Windows 10: Hyper-V- Win 10 1809: Permanently Delete Default Switch

Good day,


In prior versions of Windows 10 I was fairly certain my deleting of Default Switch was permanent. When the Default switch is deleted it almost instantly is recreated. I cant for the life of me understand why this switch is mandatory. I have used Hyper-V for a few years now and have never needed the switch. When I try to disable the switch it turns itself back on.


I find this feature to be extremely annoying.


Anyone have a real way to remove this so it never ever returns?


Powershell command being used:

Get-HNSNetwork | ? Name -Like "Default Switch" | Remove-HNSNetwork


Appreciate any information you can provide.


-Scott

:)

 

Hyper-V Default Switch Repetitive Re-creation on Windows 10 1809 (10.0.17763)

On Thursday 2018-10-04 my host development PC + several guest Windows 10 machines all updated to the latest Windows 10 1809 feature release apparently without incident.

My guest machines use the Hyper-V default switch for their NAT networking which has worked effectively for the past year.

I have just noticed however every time you reboot the host, the default switch is getting deleted and then recreated and hence allocated a new network identity and IP address (the Hyper-V default switch uses /28 network for its NAT network). The event log
confirms the adapter deletion and re-creation events following a reboot.

The effect of this is that each guest is constantly seeing a new network following a host reboot. This is not correct behaviour and the in the past the identity of the default switches network adapter remained stable between reboots and consequently its
assigned /28 network also remained stable.

I have some Windows 10 guest machines with Hyper-V installed within the guest (required for virtual device development). This guest machines also have a nested default switch which also exhibits the same delete/recreate behaviour following a guest machine
restart.

I was tempted to roll back of the feature update on the host, but have since noticed I am beyond the 10 days grace period for feature roll back which seems a very short time.

Consequently I am stuck with the behaviour for the present.

I am hoping a fix for this will be available for this bug in the future.

As a side not I wish Microsoft would give us control of the IP address assigned to the Hyper-V default switch.

 

Hyper-V. Cannot delete "Default Switch" after Fall Creators Update.


Default switch cannot be deleted. If its existence disturbs you, you might want to remove Hyper-V from your system and use another virtualisation program instead.

Quote from Hyper-V virtual machine gallery and networking improvements | Virtualization Blog:

 

Hyper-V. Cannot delete "Default Switch" after Fall Creators Update.

When default switch is deleted the VMs start alright so for me there is no need to keep that switch in the system as i want them all offiline. There is also remove button for the switch in Hyper-V Manager but it simply does not work. I don't think is crucial to keep default switch when you don't need any network access for your VMs.

If someone will find solution how to permanently delete default Hyper-V switch please share the knowledge. Thank you.