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hyper-v keeps disconnecting

    Question

  • Hi,

    My hyper-v windows XP machine keeps disconnecting from network.

    When I start the VM everything is fine I have connection to internet but every 2-4 minutes I loose connection. Sometimes the connection gets back after 30 sec and sometimes it never gets back until I disable and re-enable the network bridge from the virtual switch.

    The host machine has no network issues and is connected 100 % whole time.

    Environment:

    Host: Dell Laptop, Windows 8.1, Wireless network card, virtual switch on wireless network card (external connection type with allow management operating system to share adapter).

    Hyper-v VM windows XP.

    How to fix this?

    Thanks in advance.

    Friday, November 01, 2013 12:51 PM

Answers

  • Unfortunately not.  It sounds like it may be an incompatibility between
    the wireless NIC and Hyper-V.  Wireless NIC's have always been a problem
    because they don't always support everything needed for something like
    hyper-V.  It's better in the current version of Hyper-V than before, but
    it's still not perfect.  Changing NIC's or waiting for driver updates is
    about it.
     
     
     

    Bob Comer - Microsoft MVP Virtual Machine
    Saturday, November 02, 2013 1:57 PM

All replies

  • I'd first check to see if there is an updated driver for your wireless NIC on the host.
     
     

    Bob Comer - Microsoft MVP Virtual Machine
    Friday, November 01, 2013 2:01 PM
  • Hi Bob, I Have the latest driver but thanks for your reply
    Friday, November 01, 2013 2:13 PM
  • It was worth a shot.
     
    The next thing to try is to turn off all TCP and UDP task offloading in the NIC's device settings and the VM settings.
     
     

    Bob Comer - Microsoft MVP Virtual Machine
    Friday, November 01, 2013 2:21 PM
  • Since this is a laptop - disable all power savings setting on the wireless card.

    The driver could be putting the NIC into a low power state, a sleep state, or turning it off all together when the management OS is not using the internet.

    these power savings features of the NIC driver are never compatible with VMs.


    Brian Ehlert
    http://ITProctology.blogspot.com
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

    Friday, November 01, 2013 3:48 PM
  • I was not sure how to disable offloading and have google it and have been playing around with registry but nothing helped...

    Any other ideas?

    Saturday, November 02, 2013 12:05 PM
  • all power savings are disabled and when I test the VM I keep pinging something from the host to be sure that the host has connection and it is always 100%...


    Saturday, November 02, 2013 12:07 PM
  • Unfortunately not.  It sounds like it may be an incompatibility between
    the wireless NIC and Hyper-V.  Wireless NIC's have always been a problem
    because they don't always support everything needed for something like
    hyper-V.  It's better in the current version of Hyper-V than before, but
    it's still not perfect.  Changing NIC's or waiting for driver updates is
    about it.
     
     
     

    Bob Comer - Microsoft MVP Virtual Machine
    Saturday, November 02, 2013 1:57 PM