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Virutalization Error on Laptop trying to load CML

ckeithnc
Level 1
Level 1

I have tried to load Cisco Modeling Lab 2.7 and 2.4 on two different PC laptops (Samsung and Asus). Both machines met the system requirements to run CML. I used VMware Workstation Pro as the host and on both machines I was running Windows 11 Pro. When I try to run the VM for CML I receive an error saying that I need to ensure Virtualization is enabled. When I researched this, I was directed to check to ensure Virtualization was enabled on the BIOS. On the BIOS for both machines, that is not an option. I opened a ticket with Asus regarding the issue to verify virtualization regarding the BIOS and they have basically told me to go to Best Buy, never answering the question. Can anyone advise on this? I can still take the laptop back to Best Buy if I need to buy a different one, but I have to admit, the Asus ProArt 16 is a fairly nice machine (except for the fact it can't do the one thing I need it to do, lol)

I am trying to run Cisco Modeling Lab on a PC laptop with Windows Pro 11 using VMware Workstation Pro.

1 Accepted Solution

Accepted Solutions

mpeerenboom
Level 1
Level 1
If you're referring to the ASUS ProArt 16 (e.g. StudioBook 16 or similar 16‑inch models) and its support for VMware virtualization—here's what the current specs show:
________________________________
Virtualization Support (VT‑x & VT‑d)
These are confirmed features in many ASUS ProArt 16 models:

*
ASUS ProArt StudioBook 16 OLED (e.g. H7600ZM or H7600ZW variants):
*
Supports Intel VT‑x (with EPT) and Intel VT‑d, enabling full virtualization and directed I/O, both critical for advanced VM setups. (Kelaptop<>, Micro Center<>, Quzo UK<>).

________________________________
What This Means for VMware
With both VT‑x and VT‑d hardware support:

*
You should be able to run VMs within VMware and perform operations like PCI device passthrough (e.g. GPU passthrough) when combined with proper BIOS/UEFI and driver support.
*
For nested virtualization (i.e., running a hypervisor inside a VM on VMware), note that VMware may still refuse to enable VT‑x/EPT—even when available in hardware—due to conflicts like Windows Hyper‑V, Core Isolation, or Virtualization-Based Security (VBS). (Reddit<>).

Some users have reported VMware errors like "Virtualized Intel VT‑x/EPT is not supported on this platform", which are often due to such software conflicts rather than a lack of hardware capability. (Reddit<>)
________________________________
BIOS Setup Tip
On ASUS systems, Intel virtualization features are typically enabled by default. You can double-check or adjust this by entering BIOS/UEFI during boot (press Del or F2), switching to Advanced Mode, and navigating to Advanced → CPU Configuration to confirm that “Intel (VMX) Virtualization Technology” (including VT‑d) is enabled. (ASUS Global<>)
________________________________
Quick Summary
Model / Variant
VT‑x (EPT)
VT‑d
VMware Nested VM (Potential conflicts)
ProArt StudioBook 16 OLED
Yes
Yes
May need BIOS and OS config adjustments
VMware nested virtualization


Needs software conflicts disabled
________________________________
Recommendations for Smooth VM Experience

1.
Enter BIOS/UEFI and ensure virtualization features (VT‑x and VT‑d) are enabled.
2.
In Windows, disable:
*
Hyper-V features
*
Virtualization-Based Security (VBS)
*
Core Isolation / Memory Integrity
Sometimes Windows updates or registry quirks can re-enable them even after being turned off. (Reddit<>)
3.
Use VMware's VM settings to enable VT‑x/EPT inside the guest.
4.
If you encounter errors about unsupported VT‑x/EPT in VMware—even when BIOS shows it's enabled—check for lingering hypervisor features and reboot after disabling them.

________________________________
Let me know if you’d like help stepping through BIOS settings, adjusting Windows security features, or troubleshooting a specific error in VMware.

