License a Standalone ESX 9.1 Host Using the New License Server Appliance (No VCF Operations Required)

In the previous post, I covered how to license a standalone ESX 9.0 host by importing a private license file directly on the host with esxcli. That workflow was straightforward: generate a keypair, grab a license file from the portal, scp both files to the host, run two esxcli commands, done. VCF 9.1 changes everything. Starting with 9.1, you cannot generate individual ESX host licenses from the VCF Business Services console and apply them directly. Instead, Broadcom introduced a License Server appliance — a small OVA that sits between the portal and your hosts. You import your private license file into the License Server, and the License Server issues host-scoped licenses to each ESX host via API. ...

May 15, 2026 · Cosmin Trif

License a Standalone ESX 9.0 Host with a Private License File (When the Trial Expired and vCenter Won’t Boot)

If you upgraded (or deployed) ESX/ESXi 9.0 in a lab and let the evaluation expire, you can end up in the classic chicken-and-egg situation: your vCenter is a VM, but you can’t power it on because the host is no longer licensed. With VCF / vSphere Foundation 9.0, licensing moved away from the old 25-character keys and into license files(normally handled through VCF Operations), which is great… until you don’t have VCF Ops up yet. (VMware Blogs) ...

February 23, 2026 · Cosmin Trif

Downgrading the ESXi version to a different build

During one of the recent upgrades in my VCF environment i accidentally upgraded the ESXi 7.x build number to a later build that was not in the validated design which caused all kinds of issues and errors in my sddc manager. In order to address this i wanted to see i could actually downgrade the packages to a lower build number. It goes without saying that this procedure should not be done in a production environment and you should contact VMware customer support for an supported downgrade method. We will be working in the ESXi cli on this guide ...

October 25, 2021 · Cosmin Trif
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Shutting down a vSAN Cluster

I have the need to completely shut down some of my vSAN clusters for various clusters and ive been having a hard time finding the proper procedure. As of 2/16/2021 VMware released guidance here Here are the steps i took to do it on my end. If you have the vCLS service enabled follow my other instructions here prior to starting the rest of this guide. Disable cluster member updates from vCenter on each ESXi host in the cluster by running ...

March 27, 2021 · Cosmin Trif