Tag: VMware Update Manager


How to upgrade ESXi 5.5 to 6.5.0 using Update Manager


The following upgrade process will explain you the step by step procedure to upgrade ESXi hosts from 5.5 to 6.5 using update manager:

Pre-upgrade check:

  • Download the ESXi 6.5 ISO image from myvmware.com/softwares/downloads
  • Before upgrading ESXi hosts, complete the vCenter upgrade and check the compatibility of the hardware from “VMware Compatibility Guide
  • Based on the compatibility matrix, consider to upgrade hardware BIOS firmware, drivers, HBA, NICs and partner vendor’s software vibs or include them in the baseline from update manager.
  • Check whether enough resources are available in the ESXi hosts part of the cluster to migrate virtual machines.

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VMware update manager plugin in vCenter disabled with connection error.


VMware update manager plugin in vCenter will be disabled with connection error.

Failure cases can be:

  • From the Installed Plug-ins, if you try to enable the disabled VMware vSphere Update Manager plugin. It will get disabled with error.
  • You see the error: There was an error connecting to VMware vSphere Update manager – [vCenter Name or IP:443]. The request failed because of a connection failure. (Unable to connect to the remote server).
  • You see the error: There was an error connecting to VMware vSphere Update manager – [vCenter Name or IP:443]. : Vmomi.Fault.NotAuthenticated : the Session is not authenticated.
  • You see the error: An internal error occurred in the vSphere Client. Details: Unable to connect to the remote server

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