Consolidating Legacy vSphere and Older VCF onto VMware Cloud Foundation 9.1: Design Patterns, Migration Paths, and Best Practices

This article addresses the complex process of consolidating older vSphere and VMware Cloud Foundation (VCF) environments onto VCF 9.1. It emphasizes that this is not a single upgrade but a portfolio decision involving four actions: upgrading existing VCF instances, converging vSphere infrastructure, importing vCenters as workload domains, or migrating workloads to a clean target. The article stresses intentional design based on lifecycle, security, hardware, and operational requirements, and advises thorough inventory before selecting a path. It highlights unsupported or customized environments as migration sources rather than direct conversions, and frames consolidation as a control-plane redesign to reduce management duplication.