81 lines
5.9 KiB
HTML
81 lines
5.9 KiB
HTML
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<title>SNA over Ethernet timing parameters</title>
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<body id="rzajysnaoveratmtimingissues"><a name="rzajysnaoveratmtimingissues"><!-- --></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">SNA over Ethernet timing parameters</h1>
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<div><div class="section"><p>SNA over Ethernet networks have parameters that control timing.
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You can make the adjustments through the parameters of the SNA controller
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description.</p>
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<p>SNA controller descriptions (advanced program-to-program
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communications (APPC), SNA host, remote workstation, finance, and retail)
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have parameters that describe the behavior of the station. The parameters
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can be used with all LAN protocols. The names of these parameters begin with
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the letters LAN.</p>
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<p>The following is a list of the LAN parameters. See
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the LAN parameters to find how it affects your connection's performance. You
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can view all parameter values with the Display Controller Description (DSPCTLD)
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command when the controller is varied on. </p>
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<div class="note"><span class="notetitle">Note:</span> Reducing a parameter's
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value gives you quicker error detection, but it also reduces the time for
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error recovery.</div>
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<p>To learn about these parameters and how to change
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them, see the following information:</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzajylancnntmrandlancnnrty.htm">LANCNNTMR and LANCNNRTY</a></strong><br />
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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</li>
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<li class="ulchildlink"><strong><a href="rzajylanrsptmrandlanfrmrty.htm">LANRSPTMR and LANFRMRTY</a></strong><br />
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The LAN response timer (LANRSPTMR) and the LAN frame retry (LANFRMRTY) parameters in your controller description determine how soon and how often the system retransmits a frame.</li>
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<li class="ulchildlink"><strong><a href="rzajylanacktmrandlanackfrq.htm">LANACKTMR and LANACKFRQ</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rzajylaninactmr.htm">LANINACTMR</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rzajylanmaxout.htm">LANMAXOUT</a></strong><br />
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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.</li>
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<li class="ulchildlink"><strong><a href="rzajylanwdwstp.htm">LANWDWSTP</a></strong><br />
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The LAN window step (LANWDWSTP) parameter of your SNA controller description determines whether the number of outstanding frames are reduced during network congestion.</li>
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<li class="ulchildlink"><strong><a href="rzajylanaccpty.htm">LANACCPTY</a></strong><br />
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The LAN access priority (LANACCPTY) parameter of your SNA controller description determines a token's priority.</li>
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<li class="ulchildlink"><strong><a href="rzajychangingtimingparameters.htm">Changing timing parameters</a></strong><br />
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Do these steps to change the LAN timing parameters.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajytuningethernetperformance.htm" title="You can tune an Ethernet network's performance by adjusting the parameters that control its behavior.">Tune Ethernet performance</a></div>
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</div>
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</div>
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