79 lines
4.6 KiB
HTML
79 lines
4.6 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
||
|
|
<meta name="DC.Type" content="task" />
|
||
|
|
<meta name="DC.Title" content="Verify Domain Name System function with Name Server Lookup" />
|
||
|
|
<meta name="abstract" content="You can use Name Server Lookup (NSLookup) to verify that Domain Name System (DNS) is working." />
|
||
|
|
<meta name="description" content="You can use Name Server Lookup (NSLookup) to verify that Domain Name System (DNS) is working." />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rzakkmanaging.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="rzakkmanagingverify" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Verify Domain Name System function with Name Server Lookup</title>
|
||
|
|
</head>
|
||
|
|
<body id="rzakkmanagingverify"><a name="rzakkmanagingverify"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Verify Domain Name System function with Name Server Lookup</h1>
|
||
|
|
<div><p>You can use Name Server Lookup (NSLookup) to verify that Domain
|
||
|
|
Name System (DNS) is working.</p>
|
||
|
|
<div class="section"><p>Use NSLookup to query the DNS server for an IP address. This verifies
|
||
|
|
that the DNS server is responding to queries. Request the host name that is
|
||
|
|
associated with the loopback IP address (127.0.0.1). It should respond with
|
||
|
|
the host name (localhost). You should also query specific names that are defined
|
||
|
|
in the server instance that you are trying to verify. This will confirm that
|
||
|
|
the specific server instance you are testing is functioning properly.</p>
|
||
|
|
<p>To
|
||
|
|
verify DNS function with NSLookup, follow these steps:</p>
|
||
|
|
</div>
|
||
|
|
<ol><li class="stepexpand"><span>At the command line, type <kbd class="userinput">NSLOOKUP DMNNAMSVR(n.n.n.n)</kbd>,
|
||
|
|
where n.n.n.n is an address that you have configured the server instance you
|
||
|
|
are testing to listen on.</span></li>
|
||
|
|
<li class="stepexpand"><span>At the command line, type <kbd class="userinput">NSLOOKUP</kbd> and press
|
||
|
|
Enter. This starts an NSLookup query session.</span></li>
|
||
|
|
<li class="stepexpand"><span>Type <kbd class="userinput">server</kbd> followed by your server name
|
||
|
|
and press Enter. For example: <samp class="codeph">server myiseries.mycompany.com</samp>.
|
||
|
|
This information displays: </span> <pre> Server: myiseries.mycompany.com
|
||
|
|
Address: n.n.n.n</pre>
|
||
|
|
Where <samp class="codeph">n.n.n.n</samp> represents your DNS server's IP
|
||
|
|
address.</li>
|
||
|
|
<li class="stepexpand"><span>Enter <kbd class="userinput">127.0.0.1</kbd> on the command line and
|
||
|
|
press Enter. </span> <p>This information should display, including the
|
||
|
|
loopback host name:</p>
|
||
|
|
<pre> > 127.0.0.1
|
||
|
|
Server: myiseries.mycompany.com
|
||
|
|
Address: n.n.n.n
|
||
|
|
|
||
|
|
|
||
|
|
<span class="uicontrol">Name: localhost</span>
|
||
|
|
Address: 127.0.0.1 </pre>
|
||
|
|
<p>The DNS server is responding correctly if it returns the loopback
|
||
|
|
host name: <span class="uicontrol">localhost</span>.</p>
|
||
|
|
</li>
|
||
|
|
<li class="stepexpand"><span>Type <kbd class="userinput">exit</kbd> and press Enter to quit the NSLOOKUP
|
||
|
|
terminal session.</span></li>
|
||
|
|
</ol>
|
||
|
|
<div class="section"><div class="note"><span class="notetitle">Note:</span> If you need help using NSLookup, type <kbd class="userinput">?</kbd> and
|
||
|
|
press Enter.</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakkmanaging.htm" title="This topic discusses how to verify Domain Name System (DNS) function, monitor performance, and maintain DNS data and files.">Manage Domain Name System</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|