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"Ghost" (Hidden) Network Adapters

    Question

  • I have noticed that every time a VM is shout down and dealocate, as soon as it start up again a new network adapter is created with a # at the end of its name.

    Some times our VM had connectivity issues when trying to access shared folders or even connecting to the AD. Did some research online an that was caused because of the ghost network adapters created every time a VM is turned off and on again.

    To resolve those issues I had to go to the device manager (since I have only Windows machines), select to show hidden devices and then uninstall all ghost network adapters.

    I need azure to stop creating those network adapters or get a tool or script to remove them every time the server is started.

    Found this forum complaining about the same thing but no one answered it.

    http://social.msdn.microsoft.com/Forums/es-ES/21c1918c-2cc6-497f-9681-0d7c30bb0188/vms-in-virtual-network-w-sts-lose-connectivity?forum=WAVirtualMachinesVirtualNetwork

    Monday, September 8, 2014 5:37 PM

Answers

All replies

  • Hi,

    Thanks for the helpful post here.

    Apologies for the inconvenience caused. I appreciate your efforts in resolving the issue

    I would convey the message to the concerned team.  However, recommend you to give your feed back at http://feedback.azure.com/forums/216843-virtual-machines which is a dedicated feedback forum.

    Regards,

    Shirisha Paderu.

    Monday, September 8, 2014 6:17 PM
    Moderator
  • Your connectivity issues may result due to a IP address change of the VM (DIP) or the Cloud Service (VIP) depending on how you connect to your VM.

    Options:
    If you have a site-to-site VPN and connect directly to the DIP you should set a static DIP by using PowerShell:
    http://michaelwasham.com/windows-azure-powershell-reference-guide/setting-static-ip-addresses-in-a-virtual-network/

    If you connect to your VM over the internet to via the Cloud Service thru a port you should set a static VIP:
    http://msdn.microsoft.com/en-us/library/azure/dn690120.aspx

    Friday, September 12, 2014 8:42 AM
  • Thank you for the reply, I will take a better look into your notes tomorrow morning.

    By the way, I can tell you that we have a virtual network in azure and all servers are within it. 
    To keep the same IP on each server,  they are restarted aways in the same order. 
    We have 3 windows 2012 servers and two Windows 2008 servers, today I noticed that the windows 2008 server stopped seeing other servers shared folders, however the windows 2012 servers can connect to any shared folder.

    Also in Windows server 2008 is not possible to remove hidden network adapters, they do not appear in the device manager.

    This was working normally until 2 or 3 days ago and we did not make any changes.

    This is turning me crazy! It is the second time it happens and the last time I had to rebuilt a complete server.

    I will appreciate any help to resolve this ASAP.

    Thanks in advance

    Thursday, September 25, 2014 3:21 AM