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VCF 9.1 - Demystifying Supported Upgrade Paths to 9.1

05.23.2026 by William Lam // 2 Comments

The rapid advancement of frontier AI capabilities, including recent developments from Anthropic Mythos, keeping software and infrastructure up to date has become a critical priority for many IT organizations.

VMware vSphere Foundation (VVF) and VMware Cloud Foundation 9.1 introduce a ton of powerful new private cloud capabilities, which has generated tremendous interest from both customers and partners, ranging from new deployments to modernizing existing environments, all with the goal of building a more secure and resilient private cloud platform while also helping address the rapidly evolving threat landscape.

One area that has significantly changed from earlier VCF releases prior to VCF 9.0 is around upgrades, which has been a major source of confusion, even for myself at times. I will not try to defend some of the confusion and misconceptions from the past, but I will say that VCF 9.1 introduces more flexible upgrade paths, allowing customers to take advantage of the latest capabilities while also meeting them where they are currently at in their Private Cloud journey.

With that said, I am hoping this quick blog post, along with some visuals, will help demystify the supported upgrade paths to VCF 9.1, including some of the common misconceptions around specific feature capabilities and future direction, especially as it relates to VCF Automation VM Apps (Traditional) and VM Apps (Modern) or Networking using VLAN-backed, NSX Overlay/Segment and Modern NSX VPC.

[Read more...]

Categories // VMware Cloud Foundation, VMware vSphere Foundation Tags // VCF 9.1

VCF 9.1 - Quick Tip: Using the VCF Installer as a Standalone Pre-Check Tool

05.22.2026 by William Lam // Leave a Comment

The VCF Installer appliance is used to deploy either a VMware vSphere Foundation (VVF) or a VMware Cloud Foundation (VCF) deployment. Customers can re-use their existing components (vCenter Server, NSX Manager, VCF Operations or VCF Automation) that have already been deployed or they can start from scratch, deploying all brand new components.

To accommodate the wide range of deployment permutations, the VCF Installer includes a comprehensive set of validations and pre-checks that are performed prior to deploying a new VCF Fleet.

I recently recieved an interesting question on whether the VCF Installer could be deployed just for the purpose of environment validation without deploying anything?

[Read more...]

Categories // VMware Cloud Foundation Tags // VCF 9.1

VCF 9.1 - Additional IP allocation options for VCF Management Services (VCFMS) in VCF Installer and SDDC Manager

05.21.2026 by William Lam // 4 Comments

One of the new components introduced in VMware vSphere Foundation (VVF) and VMware Cloud Foundation (VCF) 9.1 is the VCF Management Services (VCFMS), which provides a centralized system for unifying both existing and new capabilities for VCF Fleet management and operations.

When deploying a brand new VCF Fleet using the VCF Installer, the required input for the IP address allocation uses an IP range format (minimum of 12 consecutive addresses and up to 30 for additional component deployment and scale out).


When upgrading from an existing environment using the SDDC Manager, the required input for the IP address allocation uses an network CIDR format.


While the minimum IP allocation is the same for both a new installation or an upgrade, the actual IPs required will differ due to different input formats [Read more...]

Categories // VMware Cloud Foundation Tags // VCF 9.1

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William is Distinguished Platform Engineering Architect in the VMware Cloud Foundation (VCF) Division at Broadcom. His primary focus is helping customers and partners build, run and operate a modern Private Cloud using the VMware Cloud Foundation (VCF) platform.

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