Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging

The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.

Check out The OSR Learning Library at:

Hypervisor Debugging between two Hyper-V VMs

TooLazyToBlinkTooLazyToBlink Member Posts: 1
edited April 2021 in WINDBG


I want to start by saying that I can do this using debugging between two VMs when using VMware Workstation. This works using kernel debugging over networking using the hypervisor settings in BCDEDIT as follows:

Kernel Debugging: 

bcdedit /debug on
bcdedit /dbgsettings net hostip:<IP> port:50020
bcdedit /set "{dbgsettings}" dhcp No

Hypervisor Debugging: 

bcdedit /set hypervisordebug on
bcdedit /hypervisorsettings net hostip:<IP> port:50021
bcdedit /set "{hypervisorsettings}" hypervisordhcp No

This works for both kernel and hypervisor debugging on VMware Workstation. When I try this inside Hyper-V using a private switch or external switch I can get kernel debugging to work without a problem but the hypervisor session never connects. I've tried this using COM ports and again no dice.

The only way I was able to successfully debug the hypervisor when it comes to Hyper-V is using a COM port and doing the debugging directly on the host rather than on a different VM but this doesn't really work for my needs.

I've also tried this: but without success.

Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Internals & Software Drivers 7 February 2022 Live, Online
Kernel Debugging 21 March 2022 Live, Online
Developing Minifilters 23 May 2022 Live, Online
Writing WDF Drivers 12 September 2022 Live, Online