135 lines
9.9 KiB
HTML
135 lines
9.9 KiB
HTML
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<title>Virtual Ethernet problems with iSCSI attached servers</title>
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<a name="rzahqvirtethproblemsoniscsi"></a>
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<h4 id="rzahqvirtethproblemsoniscsi">Virtual Ethernet problems with iSCSI attached servers</h4>
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<p>To see information about the connections available to the Windows TCP/IP
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stack, enter<span class="bold"> ipconfig /all</span> at a Windows command prompt.
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You should see information about the following things:</p>
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<ul>
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<li>External network adapters</li>
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<li>The LAN interfaces for the iSCSI HBA ports</li>
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<li>Virtual Ethernet adapters for your iSeries™ server</li></ul>
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<p>Match the results of the ipconfig command with one of the following troubleshooting
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cases and perform the actions suggested for that case until the problem is
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resolved.</p>
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<p><span class="bold">A configured LAN IP address is missing in ipconfig</span></p>
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<p>This case applies if an internet address for a LAN interface in the i5/OS
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remote configuration does not match an IP address that ipconfig shows for
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any iSCSI HBA. To display the remote system configuration, see <a href="rzahqdisiplayremotesysconfig.htm#rzahqdisiplayremotesysconfig">Display remote system configuration properties</a>.</p>
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<ul>
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<li>Examine the ipconfig results to find the physical addresses (MAC addresses)
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of the iSCSI HBAs. If a physical address displayed by ipconfig is different
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than the adapter address for the LAN interface in the i5/OS remote system
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configuration, do the following steps.
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<ol type="1">
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<li>Shut down the server from the Windows console.</li>
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<li>Vary off the NWSD from i5/OS. See <a href="rzahqstartnstop.htm#rzahqstartnstop">Start and stop an integrated server</a>.</li>
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<li>Change the adapter address for the LAN interface in the remote system
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configuration.</li>
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<li>Using i5/OS, start (vary on) the NWSD. See <a href="rzahqstartnstop.htm#rzahqstartnstop">Start and stop an integrated server</a>.</li></ol></li>
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<li>Open <span class="bold">Control Panel</span>, then <span class="bold">Administrative
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Tools</span>, then <span class="bold">Services</span>. Ensure that <span class="bold">iSeries Shutdown Manager</span> is in the list of services and has a status
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of <span class="bold">Started</span>. This service automatically assigns LAN
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IP interface information from the i5/OS remote system configuration to ports
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having the configured MAC addresses.</li>
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<li>Look in the <span class="bold">Application event log</span> in Windows for
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events with a source of <span class="bold">iSeries Shutdown Manager</span>.</li>
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<li>Close any network properties window having <span class="bold">General</span>, <span class="bold">Authentication</span>, and <span class="bold">Advanced</span> tabs
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because this type of window locks resources required for assigning an IP address.
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If you close this type of window, wait 30 seconds for iSeries Shutdown Manager
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to assign the missing IP address, and enter <span class="bold">ipconfig /all</span> again.</li>
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<li>If none of the ipconfig results describe an installed iSCSI HBA, open
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Device Manager in Windows and ensure that the network driver for the iSCSI
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HBA is installed and enabled. If the driver has a yellow '!' or
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is grayed out, look in the System event log in Windows for events with a source
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of QL40xx and ensure that the iSCSI HBA is not disabled by the system BIOS
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setup menu.</li></ul>
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<p><span class="bold">Ipconfig shows a configured iSCSI HBA connection in media
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disconnected state</span></p>
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<p>This case applies if ipconfig shows an iSCSI HBA connection that is in
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media disconnected state and has a physical address that matches an adapter
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address in the i5/OS remote system configuration.</p>
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<ul>
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<li>Ensure that the physical network is properly connected, and that devices
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in the network, such as switches, are functioning at the physical link to
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the hosted system's iSCSI HBA.</li></ul>
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<p><span class="bold">Ipconfig shows an IBM iSeries Virtual Ethernet connection
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in media disconnected state </span></p>
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<ul>
