86 lines
6.4 KiB
HTML
86 lines
6.4 KiB
HTML
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<title>LANRSPTMR and LANFRMRTY</title>
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</head>
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<body id="rzajylanrsptmrandlanfrmrty"><a name="rzajylanrsptmrandlanfrmrty"><!-- --></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">LANRSPTMR and LANFRMRTY</h1>
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<div><p>The LAN response timer (LANRSPTMR) and the LAN frame retry (LANFRMRTY)
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parameters in your controller description determine how soon and how often
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the system retransmits a frame.</p>
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<div class="section"><p>LANRSPTMR defines how long to wait before retransmitting a frame
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to the remote station. LANFRMRTY specifies how many times to retransmit a
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frame. A system retransmits a frame when one of the following occurs:</p>
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<ul><li>A frame was lost or damaged.</li>
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<li>The remote station does not respond because it is busy.</li>
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<li>The remote station is waiting to acknowledge the frame with an information
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frame of its own. (See LANACKTMR and LANACKFRQ for more information
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about the acknowledge timer).</li>
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</ul>
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<p>After your system retransmits a frame a number of times (based on
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the number that is indicated by the LANFRMRTY parameter), the system notifies
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the user that an error occurred and disconnects itself from the remote station.</p>
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<p>The
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default *CALC value for LANRSPTMR is 1 second. The default *CALC value for
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LANFRMRTY is 10.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Performance considerations:</h4><p>The default values of
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the parameters are designed for a single LAN and can cause too many frame
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retransmissions when accessing a remote station through a remote bridge. The
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bridge might slow data traffic enough that your retransmit timer expires before
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the remote station's acknowledgment reaches you. Eventually, your system will
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automatically disconnect itself because it retransmitted a frame too many
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times. If this is the case, you should increase the values of LANRSPTMR and
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LANFRMRTY.</p>
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<div class="note"><span class="notetitle">Note:</span> If you make the parameter values too large, your connection
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failure notices can be delayed.</div>
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</div>
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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="rzajysnaoveratmtimingissues.htm">SNA over Ethernet timing parameters</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="rzajychangingtimingparameters.htm" title="Do these steps to change the LAN timing parameters.">Changing timing parameters</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="rzajylancnntmrandlancnnrty.htm" title="The LAN connection timer (LANCNNTMR) and LAN connection retry (LANCNNRTY) parameters of your controller description define the frequency and persistence of polling the remote station to establish a connection">LANCNNTMR and LANCNNRTY</a></div>
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<div><a href="rzajylanacktmrandlanackfrq.htm" title="Your SNA controller description includes the LAN acknowledgment timer (LANACKTMR) and the LAN acknowledgment frequency (LANACKFRQ) parameters. They work together to determine how often to send an acknowledgment to the remote station.">LANACKTMR and LANACKFRQ</a></div>
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<div><a href="rzajylaninactmr.htm" title="The LAN inactivity timer (LANINACTMR) parameter of your SNA controller description determines how long your system waits before requesting a response from the remote station. Your system uses the request to test if the remote station is still accessible.">LANINACTMR</a></div>
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<div><a href="rzajylanmaxout.htm" title="The Maximum outstanding data frames (LANMAXOUT) parameter of your SNA controller description specifies how many frames your system sends before waiting to receive an acknowledgment.">LANMAXOUT</a></div>
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<div><a href="rzajylanwdwstp.htm" title="The LAN window step (LANWDWSTP) parameter of your SNA controller description determines whether the number of outstanding frames are reduced during network congestion.">LANWDWSTP</a></div>
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<div><a href="rzajylanaccpty.htm" title="The LAN access priority (LANACCPTY) parameter of your SNA controller description determines a token's priority.">LANACCPTY</a></div>
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</div>
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</div>
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</body>
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