>

</sect1>

</chapter>