Upgrade / update ESXi from 5.1 to 5.5

Now that your have your vcenter appliance and update manager updated your all ready to update hosts.  Here is the process:

  • Download the ESXi 5.5 ISO
  • Log into vcenter fat client
  • Home -> Update Manager
  • ESXi Images -> Import ESXi Image
  • As part of import you can create a baseline called something like ESXi 5.5 Upgrade.
  • Hosts and Clusters -> Select cluster and Update Manager

    Attach the new upgrade baseline and scan hosts

  • Then remediation to apply 5.5
  • Login to console of ESXi to reboot it after upgrade (on mine it required a reboot first before it would upgrade so you may have to reboot twice)
  • Reconnect in vcenter
  • Scan for update
  • License Server again
  • Exit Maint mode and you have a 5.5 ESXi host

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