The private VIF allows vMotion, ESXi management, management appliance, and workload traffic to flow over the Direct Connect connection between on-premises environment and SDDC.
Steps to create private VIF
Note: The DX must be in the same region as the SDDC for the VIF to be attached.
Workaround:
Once the account ID is verified and the DX is in the same region as the SDDC, for further assistance file a Support Request. For more information, see How to file a Support Request in Customer Connect.
For more information refer: Create a Private Virtual Interface for vMotion, ESXi Management, Management Appliance, and Workload Traffic.