To help ensure a successful NSX Data Center for vSphere upgrade, check the release notes for upgrade issues, prepare the infrastructure for the upgrade, and use the correct upgrade sequence.
NSX Data Center for vSphere functionality is affected during upgrade:
See Operational Impacts of NSX Upgrades for information about the effect of each part of the upgrade.
As a best practice, quiesce all operations in the environment until all sections of the upgrade are finished.
Downgrades are not supported:
Always back up NSX Manager before proceeding with an upgrade.
After NSX Manager has been upgraded successfully, NSX cannot be downgraded.