View solution in original post

13 Replies 13

I had not accessed BIOS/UEFI in that fashion before, but I did so as per the instructions on the link. Per all the doucumentation I have seen, the Virtualization settings should be under Advanced Settings, but there is nothing there. The value is not listed anywhere in the BIOS/UEFI

mpeerenboom
Level 1
Level 1

If you're referring to the ASUS ProArt 16 (e.g. StudioBook 16 or similar 16‑inch models) and its support for VMware virtualization—here's what the current specs show:


Virtualization Support (VT‑x & VT‑d)

These are confirmed features in many ASUS ProArt 16 models:

  • ASUS ProArt StudioBook 16 OLED (e.g. H7600ZM or H7600ZW variants):

    • Supports Intel VT‑x (with EPT) and Intel VT‑d, enabling full virtualization and directed I/O, both critical for advanced VM setups. (Kelaptop, Micro Center, Quzo UK).


What This Means for VMware

With both VT‑x and VT‑d hardware support:

  • You should be able to run VMs within VMware and perform operations like PCI device passthrough (e.g. GPU passthrough) when combined with proper BIOS/UEFI and driver support.

  • For nested virtualization (i.e., running a hypervisor inside a VM on VMware), note that VMware may still refuse to enable VT‑x/EPT—even when available in hardware—due to conflicts like Windows Hyper‑V, Core Isolation, or Virtualization-Based Security (VBS). 

Some users have reported VMware errors like "Virtualized Intel VT‑x/EPT is not supported on this platform", which are often due to such software conflicts rather than a lack of hardware capability. 


BIOS Setup Tip

On ASUS systems, Intel virtualization features are typically enabled by default. You can double-check or adjust this by entering BIOS/UEFI during boot (press Del or F2), switching to Advanced Mode, and navigating to Advanced → CPU Configuration to confirm that “Intel (VMX) Virtualization Technology” (including VT‑d) is enabled. 


Quick Summary

Model / Variant VT‑x (EPT) VT‑d VMware Nested VM (Potential conflicts)

ProArt StudioBook 16 OLEDYesYesMay need BIOS and OS config adjustments
VMware nested virtualizationNeeds software conflicts disabled

Recommendations for Smooth VM Experience

  1. Enter BIOS/UEFI and ensure virtualization features (VT‑x and VT‑d) are enabled.

  2. In Windows, disable:

    • Hyper-V features

    • Virtualization-Based Security (VBS)

    • Core Isolation / Memory Integrity
      Sometimes Windows updates or registry quirks can re-enable them even after being turned off. (Reddit)

  3. Use VMware's VM settings to enable VT‑x/EPT inside the guest.

  4. If you encounter errors about unsupported VT‑x/EPT in VMware—even when BIOS shows it's enabled—check for lingering hypervisor features and reboot after disabling them.


 

mpeerenboom
Level 1
Level 1
If you're referring to the ASUS ProArt 16 (e.g. StudioBook 16 or similar 16‑inch models) and its support for VMware virtualization—here's what the current specs show:
________________________________
Virtualization Support (VT‑x & VT‑d)
These are confirmed features in many ASUS ProArt 16 models:

*
ASUS ProArt StudioBook 16 OLED (e.g. H7600ZM or H7600ZW variants):
*
Supports Intel VT‑x (with EPT) and Intel VT‑d, enabling full virtualization and directed I/O, both critical for advanced VM setups. (Kelaptop<>, Micro Center<>, Quzo UK<>).

________________________________
What This Means for VMware
With both VT‑x and VT‑d hardware support:

*
You should be able to run VMs within VMware and perform operations like PCI device passthrough (e.g. GPU passthrough) when combined with proper BIOS/UEFI and driver support.
*
For nested virtualization (i.e., running a hypervisor inside a VM on VMware), note that VMware may still refuse to enable VT‑x/EPT—even when available in hardware—due to conflicts like Windows Hyper‑V, Core Isolation, or Virtualization-Based Security (VBS). (Reddit<>).