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<li>Virtual Ethernet requires a working iSCSI network, so iSCSI HBA problems
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must be resolved first. Ensure that ipconfig shows the LAN addresses in the
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i5/OS remote system configuration before proceeding.</li>
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<li>Ensure that the physical network is properly connected, and that devices
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in the network, such as switches, are functioning beyond the physical link
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to the hosted system's iSCSI HBA.</li>
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<li>Ensure that requirements defined in <a href="rzahqnciscinetwork.htm#rzahqnciscinetwork">iSCSI network</a> are
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satisfied.</li>
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<li>Open <span class="bold">Control Panel</span>, then <span class="bold">Administrative
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Tools</span>, then <span class="bold">Services</span>. Ensure that <span class="bold">iSeries Manager</span>,<span class="bold"> iSeries Shutdown Manager</span>, and <span class="bold">iSeries Virtual Ethernet Manager</span> are in the list of services
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and have a status of <span class="bold">Started</span>.</li>
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<li>Look in the <span class="bold">Application</span> event log in Windows for
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events with a source of <span class="bold">iSeries Virtual Ethernet Manager</span>.</li>
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<li>If a firewall or a similar packet filtering function is involved, see <a href="rzahqconffirewall.htm#rzahqconffirewall">Configure a firewall</a>. LAN IP interfaces in the i5/OS remote system
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configuration can be affected by firewall software running in Windows.</li>
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<li>If your NWSD uses IPSec rules other than *NONE, see the <a href="http://www.ibm.com/servers/eserver/iseries/integratedxseries/iscsireadme/troubleshooting.html" target="_blank">iSCSI troubleshooting </a> web page
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<img src="www.gif" alt="Link outside the Information Center." />
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<br />(www.ibm.com/servers/eserver/iseries/integratedxseries/iscsireadme/troubleshooting.html).</li></ul>
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<p><span class="bold">Ipconfig shows an IBM iSeries Virtual Ethernet connection
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with an incorrect IP address</span></p>
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<ul>
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<li>Manually configure the IP address in Windows. For point to point virtual
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Ethernet, see <a href="rzahqipcpi.htm#rzahqipcpi">Point to point virtual Ethernet IP address conflicts</a>. For other virtual Ethernet networks,
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only steps 1 - 5 of this procedure apply.</li></ul>
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<p><span class="bold">'Virtual Ethernet x' is configured in i5/OS and 'IBM
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iSeries Virtual Ethernet x' is missing in ipconfig</span></p>
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<ul>
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<li>In i5/OS, verify that the line description exists for the virtual Ethernet
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of interest. For point to point virtual Ethernet, see <a href="rzahqpointtopointveth.htm#rzahqpointtopointveth">Explore point to point virtual Ethernet networks</a>.</li>
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<li>Open <span class="bold">Control Panel</span>, then <span class="bold">Administrative
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Tools</span>, then <span class="bold">Services</span>. Ensure that <span class="bold">iSeries Virtual Ethernet Manager</span> is in the list of services and has a
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status of <span class="bold">Started</span>. This service automatically creates
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and removes IBM iSeries Virtual Ethernet adapters to match the line description
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configuration in i5/OS.</li>
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<li>Ensure that the system is not set to block installation of unsigned drivers.
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For details, see steps 1-4 of <a href="rzahqtroubleshootlandrvs01.htm#rzahqtroubleshootlandrvs01">Begin the LAN driver installation or update</a>.
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If you change the setting from <span class="bold">Block</span>, restart the <span class="bold"> iSeries Virtual Ethernet Manager</span> service, wait 30 seconds
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and enter <span class="bold">ipconfig /all</span> again.</li>
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<li>Open <span class="bold">Device Manager</span> in Windows and ensure that the
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network driver for the IBM iSeries Virtual Ethernet adapter of interest is
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installed and enabled. If a yellow '!' is shown near the driver,
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look in the <span class="bold">System</span> event log in Windows for events with
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a source of <span class="bold">Qvndvimp</span>.</li></ul>
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<p><span class="bold">Ipconfig results look OK but large transfers fail</span></p>
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<ul>
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<li>Ensure that the IBM iSeries Virtual Ethernet adapters and the 'LAN'
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side of iSCSI HBA ports are not configured to use a larger maximum transmission
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unit than the iSCSI network supports. For example, not all switches support
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9000 byte jumbo frames. Check the specifications of your network equipment.
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For more information, see <a href="rzahqiscsimtucons.htm#rzahqiscsimtucons">Maximum transmission unit (MTU) considerations</a>.</li></ul><img src="deltaend.gif" alt="End of change" /><img src="deltaend.gif" alt="End of change" />
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