84 lines
6.1 KiB
HTML
84 lines
6.1 KiB
HTML
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<meta name="DC.Title" content="LANMAXOUT" />
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<meta name="abstract" content="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." />
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<title>LANMAXOUT</title>
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</head>
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<body id="rzajylanmaxout"><a name="rzajylanmaxout"><!-- --></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">LANMAXOUT</h1>
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<div><p>The Maximum outstanding data frames (LANMAXOUT) parameter of your
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SNA controller description specifies how many frames your system sends before
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waiting to receive an acknowledgment.</p>
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<div class="section"> This parameter is highly sensitive to the remote station's speed
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to copy and acknowledge frames (speed is based on buffering capabilities and
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processing resource).<div class="note"><span class="notetitle">Note:</span> The LAN window step (LANWDWSTP) parameter can influence
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the number of outstanding frames.</div>
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<p>The default *CALC value for LANMAXOUT
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is 2.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Performance considerations</h4><p>For optimal
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performance, you must choose appropriate values for the LANMAXOUT and LANACKFRQ
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parameters on both the sending and receiving stations.</p>
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<p>These variables
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affect which LANMAXOUT and LANACKFRQ values provide the best performance:</p>
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<ul><li>The characteristics of the application.</li>
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<li>The amount of data sent.</li>
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<li>The rate that the application can present and accept data.</li>
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<li>The data blocking characteristics.</li>
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<li>The LAN adapter type.</li>
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<li>The processing unit model.</li>
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<li>The utilization of the line, the adapter, and the processing unit.</li>
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<li>The internal buffering capabilities.</li>
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</ul>
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<p>In most environments, the default value (*CALC) for LANACKFRQ and
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LANMAXOUT offer the best performance. However, for some environments, changing
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the values can improve performance significantly.</p>
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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="rzajylanrsptmrandlanfrmrty.htm" title="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.">LANRSPTMR and LANFRMRTY</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="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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</html>
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