Some users have reported VMware errors like "Virtualized Intel VT‑x/EPT is not supported on this platform", which are often due to such software conflicts rather than a lack of hardware capability. (Reddit<>)
________________________________
BIOS Setup Tip
On ASUS systems, Intel virtualization features are typically enabled by default. You can double-check or adjust this by entering BIOS/UEFI during boot (press Del or F2), switching to Advanced Mode, and navigating to Advanced → CPU Configuration to confirm that “Intel (VMX) Virtualization Technology” (including VT‑d) is enabled. (ASUS Global<>)
________________________________
Quick Summary
Model / Variant
VT‑x (EPT)
VT‑d
VMware Nested VM (Potential conflicts)
ProArt StudioBook 16 OLED
Yes
Yes
May need BIOS and OS config adjustments
VMware nested virtualization


Needs software conflicts disabled
________________________________
Recommendations for Smooth VM Experience

1.
Enter BIOS/UEFI and ensure virtualization features (VT‑x and VT‑d) are enabled.
2.
In Windows, disable:
*
Hyper-V features
*
Virtualization-Based Security (VBS)
*
Core Isolation / Memory Integrity
Sometimes Windows updates or registry quirks can re-enable them even after being turned off. (Reddit<>)
3.
Use VMware's VM settings to enable VT‑x/EPT inside the guest.
4.
If you encounter errors about unsupported VT‑x/EPT in VMware—even when BIOS shows it's enabled—check for lingering hypervisor features and reboot after disabling them.

________________________________
Let me know if you’d like help stepping through BIOS settings, adjusting Windows security features, or troubleshooting a specific error in VMware.

So I did all of this and the same error. I appreciate the help, but all of this has been tried before. Thank you.

mattrendall23
Level 1
Level 1

im having this same problem with a Dell Pro Max 16 / Microsoft surface laptop 4

I empathize with you. Have you tried any of the solutions posted here? I can't believe I've had this much of a problem trying to run this software.

I went into the BIOS and disabled SecureBoot (Under Advanced>>Security) tab. When I rebooted, I had to find and type in my 48 Bitlocker key (had to use my phone to retrieve it from my Microsoft acct). I also had to reset my PIN on my laptop. I was able to get the CML free version to run. I think the virtualization issue is still occurring on the 2.7, but I haven't had time to really look into it. Anyway perhaps this is something that you can try to help move you further.

This is an issue with Windows 11, which has a security "feature" that prevents 3rd-party hypervisors from supporting nested virtualization by default. Follow the CML procedure for VMware to disable the feature, or switch to Hyper-V.

https://community.cisco.com/t5/network-management/cml-2-7-2-not-working-in-vmware-workstation/td-p/5303694

 

Disclaimers: I am long in CSCO. Bad answers are my own fault as they are not AI generated.

I have tried this and there were some new config changes I had not tried before. I did have some issues with the PowerShell script. I did run it, but I'm not sure exactly what to expect. The issue persists.

YMMV, but the CML procedure worked for my installation of CML-Free on WMware Workstation on Windows 11 Pro. The hoped-for result is that the CML installation completes without error and without any alerts being thrown by VWware or CML about VTx support.

If all else fails, you might try CML on Hyper-V, which I have not yet been able to get running, but I expect to try again with CML 2.9.0.

Disclaimers: I am long in CSCO. Bad answers are my own fault as they are not AI generated.

mpeerenboom
Level 1
Level 1

Try GNS3. More stable, less issues. 

rkochery
Cisco Employee
Cisco Employee

Hi @ckeithnc , If you are using Windows PRO, you do not have to go through the hassle of disabling Hyper-V and installing on Workstation. You can directly install CML in Hyper-V manager which is available by default in Windows PRO and Enterprise versions, please find the instructions here, https://github.com/CiscoDevNet/cml-community/blob/master/documentation/cml_on_hyperv.md