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Patching\Upgrading ESXi 8 to ESXi 9 via esxcli

With the latest release of ESXi 9 i wanted to get my lab up to date. I don’t have enough resources in my lab to migrate the vCenter to another ESXi server so i want to perform the upgrade via cli. More details about the release can found here The first step was to open the firewall for outgoing traffic for http esxcli network firewall ruleset set -e true -r httpClient Second step was to list the updates by executing ...

June 20, 2025 · 2 min · Cosmin

Fixing “Received Too Large SFTP Packet” When Connecting to vCenter Using WinSCP

The Problem When trying to connect to a vCenter Server Appliance (VCSA) using WinSCP, many admins encounter the following error: Received too large (1433299822 B) SFTP packet. Max supported packet size is 1024000 B This occurs because the default shell used by the vCenter appliance (/bin/appliancesh) is not compatible with SFTP, which WinSCP attempts to use by default. The Solution To successfully connect to VCSA and transfer files using WinSCP, you need to: ...

June 11, 2025 · 2 min · Cosmin
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Patching\Upgrading ESXi 8 to ESXi8U3b via esxcli

With the latest release of ESXi8U3b i wanted to get my lab up to date. I dont have enough resources in my lab to migrate the vCenter to another ESXi server so i want to perform the upgrade via cli. More details about the release can found here The first step was to open the firewall for outgoing traffic for http esxcli network firewall ruleset set -e true -r httpClient Second step was to list the updates by executing ...

November 9, 2024 · 1 min · Cosmin
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vCLS not starting with Failed - Feature 'cpuid.mwait' was absent, but must be present error

With the release of vCenter 7 Update 1, VMware introduced the vCLS (vSphere Clustering Service). More information can be found here. Looking at the error details it looks like it is looking for a feature called cpuid.mwait Reviewing the VMX file it seems like EVC is enabled on the vCLS VMs. I didnt want to enable EVC on the whole cluster so i wanted to do it only on the specific VMs. ...

July 28, 2024 · 2 min · Cosmin

Install/Upgrade ESXi 8.0 on unsupported hardware.

As i was installing\upgrading my lab environment to ESXi 7.0 i received an error that the CPU was unsupported. As per the release notes vSphere 8.0 release notes my CPU is no longer on the compatibility list. Since this is a lab environment i wanted to continue using my current hardware. It goes without saying that this method should not be used in a production environment. To allow the legacy CPU all I had to do is boot up from the ISO, on the boot Menu I pressed TAB or Shift + O and added allowLegacyCPU=True option as seen in the screenshot below ...

April 26, 2023 · 1 min · Cosmin

Removing NSX stale packages from ESXi host

I recently ran in to a problem where i wanted to perform a clean configuration of one of my ESXi hosts from an NSX perspective, however i ran in to a problem where NSX was reporting that the packages are already installed. To fix the issue i had to run the following to list the packages installed: esxcli software vib list | grep -i nsx Once i had the list all i had to do is uninstall them using: ...

March 3, 2023 · 1 min · Cosmin
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Patching\Upgrading ESXi 7 to ESXi7U1 via esxcli

With the latest release of ESXi7U1 i wanted to get my lab up to date. I dont have enough resources in my lab to migrate the vCenter to another ESXi server so i want to perform the upgrade via cli. More details about the release can found here The first step was to open the firewall for outgoing traffic for http esxcli network firewall ruleset set -e true -r httpClient Second step was to list the updates by executing ...

July 17, 2022 · 1 min · Cosmin
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vCLS not starting with Failed - Feature 'cpuid.mwait' was absent, but must be present error

With the release of vCenter 7 Update 1, VMware introduced the vCLS (vSphere Clustering Service). More information can be found here. Looking at the error details it looks like it is looking for a feature called cpuid.mwait Reviewing the VMX file it seems like EVC is enabled on the vCLS VMs. I didnt want to enable EVC on the whole cluster so i wanted to do it only on the specific VMs. ...

June 6, 2022 · 1 min · Cosmin
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Patching\Upgrading ESXi 7 to ESXi7U1 via esxcli

With the latest release of ESXi7U1 i wanted to get my lab up to date. I dont have enough resources in my lab to migrate the vCenter to another ESXi server so i want to perform the upgrade via cli. More details about the release can found here The first step was to open the firewall for outgoing traffic for http esxcli network firewall ruleset set -e true -r httpClient Second step was to list the updates by executing ...

October 28, 2020 · 1 min · Cosmin
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ESXi No space left on device error when upgrading

While i was trying to perform an upgrade to my ESXi installation i ran in to the below error: The fix was pretty simple. The hypervisor doesnt have enough space to download and install the package so we need to enable one of the available datastores for the function. For vCenter go to the host in question to Configure -> System -> System Swap While reviewing the configuration i noticed that i had 2 options enabled ...

October 28, 2020 · 1 min · Cosmin
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