84 lines
4.9 KiB
HTML
84 lines
4.9 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" 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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<meta name="dc.date" scheme="iso8601" content="2005-10-03" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Considerations for the CMNRCYLMT parameter that can affect error recovery</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzahjerr-concmnrcylmtin"></a>
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<h5 id="rzahjerr-concmnrcylmtin">Considerations for the CMNRCYLMT parameter that can affect error recovery</h5>
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<p>The QCMNRCYLMT system value or the recovery limits (CMNRCYLMT) parameter
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on the configuration object controls automatic communications error recovery.
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The CMNRCYLMT parameter is on the CHGCTLxxx, CHGLINxxx, CHGNWIxxx, CRTCTLxxx,
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CRTLINxxx, or CRTNWIxxx commands. These parameter values contain two related
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numbers that you can set: </p>
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<ul>
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<li>The number of second-level recovery attempts automatically performed by
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the system (count limit)</li>
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<li>The length of time (time interval) in which the specified number of second-level
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recoveries can occur.</li></ul><p class="indatacontent"> The default value on CMNRCYLMT on lines and controllers is two retries
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within 5 minutes (2 5).</p>
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<p>To configure the CMNRCYLMT parameter, consider the following:</p>
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<ul>
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<li>If automatic communication fails for personal computers on a local area
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network (LAN); and the iSeries™ attempts to recover the connection, this places
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unnecessary work on the system.
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<a name="wq55"></a>
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<div class="notetitle" id="wq55">Note:</div>
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<div class="notebody">If automatic communications
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error recovery is not used, manual recovery is necessary, that requires operator
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intervention. A good compromise is to set the automatic recovery limits to
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just one retry.</div></li>
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<li>Use a count limit 0 and a time interval of more than 0 to turn off second-level
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error recovery. Turning off second-level recovery may cause the devices and
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controllers to go into recovery pending (RCYPND) state. A message is sent
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to QSYSOPR, or the configured message queue, that requires operator intervention.
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Use manual recovery to either respond to the message in QSYSOPR, or the configured
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message queue, or vary the objects off and back on.
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<a name="wq56"></a>
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<div class="notetitle" id="wq56">Note:</div>
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<div class="notebody">First-level
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error recovery is still done. On a LAN, the Inactivity Timer is used to determine
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if the remote system is still available. Once the inactivity time expires,
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first-level error recovery is driven by the LANFRMRTY parameter and the LANRSPTMR
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parameter.</div></li>
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<li>Write applications that can determine if a failure has occurred, and then
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handle the errors.
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<ul>
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<li>Monitor the error messages in QSYSOPR, or the configured message queue,
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when they occur and handle the condition.</li>
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<li>Monitor the status of the configuration objects by using Retrieve Configuration
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Status (QDCRCFGS) and List Configuration Descriptions (QDCLCFGD) application
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programming interfaces (API).</li></ul></li></ul>
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<p>See the following references for more detail:</p>
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<ul>
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<li>For advanced configuration pages, see the <a href="../books/c4154010.pdf" target="_blank">Communications Configuration</a> book.
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<img src="wbpdf.gif" alt="Link to PDF" /></li>
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<li>For more information about iSeries communications, see the <a href="../books/sc415406.pdf" target="_blank">Communications Management</a>
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<img src="wbpdf.gif" alt="Link to PDF" /> book.</li></ul>
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<p>For related information, see: </p>
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<ul>
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<li><a href="rzahjerrconswtdscinsts.htm#rzahjerr-conswtdscinsts">Considerations for the SWTDSC parameter that can affect error recovery</a></li>
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<li><a href="rzahjerrcomsysvalref.htm#rzahjerr-comsysvalref">Considerations for communications-related system values</a></li></ul>
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</body>
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</html>
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