78 lines
5.8 KiB
HTML
78 lines
5.8 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Troubleshoot Domain Name System" />
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<meta name="abstract" content="This topic explains Domain Name System (DNS) logging and debugging settings that can help you resolve problems with your DNS server." />
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<meta name="description" content="This topic explains Domain Name System (DNS) logging and debugging settings that can help you resolve problems with your DNS server." />
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<meta name="DC.Relation" scheme="URI" content="rzakklogging.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzakktroubleshootingdebug.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzakklogging.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzakktroubleshootingdebug.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Troubleshoot Domain Name System</title>
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</head>
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<body id="rzakktroubleshooting"><a name="rzakktroubleshooting"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Troubleshoot Domain Name System</h1>
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<div><p>This topic explains Domain Name System (DNS) logging and debugging
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settings that can help you resolve problems with your DNS server.</p>
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<p>DNS operates much the same as other TCP/IP functions and applications.
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Like SMTP or FTP applications, DNS jobs run under the QSYSWRK subsystem and
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produce job logs under the user profile QTCP with information associated with
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the DNS job. If a DNS job ends, you can use the job logs to determine the
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cause. If the DNS server is not returning the expected responses, the job
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logs might contain information that can help with problem analysis.</p>
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<p>The DNS configuration consists of several files with several different
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types of records in each file. Problems with the DNS server are generally
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the result of incorrect entries in the DNS configuration files. When a problem
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occurs, verify that the DNS configuration files contain the entries you expect.</p>
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<div class="section"><h4 class="sectiontitle">Identify jobs</h4><p>If you look in the job log to verify
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DNS server function (using WRKACTJOB, for example), consider the following
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naming guidelines:</p>
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<ul><li>If you are using BIND 4.9.3, the job name of the server will be QTOBDNS.
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For more information about debugging DNS 4.9.3, refer to <em><a href="http://publib.boulder.ibm.com/pubs/html/as400/v4r5/ic2924/info/RZAISTRDNSSV.HTM" target="_blank">Troubleshooting DNS servers</a></em>.</li>
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<li>If you are running servers based on BIND 8, there will be a separate job
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for each server instance you are running. The job name is 5 fixed chars (QTOBD)
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followed by the instance name. For example, if you have two instances, INST1
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and INST2, their job names will be QTOBDINST1 and QTOBDINST2.</li>
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</ul>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzakklogging.htm">Logging Domain Name System server messages</a></strong><br />
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Domain Name System (DNS) provides numerous logging options that can be adjusted when you are trying to find the source of a problem. Logging provides flexibility by offering various severity levels, message categories, and output files so that you can fine-tune logging to help you find problems.</li>
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<li class="ulchildlink"><strong><a href="rzakktroubleshootingdebug.htm">Change Domain Name System debug settings</a></strong><br />
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The Domain Name System (DNS) debug function can provide information that can help you determine and correct DNS server problems.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakkkickoff.htm" title="Domain Name System (DNS) is a distributed database system for managing host names and their associated Internet Protocol (IP) addresses.">Domain Name System</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzakklogging.htm" title="Domain Name System (DNS) provides numerous logging options that can be adjusted when you are trying to find the source of a problem. Logging provides flexibility by offering various severity levels, message categories, and output files so that you can fine-tune logging to help you find problems.">Logging Domain Name System server messages</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzakktroubleshootingdebug.htm" title="The Domain Name System (DNS) debug function can provide information that can help you determine and correct DNS server problems.">Change Domain Name System debug settings</a></div>
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</div>
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</div>
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</body>
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</html>
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