1.    4 Weeks Ago #1
    Join Date : Oct 2017
    Posts : 6
    Always latest version of Windows 10 (not insider)

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


    Hello,

    after update to Fall Creators Update i cannot delete vEthernet (Default Switch) in Hype-V. When deleted from connections in control pannel it is created again after reboot. If disabled it stays after reboot but new connection with #2 is created. When clicking delete in Hyper-V Manager -> Virtual Switch Manager it does not do anything. Anybody has Hyper-V installed here and could confirm if the issue is the case also in his computer? If anyone found solution how to permanently delete that connection please share the knowledge.

    My VMs are all offline and i dont need additional conenctions in my system. Any help appreciated. Thank you!

    Regards.
      My ComputerSystem Spec
  2.    4 Weeks Ago #2
    Join Date : Dec 2015
    Posts : 5,960
    Windows10

    Previously you had to mess around using virtual switch manager to create a connection to network. Now you just select default switch if you like.

    This option is essential for quick creating a new hyper-v session.

    It is only used in existing sessions if you explicitly add it to a particular VM session.

    Deleting it will not provide any additional security, or prevent other users creating a virtual switch.

    Deleting things without understanding their functionality is surefire way to break things!
      My ComputerSystem Spec
  3.    4 Weeks Ago #3
    Join Date : Oct 2017
    Posts : 6
    Always latest version of Windows 10 (not insider)
    Thread Starter

    Quote Originally Posted by cereberus View Post
    Previously you had to mess around using virtual switch manager to create a connection to network. Now you just select default switch if you like.

    This option is essential for quick creating a new hyper-v session.

    It is only used in existing sessions if you explicitly add it to a particular VM session.

    Deleting it will not provide any additional security, or prevent other users creating a virtual switch.

    Deleting things without understanding their functionality is surefire way to break things!
    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.
      My ComputerSystem Spec
  4.    4 Weeks Ago #4
    Join Date : Oct 2013
    A Finnish expat in Germany
    Posts : 12,974
    Windows 10 Pro

    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:
    The switch named “Default Switch” or “Layered_ICS”, allows virtual machines to share the host’s network connection. Without getting too deep into networking (saving that for a different post), this switch has a few unique attributes compared to other Hyper-V switches:
    1. Virtual machines connected to it will have access to the host’s network whether you’re connected to WIFI, a dock, or Ethernet.
    2. It’s available as soon as you enable Hyper-V – you won’t lose internet setting it up.
    3. You can’t delete it.
    4. It has the same name and device ID (GUID c08cb7b8-9b3c-408e-8e30-5e16a3aeb444) on all Windows 10 hosts so virtual machines on recent builds can assume the same switch is present on all Windows 10 Hyper-V host.
    Kari
      My ComputerSystem Spec
  5.    4 Weeks Ago #5
    Join Date : Dec 2015
    Posts : 5,960
    Windows10

    Quote Originally Posted by Kari View Post
    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:


    Kari

    Out of interest, I changed my network switch to "default switch" in one of my VMs and connected using vmconnect from hyper-v, and it worked fine. Only odd thing was if you hovered mouse pointer over the network symbol in taskbar, the popup was blank.

    Then I closed down vmconnect session leaving vm running, and tried to connect using an RDP session. I reverted VM to the switch I had originally setup, and rdp connected as usual.

    This may be a consequence of it not being setup with default switch originally - I will have to test that.
      My ComputerSystem Spec
  6.    4 Weeks Ago #6
    Join Date : Oct 2013
    A Finnish expat in Germany
    Posts : 12,974
    Windows 10 Pro

    Quote Originally Posted by cereberus View Post
    Then I closed down vmconnect session leaving vm running, and tried to connect using an RDP session. I reverted VM to the switch I had originally setup, and rdp connected as usual.
    Default switch is using NAT, making networking and remoting if not impossible but at least quite difficult. If you want to allow network access to other physical or virtual computers on your network, you should use a normal external switch created by yourself. Using default switch (NAT) is only recommended if the VM only needs Internet access but don't have to be accessible for computers on your local network or to access them.

    Kari
      My ComputerSystem Spec
  7.    4 Weeks Ago #7
    Join Date : Dec 2015
    Posts : 5,960
    Windows10

    Quote Originally Posted by Kari View Post
    Default switch is using NAT, making networking and remoting if not impossible but at least quite difficult. If you want to allow network access to other physical or virtual computers on your network, you should use a normal external switch created by yourself. Using default switch (NAT) is only recommended if the VM only needs Internet access but don't have to be accessible for computers on your local network or to access them.

    Kari
    Thanks - was just curious really.
      My ComputerSystem Spec

 


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