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    <title>topic Re: Coexistence of different versions of ESXi in vSphere Upgrade &amp; Install Discussions</title>
    <link>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252245#M26119</link>
    <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;There is no big issue of have different versions during the migration process, just take in mind that for example if you create a VM on vSphere ESXi 5.5 using Hardware Version 10, this VM will be unable to boot on vSphere ESXi 5.0 hosts.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
    <pubDate>Mon, 22 Jun 2015 20:13:43 GMT</pubDate>
    <dc:creator>rcporto</dc:creator>
    <dc:date>2015-06-22T20:13:43Z</dc:date>
    <item>
      <title>Coexistence of different versions of ESXi</title>
      <link>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252243#M26117</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;I am planning the upgrade of a vSphere 5.0 infrastructure (vCenter 5.0 and ESXi hosts 5.0) to version 5.5 u2.&lt;/P&gt;&lt;P&gt;We will start from the vCenter&lt;/P&gt;&lt;P&gt;For some times (days or weeks) we will have different versions:&lt;/P&gt;&lt;UL&gt;&lt;LI&gt;vCenter 5.5 and ESXi nodes 5.0&lt;/LI&gt;&lt;LI&gt;vCenter 5.5 and some ESXi nodes 5.0 and other ESXi nodes 5.5&lt;/LI&gt;&lt;/UL&gt;&lt;P&gt;At the end of the process everything will be alligned to version 5.5 u2.&lt;/P&gt;&lt;P&gt;Is there any known issue or anything to consider for the period whith all the ESXi nodes or some ESXi hosts still running 5.0?&lt;/P&gt;&lt;P&gt;Is there anything we won't be able to do or we should do in order to let the whole of thwe infrastructure run without causing problems to users?&lt;/P&gt;&lt;P&gt;Regards&lt;/P&gt;&lt;P&gt;Marius&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 22 Jun 2015 07:50:55 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252243#M26117</guid>
      <dc:creator>MariusRoma</dc:creator>
      <dc:date>2015-06-22T07:50:55Z</dc:date>
    </item>
    <item>
      <title>Re: Coexistence of different versions of ESXi</title>
      <link>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252244#M26118</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;Probably the most important part would be to make sure all of the nodes in a cluster are at the same release.&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;&lt;/P&gt;&lt;P&gt;Curious - why did you choose 5.5 u2 over 6.0?&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 22 Jun 2015 19:57:40 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252244#M26118</guid>
      <dc:creator>TBKing</dc:creator>
      <dc:date>2015-06-22T19:57:40Z</dc:date>
    </item>
    <item>
      <title>Re: Coexistence of different versions of ESXi</title>
      <link>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252245#M26119</link>
      <description>&lt;HTML&gt;&lt;HEAD&gt;&lt;/HEAD&gt;&lt;BODY&gt;&lt;P&gt;There is no big issue of have different versions during the migration process, just take in mind that for example if you create a VM on vSphere ESXi 5.5 using Hardware Version 10, this VM will be unable to boot on vSphere ESXi 5.0 hosts.&lt;/P&gt;&lt;/BODY&gt;&lt;/HTML&gt;</description>
      <pubDate>Mon, 22 Jun 2015 20:13:43 GMT</pubDate>
      <guid>https://communities.vmware.com/t5/vSphere-Upgrade-Install/Coexistence-of-different-versions-of-ESXi/m-p/2252245#M26119</guid>
      <dc:creator>rcporto</dc:creator>
      <dc:date>2015-06-22T20:13:43Z</dc:date>
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