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VCF 9.1 - Demystifying Supported Upgrade Paths to 9.1

05.23.2026 by William Lam // 7 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 All 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 - Automated VMware Cloud Foundation (VCF) & VMware vSphere Foundation (VVF) Nested Lab Deployment

05.14.2026 by William Lam // 13 Comments

Nested ESX continues to be a popular way to explore and learn about VMware Cloud Foundation (VCF), it is also the basis for the VCF Holodeck solution.

With the release of VCF 9.1, Nested ESXi VMs can now run on physical hosts with NVMe Tiering enabled, no workarounds required. In addition, you can extend the benefits of NVMe Tiering to a Nested ESX VM by applying the following VM Advanced Setting.

The easiest and quickest way to deploy a Nested ESX VM is to my Nested ESX Virtual Appliance, which has been refreshed for 9.1!

Note: The latest Nested ESX 9.1 Virtual Appliance no longer comes with default password, you will need to specify that as part of the OVF deployment.

While I have personally switched from using a nested VCF deployments to physical setup, mainly due to lack of resources, I know many of you do have sufficient capacity to run a full VCF deployment in a Nested environment.

I have also refreshed my VMware Cloud Foundation Nested Lab (VCF) Fleet Deployment script to support both VCF and VVF 9.1


Here is a screenshot of the initial deployment that takes ~25 minutes to deploy three Nested ESX VM, initialize the VCF Installer, sync from a VCF Offline Depot, generate the deployment JSON and then automatically start the VCF Fleet deployment. 😎

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

VCF 9.1 - Comprehensive ESX Configuration Workarounds for Lab Deployments

05.11.2026 by William Lam // 15 Comments

With the announcement of VMware vSphere Foundation (VVF) and VMware Cloud Foundation (VCF) 9.1, I know many of you are eager to start planning for 9.1 and get it into your lab environment for hands-on experience as the first step toward pre-production validation.

Unless you are among the few with adequate resources, including servers listed on the Broadcom Compatibility Guide (BCG), most lab environments are resource constrained in one way or another.

To help expedite your 9.1 deployment for non-production usage, I have documented the various ESX configuration workarounds that can used for lab deployments, especially for functional testing and/or for educational purpose.

I will continue to update this page with new information, so be sure to bookmark for your single reference!

[Read more...]

Categories // ESXi, VMware Cloud Foundation, VMware vSphere 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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Recent

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