81 lines
5.4 KiB
HTML
81 lines
5.4 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="concept" />
|
|
<meta name="DC.Title" content="LAN device connection initiation" />
|
|
<meta name="abstract" content="In an SNA environment you can determine which server initiates the connection request and which server waits for an incoming connection request." />
|
|
<meta name="description" content="In an SNA environment you can determine which server initiates the connection request and which server waits for an incoming connection request." />
|
|
<meta name="DC.Relation" scheme="URI" content="rzajyconnectinglandevices.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzajylancnntmrandlancnnrty.htm" />
|
|
<meta name="DC.Relation" scheme="URI" content="rzajyconfailureandcntrlrdesc.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="rzajylandeviceconinitiation" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>LAN device connection initiation</title>
|
|
</head>
|
|
<body id="rzajylandeviceconinitiation"><a name="rzajylandeviceconinitiation"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">LAN device connection initiation</h1>
|
|
<div><p>In an SNA environment you can determine which server initiates
|
|
the connection request and which server waits for an incoming connection request.</p>
|
|
<p> To have your server initiate the connection, you can configure the controller
|
|
description to dial the destination. If no connection is established, your
|
|
controller description automatically switches to answer mode.</p>
|
|
<p>To have your server wait for incoming calls, you can configure the controller
|
|
description to answer the incoming calls. You specify the mode through the
|
|
Initial connection (INLCNN) field of the controller description:</p>
|
|
<div class="section"><h4 class="sectiontitle">Dial mode (SNA)</h4><p>SNA controller descriptions use
|
|
dial mode to send a connection request to a remote device. Dial mode typically
|
|
starts when varying on the controller description. However, if the DIALINIT
|
|
parameter is set to *DELAY, dial mode will not begin until an application
|
|
opens a file that uses the connection. During the dialing process, the server
|
|
polls the remote device to determine if the device is available. If the remote
|
|
device is available, the connection process continues. Successful connection
|
|
is still possible even if the local and remote devices dial each other simultaneously.</p>
|
|
<p>The
|
|
controller description fields below set the frequency and duration of the
|
|
poll:</p>
|
|
<ul><li>LAN connection retry (LANCNNRTY) determines the number of times your server
|
|
polls the remote device. </li>
|
|
<li>LAN connection timer (LANCNNTMR) determines the length of time between
|
|
each poll. </li>
|
|
</ul>
|
|
<p>If the remote device answers the poll within the time specified by
|
|
the parameters, your server proceeds with establishing the connection. If
|
|
not, your server sends an inquiry message (CPA58E0 or CPA57EF) to the configured
|
|
message queue. This message indicates that a connection attempt failed and
|
|
that the controller description is now in answer mode.</p>
|
|
</div>
|
|
<div class="section"><h4 class="sectiontitle">Answer mode (SNA)</h4><p>If you specify answer mode, the
|
|
input/output adapter (IOA) does not originate connection requests, but will
|
|
respond to incoming connection requests. Servers with controller descriptions
|
|
that are configured with dial mode will initiate and accept connection requests.
|
|
However, APPC controllers that are user owned (CTLOWN = *USER) must be varied
|
|
on before the server can respond to connection requests.</p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajyconnectinglandevices.htm" title="The correct line and controller descriptions will help you achieve successful connections.">Connect LAN devices</a></div>
|
|
</div>
|
|
<div class="relref"><strong>Related reference</strong><br />
|
|
<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>
|
|
<div><a href="rzajyconfailureandcntrlrdesc.htm">Connection failure and controller descriptions</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |