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<h1 class="topictitle1">Troubleshoot PPP</h1>
<div><p>If you experience PPP connection problems, you can use this checklist
to gather error information. This checklist can help you identify
error symptoms and resolve PPP connection problems.</p>
<div class="section"><p>Current and relevant information about program temporary fixes
(PTFs) and troubleshooting is documented on the <a href="http://www.iseries.ibm.com/tcpip/" target="_blank">iSeries™ server
TCP/IP home page</a> <img src="www.gif" alt="Link outside Information Center" />. This link provides the latest information that
supplements and overrides the information that is contained in this topic.</p>
</div>
<div class="section"> <ol><li>Required supporting material: <ul><li>Remote host type, operating system, and level</li>
<li>iSeries server
host operating system level</li>
<li><img src="./delta.gif" alt="Start of change" />All output files that are saved in an output queue with the
same name as the profile<img src="./deltaend.gif" alt="End of change" /></li>
<li><img src="./delta.gif" alt="Start of change" />Job logs for QTPPPCTL and QTPPPL2TP (if an L2TP profile)<img src="./deltaend.gif" alt="End of change" /></li>
<li>Connection script, if used in your environment</li>
<li>Status of connection profile before and after the connection fails</li>
</ul>
</li>
<li>Recommended supporting material: <ul><li>Line description</li>
<li>Connection profile <p>Option 6 from WRKTCPPTP prints the profile settings.</p>
</li>
<li>Modem type and model</li>
<li>Modem command strings</li>
<li>Communications trace</li>
</ul>
</li>
</ol>
</div>
<div class="section"><p>The ITSO Redbook <a href="http://www.redbooks.ibm.com/abstracts/sg245190.html" target="_blank">TCP/IP for iSeries server: More Cool Things Than Ever (SG24-5190)</a> <img src="rbpdf.gif" alt="Link to PDF" /> covers the
following PPP problems. It also provides detailed problem resolution information.</p>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. PPP problems from ITSO Redbook</caption><thead align="left"><tr><th align="center" valign="top" id="d0e82">Problem</th>
<th align="center" valign="top" id="d0e84">Solution</th>
</tr>
</thead>
<tbody><tr><td valign="top" headers="d0e82 "><p><strong>Modem hardware configuration</strong></p>
<p>Wrong configuration
of dip-switches and other hardware settings</p>
</td>
<td valign="top" headers="d0e84 ">Make sure that the modem is configured for the correct
framing type. This can be either <em>Asynchronous</em> or <em>Synchronous</em>.
Refer to the modem manual for more information.</td>
</tr>
<tr><td valign="top" headers="d0e82 "><p><strong>Modem AT commands</strong></p>
<p>The modem you are
trying to use is not in the predefined list of modems in iSeries Navigator. </p>
</td>
<td valign="top" headers="d0e84 ">Create a new modem.</td>
</tr>
<tr><td valign="top" headers="d0e82 "><p><strong>PPP users and passwords</strong></p>
<p>You are getting
user name and password errors when attempting a PPP connection.</p>
</td>
<td valign="top" headers="d0e84 "><ul><li>Ensure that the user ID and password are entered using the same case.</li>
<li>Ensure that the authentication protocol used by the peers is the same.</li>
<li>Do not use PAP at one peer, while the other peer is configured as CHAP.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e82 "><p><strong>PPP lines for starting a connection profile</strong></p>
<p>Identified
PPP lines are used by the same hardware resource.</p>
</td>
<td valign="top" headers="d0e84 ">Remember to vary off other lines using the same hardware
resource.</td>
</tr>
<tr><td valign="top" headers="d0e82 "><p><strong>PPP protocol</strong></p>
<p>Connection errors can occur
due to misconfiguration of the PPP protocol.</p>
</td>
<td valign="top" headers="d0e84 ">Investigating the lower-levels of the PPP protocol may
be necessary in some situations where the peers are unable to communicate
with each other due to a configuration error. If the PPP log or the job log
of the PPP job does not show any indication of the problem, you can investigate
the problem by using the communications trace function. </td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiygetstart.htm" title="Point-to-Point Protocol (PPP) is an Internet standard for transmitting data over serial lines.">Remote Access Services: PPP connections</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzaiycfgmodem.htm" title="For your analog PPP connections, you can use an external modem, an internal modem or an ISDN terminal adapter. A modem provides you with analog connection capabilities (leased and switched lines). Modem descriptions for the most popular modems have been defined for the iSeries server.">Configure your modem for PPP</a></div>
<div><a href="rzaiyrzaiycfgmodem.htm" title="You can find how to configure a new modem in this topic.">Configure a new modem</a></div>
</div>
<div class="relref"><strong>Related reference</strong><br />
<div><a href="rzaiycfgref.htm" title="Listed here are IBM Redbooks (in PDF format) and Web sites that relate to the PPP topic. You can view or print any of the PDFs.">Related information for PPP</a></div>
</div>
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