How to Install Free VMware Hypervisor (ESXi)? |

VMware vSphere Hypervisor is a free, powerful, and reliable hardware hypervisor for server and workstation virtualization from market leader VMware. In this article, we’ll show you how to download, install, and configure VMware vSphere Hypervisor, create a virtual machine, and install a guest operating system.

Free VMware Hypervisor: Restrictions and Limitations

You can install VMware vSphere Hypervisor on a host that meets the following hardware requirements:

Minimum Recommended
CPU 1 processor, 2 cores Two processors, with four or more cores per CPU
Memory 4 GB 8 GB or higher
Network One 1Gbit/s network adapter Two 1Gbit/s network adapters
Local Storage (SATA/SAS) One 10 GB drive RAID 1 with two 10 GB drives

The VMware vSphere Hypervisor installation ISO image is quite small (630 MB) and contains only the most important drivers mainly for branded servers. Top vendors often release their own hypervisor distributions with their additional drivers. Separate ISOs with ESXi images from HPE, Dell, IBM, and Cisco are available from the VMware website.

Before downloading the ESXi image, check that your server hardware is supported in the VMware Hardware Compatibility Guide ( Be sure to check the CPU (must have Intel VT-x or AMD RVI support), network card, and hard disk controller.

The list of hardware that is not supported in ESXi 8.0 is described in the article – Devices deprecated and unsupported in ESXi 8.0 (88172)

Here are the main limitations of the free vSphere Hypervisor in comparison to the full version of VMWare ESXi:

The only difference between the vSphere Hypervisor and VMWare ESXi is in the license that is applied to it. The same installation ISO image is used.

  1. The official VMWare support is not provided;
  2. You cannot allocate more than 8 virtual processors/cores (vCPU) to one VM (by the way, the maximum number of vCPUs allowed for gen1 VMs is 64 in the free Windows Hyper-V Server);
  3. You cannot connect a host to the vCenter server;
  4. vStorage API is not available (you won’t be able to configure normal backup. For example, you can’t use free Veeam edition to backup your VMs);
  5. There can be more than 2 physical processors (sockets) on a server (there are no restrictions on the number of cores);
  6. All APIs are available in read-only mode (for example, you won’t be able to change any of the server or VM parameters via PowerCLI);
  7. The free vSphere Hypervisor key can be used to activate the license on 100 physical hosts.

However, the free version of vSphere Hypervisor allows you to use all CPU cores and RAM of a physical server without any restrictions. There are no limits on total RAM, processors, cores, or host or VM uptime. PCI VMDirectPath/ USB redirection features are also available.

There is also a VMware ESXi evaluation license that lets you use all Enterprise Plus features for 60 days.

How to Download VMware vSphere Hypervisor (ESXi)?

The latest version of the VMware vSphere 8 hypervisor can be downloaded from the following link To do it, sign in to your VMWare account or create a new one.

VMware vSphere 8.0 (ESXi 8.0) is the latest version of the hypervisor that was released on October 11, 2022.

Submit a request and wait for the license key for the free hypervisor and the VMware vSphere Hypervisor download link to appear. Be sure to save the license key.

Download VMware vSphere Hypervisor 8

How to Install VMWare vSphere Hypervisor (ESXi)?

Once you have downloaded the ISO image of the ESXi hypervisor, you will need to use the Rufus tool to burn it to a USB flash drive. Then connect the ESXi installation stick to the target server and boot from the media.

Installing ESXi is very simple:

  1. Confirm to start installing VMware ESXi 8.0.0 ;VMware ESXi 8.0.0 installer
  2. Select the local drive or SD card where you want to install the VMWare operating system. A minimum 10 GB drive is recommended; select esxi storage device
  3. Select the keyboard layout;
  4. Enter and confirm the root password (at least 7 characters);
  5. After installation is complete, remove the installation flash drive and restart the host. remove esxi installation media
If your CPU is not supported by ESXi, then an error will appear during installation:

Unsupported CPU:
CPU_SUPPORT_ERROR: The CPU in this host is not supported by ESXI 8.0.0

