[VCF 9.x] Deploying new VCF/VVF instance fails at the final deploy and validate stage with error "The vCenter Server virtual machine is not connected to a distributed virtual port group or the dvpg has an association with non management traffic type"

Products

• VMware vCenter Server

Issue/Introduction

• Deployment of a new VCF/VVF instance fails at the final validation stage with error "The vCenter Server virtual machine is not connected to a distributed virtual port group or the dvpg has an association with non-management traffic type". Below screenshot confirms how it looks like in the installer UI.
  
  
  
  
• An existing vCenter Server is being admitted to the VCF/VVF setup and the same is connected over a standard switch.

Environment

VMware Cloud Foundation 9.x
VMware vCenter Server 9.0.x

Resolution

Migrate the vCenter Server VM from Standard to Distributed Switch. The detailed instructions on how to perform the same can be found here- Migrating from Standard to Distributed vSwitch

Point to consider before migrating the vCenter Server VM to a Distributed Switch.

Migrating the Virtual Machine from Standard to distributed switch involves migrating the physical adapters as well. In case the physical adapter which serves as an uplink to the Virtual Machine network serves as an uplink to the management network of the ESXi Host too, migrating it without having a redundant NIC can cause the Host to go completely unresponsive and the host network will have to be restored from the DCUI.  

In the best-case scenario, these changes are invalidated and rolled back automatically however till the time the changes aren't rolled back, the vCenter server can go down or become unresponsive. Ensure you have a redundant NIC for the host's management network before you proceed with the migration.