Upgrading VMware NSX®Data Center for vSphere® to version 6.4.4 involves upgrading NSX Manager Appliance, NSX Controller cluster, NSX host clusters, and NSX Edge, in the order specified.
Prerequisites
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Ensure to refer to these topics in the NSX Upgrade guide:
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Take a backup of the NSX components before starting any upgrade. For more information, see the NSX Backup and Restore section.
Note:
The upgrade process is managed by NSX Manager. If the upgrade of a component fails or is interrupted and you have to repeat or restart the upgrade, the process begins from the point at which it stopped. The upgrade process does not start over from the beginning.