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<h1 class="topictitle1">Scenario: SNA direct connection to a host system</h1>
<div><p><a href="#rzak3directhostcenario__rzak3sna3745fig">Figure 1</a> shows the
configuration of an iSeries™ system for frame-relay communications with
a 3745 Host Controller.</p>
<div class="fignone" id="rzak3directhostcenario__rzak3sna3745fig"><a name="rzak3directhostcenario__rzak3sna3745fig"><!-- --></a><span class="figcap">Figure 1. SNA direct connection to 3745 host controller</span><br /><img src="rzak3509.gif" alt="SNA direct connection to&#xA;3745 host controller" /><br /></div>
<p>The 3745 provides frame-relay network function, and the iSeries is
configured as a terminal equipment (TE).</p>
<p>A 64000-bps V.35 line exists between the iSeries and
the 3745. The iSeries system
might also have data link connection identifier (DLCI) connections to multiple
3745s, 6611s, and RouteXpanders through the 3745. However, these configurations
are not shown as part of this scenario.</p>
<p>There is a single permanent virtual circuit (PVC) connection
between the iSeries and
the host system. This connection supports a 3270 emulation device used to
access applications on the host. It also includes a distributed host command
facility (DHCF) session.</p>
<p><strong>Configuration for the iSeries system</strong></p>
<p>Use the following commands to configure the iSeries system
using an SNA direct connection with the 3745 and the host system:</p>
<pre>CRTNWIFR NWID(FR3745) RSRCNAME(LIN121) +
INTERFACE(*V35)<sup>1</sup> LINESPEED(64000)<sup>1</sup> +
LMIMODE(*TE)<sup>2</sup> TEXT('Frame relay connection to 3745')
CRTLINFR LIND(FR3745) NWI(FR3745) NWIDLCI(26) +
EXCHID(05636759) TEXT('DLCI connection to the host')
CRCTCLHOST CTLD(FRHOST) LINKTYPE(*FR) APPN(*NO) +
SWTLINLST(FR3745) MAXFRAME(8182) +
SSCPID(050000000001) SWTDSC(*YES) +
TEXT('Remote host system')
CRTDEVDSP DEVD(FRDHCF) DEVCLS(*RMT) TYPE(3277) +
MODEL(*DHCF) LOCADR(02) CTL(FRHOST) +
TEXT('Remote host system dhcf device')
CRTDEVHOST DEVD(FREML) LOCADR(01) RMTLOCNAME(HOSTSYS) +
CTL(FRHOST) APPTYPE(*EML) +
TEXT('Emulation device to remote host')</pre>
<div class="note"><span class="notetitle">Notes:</span> <ol><li>The INTERFACE and LINESPEEED parameters must match the characteristics
of the line to the 3745.</li>
<li>The LMI mode is the default value of *TE, which means the iSeries acts
as the terminal equipment. You must configure the 3745 as the frame handler
(FH) by using ANSI Annex D (DLCI 0).</li>
<li>By creating a frame-relay line description (CRTLINFR), you indicate that
the DLCI is connected to another device. The device supports the frame-relay
SNA direct frame format of RFC 1490, such as the 3745.</li>
<li>The DLCI for the line must match the DLCI that you assigned in the configuration
of the 3745.</li>
</ol>
</div>
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<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzak3rzak3snadirscenario.htm" title="This topic provides example scenarios of Systems Network Architecture (SNA) direct configuration.">Scenarios: SNA direct configuration for frame relay</a></div>
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