6.5.1

Table Of Contents
Upgrading ESXi Hosts 8
After you upgrade vCenter Server and vSphere Update Manager, upgrade VMware ESXi hosts. You can
upgrade ESXi 5.5.x and ESXi 6.0.x hosts directly to ESXi 6.5.
To upgrade hosts, you can use the tools and methods that are described in Overview of the ESXi Host
Upgrade Process.
Caution If you upgrade hosts managed by vCenter Server, you must upgrade to vCenter Server before
you upgrade ESXi. If you do not upgrade in the correct order, you can lose data and lose access to
servers.
This section includes the following topics:
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ESXi Requirements
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Before Upgrading ESXi Hosts
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Upgrade Hosts Interactively
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Installing or Upgrading Hosts by Using a Script
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PXE Booting the ESXi Installer
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Upgrading Hosts by Using esxcli Commands
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After You Upgrade ESXi Hosts
ESXi Requirements
To install or upgrade ESXi, your system must meet specific hardware and software requirements.
ESXi Hardware Requirements
Make sure the host meets the minimum hardware configurations supported by ESXi6.5.
Hardware and System Resources
To install or upgrade ESXi, your hardware and system resources must meet the following requirements:
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Supported server platform. For a list of supported platforms, see the VMware Compatibility Guide at
http://www.vmware.com/resources/compatibility.
VMware, Inc.
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