Take a look at how i did migration of Windows based vCenter 6.0 to vCenter Server appliance 6.5 I have migrated my existing windows vCenter Server to vCSA 6.5. vCenter Server should be upgrade to vCenter 6.5.

Pre-requisite to upgrade ESXi 6.0 to ESXi 6.5 using VMware Update Manager In this article, I will explain the detailed procedure to upgrade ESXi 6.0 to ESxi 6.5 using VMware Update Manager. We can also combine drivers and other softwares such as mutipathing softwares such as Powerpath in the baseline, once the hosts are upgraded. All this needs to be planned prior to upgrading ESXi host. We also need to consider upgrading the firmware of your ESXi hardware before upgrading ESXi hosts. We also need to validate the compatible driver and firmware versions of network adapter,HBA adapters,etc. Before upgrading ESXi hosts, We need to consider vCenter Server Upgrade and also need to validating that whether the existing hardware is compatible with ESXi 6.5. Well Planning is required before we start the upgrade of ESXi hosts. In this article, I am going to explain the detailed procedure to upgrade ESXi 6.0 to ESXi 6.5 using VMware Update Manager. If you consider the enterprise infrastructure with more than hundred of ESXi hosts may require to upgrade it via VMware Update Manager to simplify the upgrade procedure. Upgrade ESXi host via ISO or Command line may suitable for the infrastructure with less number of ESXi host. Method of upgrading ESXi 6.0 to ESXi 6.5 may depend on the number of the ESXi hosts in the infrastructure. There are multiple ways to upgrade ESXi 6.0 to ESXi 6.5 such as direct ISO image, upgrade via CLI (command Line) and upgrade via VMware Update Manager. To make use of new vSphere features available with vSphere 6.5, We need to upgrade the vCenter server 6.0 to vCenter server 6.5 and also Upgrade ESXi 6.0 to ESXi 6.5 along with the Virtual machine hardware upgrade & VMware Tools on the guest operating system. VSphere 6.5 released with excellent new features to improve the security and high availability of critical applications running on the virtual machines. Diff VCenter 5.5 appliance and vCenter on WIndows.

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