You can ignore CPU compatibility in a non-production environment with the allowLegacyCPU=true option. You can enable this option by pressing Shift+O while booting ESXi and running the command:

<ENTER: Apply options and boot>

> cdromBoot runweasel allowLegacyCPU=true

VMware vSphere Hypervisor has been installed. If your ESXi host is connected to a network with a DHCP server, it will automatically receive an IP address, which you will see in the hypervisor console (called the Direct Console User Interface, DCUI). This IP address is used to manage the hypervisor from the web interface.

vmware esxi dcui
Press F2 and enter the user name (root by default) and password (you have set during installation) to manage VMware Hypervisor settings from the DCUI.

The DCUI graphical console will open for the initial configuration of the hypervisor.

configure esxi via dcui

Here you can set the following options:

  1. Configure Password — change root password;change root password
  2. In the Configure Management Network section, you can configure management network adapters (in this example, there is only one network adapter on the server); esxi configure network adapters
  3. You can specify the VLAN number, in which the server management interface is located;set vlan
  4. Configure IPv4 and IPv6 network interface. You can disable them, assign dynamic, or static IP addresses. In most cases, an IP address, a subnet mask, and a default gateway address are set manually on the VMWare ESXi hosts;ipv4 configuration esxi
  5. DNS Configuration – here you can set the primary and secondary DNS servers and set the hostname; set dns on vmware hypervisor
  6. In the Test Management Network section, you can test the network connectivity (using ICMP ping) and DNS name resolution. Usually, it is worth checking the availability of your gateway IP and servers in another network segment (you can specify the address of your DNS server); dcui Test Management Network
    Here are the results of the test:
    esxi test network with ping
  7. In the Troubleshooting Mode section, you can: enable SSH on the VMware host, access ESXi Shell, configure timeouts, and restart ESXi management agents.ESXi DCUI Troubleshooting Mode

The initial VMware vSphere Hypervisor configuration is now complete. You can connect to it through the web interface.

Configure VMware ESXi via Host Client Web Interface

The ESXi Host Client web interface is the basic VMware Hypervisor management interface. To connect to the web interface, open a browser on your computer and enter the IP address of your ESXi host (which is displayed in the DCUI console) into the address bar. Sign in with root credentials.

vmware esxi host client web interface

Note that the following message is displayed in the Host Client console:

You are currently using ESXi in evaluation mode. This license will expire in 60 days.

You are currently using ESXi in evaluation mode. This license will expire in 60 days.

Activate the vSphere Hypervisor key/license you received from the VMware website: Manage -> Licensing -> Assign License.

 Activate VMware Hypervisor free license

If you don’t activate the VMWare license, after 60 days all running VMs will continue to work, however, you won’t be able to power on new VMs or restart the existing ones.

You have activated a permanent (Expires: Never) hypervisor license with an unrestricted amount of RAM size for virtual machines. You can allocate up to 8 virtual CPUs (Up to 8-way virtual SMP) for each virtual machine.

Basic ESXi settings are located in the Manage section.

First, it is recommended to set the correct time. You can set the NTP connection setting under “Manage” -> “System” -> “Time&date” -> “Edit settings”. Or set the exact time here manually.

esxi set ntp

In the Networking section, you can manage virtual networks. One of the basic concepts in VMware Hypervisor is a virtual switch.

The vSphere Switch (or vSwitch) is a virtual device that transfers data between virtual machines on the ESXi host or outside through a physical NIC. There are two types of virtual switches:

  • Standard Switch is a simple virtual switch logically located inside a physical server.
  • Distributed Switch – a virtual switch that can be distributed to multiple physical hosts (not available in the free VMWare Hypervisor version, you can use it only in the Enterprise Plus edition of the VMWare vSphere).

After you install and run your hypervisor, there is a built-in virtual switch (vSwitch0), which includes a physical adapter (vmnic0), and two port groups: a service one (Management Network) to manage your hypervisor and a data network for VMs (VM Network). The vmk0 hypervisor management interface (vmkernel port) is added to the Management Network port group.

esxi networking vswitch0

In most cases, one virtual switch on a stand-alone hypervisor will be enough. You have to create additional port groups if you want to isolate virtual machines from each other and use different VLAN settings for port groups.

