vCenter upgrade precheck from version 8.x to 9.x failing due to NSX version

Products

• VMware NSX
• VMware vCenter Server

Issue/Introduction

On the new 9.x appliance, the precheck will show the error, "Unsupported NSX version registered with vCenter."

The /var/log/vmware/upgrade/prechecks.json will show

           "translatable": "NSX '%(0)s' version '%(1)s' is not supported with the new vCenter version.",
           "args": [
               "com.vmware.nsx.management.nsxt",
               "4.2.2.1"
           ],
           "localized": "NSX 'com.vmware.nsx.management.nsxt' version '4.2.2.1' is not supported with the new vCenter version."

Environment

NSX version 4.2.2.1

vCenter 9.x

Cause

This interoperability is exclusively supported for upgrade scenarios managed via SDDC Manager (SDDC-M).

This specific version combination is not supported for new (greenfield) deployments.

Resolution

NSX 4.x deployments that are not part of VCF instances can be upgraded to version 9.0.x after they are first imported to existing VCF instances as workload domains.

Additional Information

VMware Cloud Foundation 9.0, Overview of Deploy, Converge, and Upgrade 

VMware Cloud Foundation 9.0, Import an Existing vCenter to Create a Workload Domain