Windows 10: Hyper-V. Cannot delete "Default Switch" after Fall Creators Update.

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  1. Posts : 6
    Always latest version of Windows 10 (not insider)
       21 Oct 2017 #1

    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.    21 Oct 2017 #2

    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. Posts : 6
    Always latest version of Windows 10 (not insider)
    Thread Starter
       21 Oct 2017 #3

    cereberus said: 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. Posts : 14,401
    Windows 10 Pro
       22 Oct 2017 #4

    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.    22 Oct 2017 #5

    Kari said: 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. Posts : 14,401
    Windows 10 Pro
       22 Oct 2017 #6

    cereberus said: 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.    22 Oct 2017 #7

    Kari said: 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

  8.    29 Nov 2017 #8

    The only way I could make my VMs accessible to other devices on my local network was to create a new additional external switch bound to a second network card. I unticked the option "Allow management operating system to share this network adapter" so my desktop wouldn't try to use it itself. I was then able to connect to my VMs via http/https/ssh (or whatever) from any of the other PCs on my physical LAN.

    Hope this helps.
      My ComputerSystem Spec

  9.    29 Nov 2017 #9

    nj101 said: View Post
    The only way I could make my VMs accessible to other devices on my local network was to create a new additional external switch bound to a second network card. I unticked the option "Allow management operating system to share this network adapter" so my desktop wouldn't try to use it itself. I was then able to connect to my VMs via http/https/ssh (or whatever) from any of the other PCs on my physical LAN.

    Hope this helps.
    This is not necessary, and is just over complicated.

    You just set up C drive in VM as a private shared drive, with full permissions for "everyone", setting up password as required from network and sharing centre (I turn off password personally). You use an external switch, not "default switch". I use this to share drives with Host when using Home as a VM which does not support RDP as a server so cannot be used in enhanced mode.

    This works fine for windows to windows share, but more effort is needed for android to windows shares.
      My ComputerSystem Spec


  10. Posts : 32
    Windows 10 Pro for Workstations
       03 Dec 2017 #10

    Once the Hyper-V role is installed on the system, it takes your network card and assigns it to the virtual switch, then creates a virtual network adapter for the end-user.

    It's quite an abysmal default setup, especially if you have only one network adapter, but from what I've read on the developer forums, they are looking to make it optional.
      My ComputersSystem Spec


 
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