Unless necessary, do not make any changes to Management Network or vmkernel port, or you may lose access to your hypervisor management interface. If you have lost access to your hypervisor, you can reset network settings using Restore Network Settings option in the DCUI console.

The next step is to create storage for the virtual machine files. ESXi allows you to use local disks or USB flash drives for VM storage (it is officially not recommended to use USB flash drives for VMFS), as well as external storage connected to the VMWare host via iSCSI, NFS, or Fiber Channel.

In this example, we will use the local disk storage. Go to Storage -> Devices and check what local drives are available (in some cases you need to click Rescan to detect it).

Select disk device for VMFS datastore

Then go to the Datastore tab and select New Datastore.

create VMFS datastore

Specify a datastore name and select the device (drive) where to create it. VMFS is a VMware file system (you can also access the VMFS datastore from Windows and Linux).

select device to create VMFS partition

Choose that you will use the entire disk for the VMFS datastore.

Creating a Virtual Machine in VMWare Hypervisor

Now you can create and run virtual machines in VMware Hypervisor.

Select Virtual Machines -> Create / Register VM -> Create a new virtual machine in the web interface.

vmware esxi - create new vm

Specify a name for the virtual machine. Select the type and version of the guest operating system. In my example:

  • Guest OS Family: Windows
  • Guest OS Version: Microsoft Windows Server 2022 (64 bit)

Enable the “Windows Virtualization Based Security” checkbox if you want to make IOMMU, EFI, and Secure Boot available to the guest OS.

Set VM name and guest OS family, version

This article describes how to install Windows 11 in a guest OS on VMware ESXi.

Select the datastore you created earlier, where the virtual machine’s configuration files and virtual hard disks will be stored.

select VM storage

If there is not enough free space on the storage, a message will appear telling you to increase the size of the VMFS datastore.

In the next step, the basic parameters of the virtual machine are configured: the number of CPUs, the RAM size, the size of the virtual hard disk, network adapters, CD/DVD drives, etc.

To connect a VM to the network, you need to place its virtual network adapter to the VM Network port group on the vSwitch0 (if you have not reconfigured anything).

You can change all VM settings afterward.

Set CPU Count and RAM for VMware Virtual Machine

If you try to allocate more than 8 vCPUs for a VM, you will see this error: “Failed to power on virtual machine. There are insufficient licenses to complete this operation”. This is a limitation of the license for the free version of vSphere Hypervisor.

On the next screen, you will be asked to check and confirm all the settings of the virtual machine.

Now you need to install the operating system (the guest operating system) in the VMware virtual machine.

Upload the installation image (ISO file) with the OS distribution to the VMware datastore. Select your VMFS datastore under Storage and click Datastore Browser.

Create a new directory for your ISO images. Click Upload in the top left corner, select the ISO file you want to upload, and wait for the upload to complete.

Upload windows iso to vmware datastore

Now open your virtual machine settings (“Edit Settings”).

Specify that you want to mount the image from the Datastore ISO file in the CD/DVD Drive section. Click the Browse button and select your ISO file. Enable the Connect and Connect at startup options.

VMware VM: mounting an ISO image

Then just start the virtual machine (with the Power On button).

Start VM on ESXi

Click the Console tab to open the virtual machine console. The virtual machine will attempt to boot from the ISO image and begin installing the guest operating system.

Installing Guest Windows OS to VMWare Virtual Machine

Continue and finish installing Windows in the VM.

Make sure to install the VMTools package (a set of drivers and services for a virtual machine) after the guest OS installation is complete. From the VM menu, select Guest OS -> Install VMware Tools.

Install Vmware Tools

Open the virtual CD drive in the guest OS and run setup.exe.

It is hoped that this short overview article will be a good starting point for you to get started using the free VMWare vSphere Hypervisor.

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