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<title>Virtual Ethernet problems with IXS and IXA attached servers</title>
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<h3 id="rzahqtroubleshootveconn">Virtual Ethernet problems with IXS and IXA attached servers</h3>
<p>For the purposes of this section, the virtual Ethernet point to point LAN
and the virtual Ethernet ports 0-9 are all considered virtual Ethernet adapters
or virtual Ethernet ports.</p>
<p>There are two kinds of virtual Ethernet device drivers, virtual Ethernet
Adapter (VE) and a virtual Ethernet Data Transport (DT).</p>
<ul>
<li>The virtual Ethernet Adapter corresponds to the driver that appears as
the adapter, called 'virtual' because no NIC hardware is associated with
it.</li>
<li>The virtual Ethernet Data Transport is the driver that provides a connection
to the system bus connecting all the virtual Ethernet networks.</li></ul>
<p>When a VE port cannot communicate across the system bus, it reports that
the cable for the port is unplugged (cable disconnected). This is an important
concept for troubleshooting virtual Ethernet errors.</p>
<p>The virtual Ethernet Ports under Windows are automatically installed and
uninstalled by the virtual Ethernet Utility (VEU). The utility receives signaling
through a configuration file from the NWSD. For example, when a user creates
a Line Description under the NWSD for a given virtual Ethernet Port the VEU
installs the corresponding VE port. Rebooting the Windows server configures
the VE port address.</p>
<p>The following virtual Ethernet components use the listed driver.</p>
<ul>
<li>virtual Ethernet Adapter: qvndvemp.sys</li>
<li>virtual Ethernet Data Transport: qvndvedt.sys</li>
<li>virtual Ethernet Install Utility: qvndveu.exe</li></ul>
<p>Troubleshooting virtual Ethernet problems</p>
<p>When the communication between any VE ports is not functioning, you need
to perform two general tasks to troubleshoot the problem.</p>
<ol type="1">
<li>Determine the status of the VE ports.</li>
<li>Match the observed results to the following troubleshooting cases.</li></ol>
<p><span class="bold">Determine VE port status</span></p>
<p>To determine the status of the VE ports.</p>
<ul>
<li>Use the iSeries console to determine if a line description for the VE
port is created under the NWSD.</li>
<li>Use the Windows console to open the <span class="bold">Network and Dial
Up Connections</span> folder and determine if the VE port icon is present.</li></ul>
<p><span class="bold">Match port status with troubleshooting cases</span></p>
<p>Match results of your determination of the status of the VE ports to one
of the following troubleshooting cases.</p>
<ul>
<li><a href="iconyeslineyes.htm#iconyeslineyes">Both line description and icon are present</a>.</li>
<li><a href="iconnolineyes.htm#iconnolineyes">Line description is present and icon is missing</a>.</li>
<li><a href="iconyeslineno.htm#iconyeslineno">Line description is missing and icon is present</a>.</li>
<li><a href="iconnolineno.htm#iconnolineno">Both line description and icon are missing</a>.</li></ul>
<p>In each case, you must first verify the i5/OS side then verify the Windows
side. To verify the Windows side, you may need to open the Event Log and
the Device Manager.</p>
<ul>
<li>To open the Event Log, from the Windows <span class="bold">Start</span> menu,
select <span class="bold">Programs</span>, then <span class="bold">Administrative
Tools</span>, then <span class="bold">Event Viewer</span>.</li>
<li>To open the Device Manager, from the Windows <span class="bold">Start</span> menu,
select <span class="bold">Settings</span>, then <span class="bold">Control Panel</span>, then <span class="bold">Administrative Tools</span>, then <span class="bold">Computer Management</span>, then <span class="bold">Device Manager</span>.</li></ul>
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