104 lines
6.5 KiB
HTML
104 lines
6.5 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="task" />
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<meta name="DC.Title" content="Ping the loopback interface on your server" />
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<meta name="abstract" content="Ping the loopback interface to verify that your TCP/IP software is installed and working properly." />
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<meta name="description" content="Ping the loopback interface to verify that your TCP/IP software is installed and working properly." />
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<meta name="DC.Relation" scheme="URI" content="rzakupingiseriesnav.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1997, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1997, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="pingloopbacknav" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Ping the loopback interface on your server</title>
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</head>
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<body id="pingloopbacknav"><a name="pingloopbacknav"><!-- --></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">Ping the loopback interface on your server</h1>
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<div><p>Ping the loopback interface to verify that your TCP/IP software
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is installed and working properly.</p>
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<div class="section"><p>You can perform the test without being connected to a physical
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line or network.</p>
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<p>i5/OS™ reserves the IP address 127.0.0.1,
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the host name LOOPBACK, and the line description value of *LOOPBACK for verifying
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the software. Similarly for IPv6, i5/OS reserves the IP address ::1 and the
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line description <span>*LOOPBACK</span> for this purpose. The IPv6
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loopback interface does not have a corresponding host name because the local
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host tables do not currently support IPv6 addresses. However, you can use
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a Domain Name System (DNS) to store the IPv6 host name instead of using the
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local host table.</p>
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<p>To ping the loopback interface on your server to troubleshoot
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the problem, follow these steps:</p>
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</div>
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<ol><li><span>In iSeries™ Navigator,
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expand your <span class="menucascade"><span class="uicontrol">iSeries server</span> > <span class="uicontrol"> Network</span></span>.</span></li>
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<li><span>Right-click <span class="uicontrol">TCP/IP Configuration</span>, and select <span class="menucascade"><span class="uicontrol">Utilities</span> > <span class="uicontrol"> Ping</span></span>.</span></li>
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<li><span>Specify the loopback interface IP address or host name. If you
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are testing by using the host name, you must select the Protocol for host
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names. </span></li>
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<li><span>Click <span class="uicontrol">Ping Now</span> to send the Ping. View the
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responses to your Ping in the list of results.</span></li>
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<li><span>Failures might indicate these problems:</span>
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<table border="1" frame="hsides" rules="rows" cellpadding="4" cellspacing="0" summary="" class="choicetableborder">
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<thead><tr><th valign="bottom" align="left" id="d0e67-option">Problem</th>
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<th valign="bottom" align="left" id="d0e67-desc">Recovery</th></tr></thead>
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<tbody><tr><td valign="top" headers="d0e67-option" id="d0e74"><strong>The local host table does not have an entry for the LOOPBACK
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host name and IP address of 127.0.0.1.</strong></td>
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<td valign="top" headers="d0e67-desc d0e74">Add the entry to
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the host table. This is only relevant for IPv4 because host tables do not
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currently support IPv6. To verify the host table entries, follow these steps:<ol type="a"><li>In iSeries Navigator,
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expand your <span class="menucascade"><span class="uicontrol">iSeries server</span> > <span class="uicontrol"> Network</span></span>.</li>
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<li>Right-click <span class="uicontrol">TCP/IP Configuration</span> and select <span class="uicontrol">Host
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Table</span>.</li>
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<li>Verify that the host table contains an entry for the LOOPBACK host name
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and IP address 127.0.0.1.</li>
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</ol>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e67-option" id="d0e101"><strong>The loopback interface is not active.</strong></td>
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<td valign="top" headers="d0e67-desc d0e101">To
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activate the loopback interface: <ul><li>For IPv4: <ol type="a"><li>In iSeries Navigator,
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expand your <span class="menucascade"><span class="uicontrol">iSeries server</span> > <span class="uicontrol"> Network</span> > <span class="uicontrol"> TCP/IP Configuration</span> > <span class="uicontrol"> IPv4</span> > <span class="uicontrol"> Interfaces</span></span>.</li>
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<li>In the right pane, right-click the loopback interface (127.0.0.1) and
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select <span class="uicontrol">Start</span>.</li>
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</ol>
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</li>
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<li>For IPv6: <ol type="a"><li>In iSeries Navigator,
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expand your <span class="menucascade"><span class="uicontrol">Series server</span> > <span class="uicontrol"> Network</span> > <span class="uicontrol"> TCP/IP Configuration</span> > <span class="uicontrol"> IPv6</span> > <span class="uicontrol"> Interfaces</span></span>.</li>
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<li>In the right pane, right-click the loopback interface (::1) and select <span class="uicontrol">Start</span>.</li>
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</ol>
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</li>
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</ul>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e67-option" id="d0e157"><strong>TCP/IP has not been started.</strong></td>
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<td valign="top" headers="d0e67-desc d0e157">Start TCP/IP.</td>
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</tr>
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</tbody></table>
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</li>
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</ol>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakupingiseriesnav.htm" title="You can use Ping from iSeries Navigator to test your TCP/IP connectivity.">Ping from iSeries Navigator</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rzakupingerrors.htm" title="Use these common error messages to find out how to resolve the errors.">Common error messages</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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