Workload Domain deployment fails in VCF Operations due to an invalid Supervisor management network IP range

Products

• VMware Cloud Foundation

Issue/Introduction

• Attempts to deploy a new Workload Domain (WLD) in VCF Operations are failing during the configuration or validation phase. The system halts the deployment with the following error:

"Error creating a new workload domain: The Supervisor management network IP range is invalid."

• Ping tests confirmed that an IP address within the requested block is currently in use.
  
  
• An additional check also verified that this conflicting IP overlaps the subnet assigned for NSX control plane deployment.

Environment

VMware Cloud Foundation Operations 9.x

Cause

The failure is caused by an IP address conflict in the deployment payload. The network range allocated for the vSphere with Tanzu Supervisor control plane nodes overlaps with existing management infrastructure, active IP addresses.

The Supervisor cluster deployment strictly requires a block of 5 consecutive, unallocated IP addresses on the management network.

Resolution

1. Scan the management network subnet to identify a clean, unused block of IP addresses.
   
   
2. Dedicate a new, contiguous range of exactly 5 consecutive IP addresses exclusively for the Supervisor control plane nodes.
   
   
3. Input the newly allocated, conflict-free IP range into the Workload Domain deployment wizard.
   
   
4. Re-initiate the deployment and validation workflow.

Additional Information

To release unused vMotion or vSAN IP addresses from the SDDC Manager network pool, please refer to the following "Failed to validate host spec - Insufficient free IPs" or "Failed to allocate IPs from networks with error".