Error: 'Failed to unregister vCenter Server "VC_NAME". Real networks from this vCenter Server are still referenced' while unregistering vCenter which is to be removed from VMware Cloud Director.

Products

• VMware Cloud Director

Issue/Introduction

• vCenter server is to be removed entirely from vCloud Director, however this error is shown in VCD when unregistering the vCenter:
  • [ ######-##-##-##-###### ] Failed to unregister vCenter Server "######". Real networks from this vCenter Server are still referenced. - Failed to unregister vCenter Server "######". Real networks from this vCenter Server are still referenced.
• This solution covers the scenario where you simply want to unregister this vCenter server and remove all its resources from VCD
  • For the scenario of migrating all resources to a replacement vCenter, please see KB# 397667

Environment

• VMware Cloud Director 10.5.x / 10.6.x

Cause

This issue can occur when there are references to this vCenter remaining in the real_network and real_network_backing tables in the Cloud Director database.

Resolution

If there are particular networks mentioned in the error message, please:

• Remove network resources which are linked to this vCenter through the vCenter GUI:
  • vApps
  • Network pools
  • References to the vCenter in External Networks
• Remove any leftover network resources which relate to networks in VCD in vCenter:
  • Logical networks
  • Port groups

With this complete, try unregistering the vCenter from VCD once again.

If this is not sufficient or you are facing further errors, please contact Broadcom Support and note this Article ID (404252) in the problem description.
For more information, see Creating and managing Broadcom support cases.