136 lines
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HTML
136 lines
10 KiB
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<meta name="DC.Title" content="Timing parameters" />
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<meta name="abstract" content="You can make timing adjustments through the parameters of the Systems Network Architecture (SNA) controller description." />
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<title>Timing parameters</title>
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<body id="sna_over_atm_timing_issues"><a name="sna_over_atm_timing_issues"><!-- --></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">Timing parameters</h1>
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<div><p>You can make timing adjustments through the parameters of the Systems
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Network Architecture (SNA) controller description.</p>
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<p>SNA controller descriptions (advanced program-to-program communication
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(APPC), SNA host, remote workstation, finance, and retail) have parameters
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that describe the behavior of the station. The parameters can be used with
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all LAN protocols. The names of these parameters begin with the letters LAN.</p>
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<p>The table below shows the LAN parameters and their default values (see
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the *CALC column). You can view all parameter values with the Display Controller
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Description (DSPCTLD) command when the controller is varied on. You can find
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how a parameter affects your connection's performance by clicking on the link
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that is in the table below.</p>
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<div class="note"><span class="notetitle">Note:</span> Reducing a parameter's value gives you quicker error detection, but
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it also reduces the time for error recovery.</div>
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<p>To change these parameters, see <a href="rzajychangingtimingparameters.htm#changing_timing_parameters">Change timing parameters</a>.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" class="singleborder" frame="border" border="1" rules="all"><thead align="left"><tr valign="bottom"><th align="center" valign="bottom" width="25.185185185185183%" id="d0e30">Parameter</th>
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<th align="center" valign="bottom" width="54.629629629629626%" id="d0e32">Description</th>
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<th align="center" valign="bottom" width="20.185185185185187%" id="d0e34">*CALC value</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANCNNTMR</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN connection timer) The time to wait between
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requests to connect.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">7 seconds</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANCNNRTY</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN connection retry) The number of times
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to poll for request to connect.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">10</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANRSPTMR</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN response timer) The time to wait before
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retransmitting a frame.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">1 second</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANFRMRTY</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN frame retry) The number of times to
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retransmit a frame.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">10</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANACKTMR</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN acknowledge timer) The time to wait
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before sending an acknowledgment.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">0.1 seconds</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANACKFRQ</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN acknowledgment frequency) The number
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of frames to receive before sending an acknowledgment.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">1</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANINACTMR</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN inactivity timer) The time to wait before
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requesting a response from the remote station.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">10 seconds</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANMAXOUT</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN maximum outstanding) The number of outstanding
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frames allowed before requesting an acknowledgment from the remote station.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">2</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANWDWSTP</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN window step) An alternative to LANMAXOUT.
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Use LANWDWSTP to help alleviate network congestion.</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">*NONE</td>
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</tr>
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<tr><td align="left" valign="top" width="25.185185185185183%" headers="d0e30 ">LANACCPTY</td>
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<td align="left" valign="top" width="54.629629629629626%" headers="d0e32 ">(LAN access priority) The priority of the
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station. Stations with higher priority have greater access to the token. (Used
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for token-ring only.)</td>
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<td align="left" valign="top" width="20.185185185185187%" headers="d0e34 ">0</td>
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</tr>
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</tbody>
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</table>
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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">The LANCNNTMR and LANCNNRTY parameters</a></strong><br />
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Your Systems Network Architecture (SNA) controller description has two parameters: LAN connection timer (LANCNNTMR) and LAN connection retry (LANCNNRTY). They work together to 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">The LANRSPTMR and LANFRMRTY parameters</a></strong><br />
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In your Systems Network Architecture (SNA) controller description, the LAN response timer (LANRSPTMR) and the LAN frame retry (LANFRMRTY) parameters work together to determine how soon and how often the system retransmits a frame.</li>
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<li class="ulchildlink"><strong><a href="rzajylanacktmrandlanackfrq.htm">The LANACKTMR and LANACKFRQ parameters</a></strong><br />
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Your Systems Network Architecture (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">The LANINACTMR parameter</a></strong><br />
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The LAN inactivity timer (LANINACTMR) parameter of your Systems Network Architecture (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">The LANMAXOUT parameter</a></strong><br />
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The Maximum outstanding data frames (LANMAXOUT) parameter of your Systems Network Architecture (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">The LANWDWSTP parameter</a></strong><br />
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The LAN window step (LANWDWSTP) parameter of your Systems Network Architecture (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">The LANACCPTY parameter</a></strong><br />
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The LAN access priority (LANACCPTY) parameter of your Systems Network Architecture (SNA) controller description determines a token's priority.</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="rzajutuninglanperformance.htm" title="Timing parameters are related to LAN performance. You can perform timing adjustments to improve LAN performance.">Timing</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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