NSX-T upgrade is unavailable in offline VMware Cloud Foundation (VCF) on VxRail environments.

Products

• VMware SDDC Manager

Issue/Introduction

• During the upgrade of an offline VCF on VxRail 5.x environment the NSX-T upgrade cannot be started or scheduled.
• The NSX-T upgrade is listed in the upgrade plan but the option to 'Update Now' or schedule the upgrades are not visible in SDDC manager UI. 

Environment

Offline VCF environments/dark sites. 
VCF on VxRail 5.x

Cause

NSX-T bundle will not be available for use until the upgrade plan has a VxRail build number.  

Resolution

Upload the appropriate VxRail bundle to SDDC manager with the Bundle Transfer Utility and refresh the SDDC manager UI. 

Additional Information

These knowledge base article will assist with resolution and further troubleshooting:

Troubleshooting: Resolve VxRail Upgrade Failure when upgrading from VCF on VxRail 5.X to 5.Y 
https://knowledge.broadcom.com/external/article?articleNumber=323978

SDDC upgrade wizard fails to list NSX-T
https://knowledge.broadcom.com/external/article/377484/sddc-upgrade-wizard-fails-to-list-nsxt.html