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code 31 on microsoft virtual machine bus network adapter for server 2008

Posted on 2009-05-05
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Last Modified: 2013-11-06
Hi,

after my losing a virtual instance of server 2008 and xp pro, i recreated the virtual machines and reattached vhd's. XP came back up fine, but the server 2008 VM will not connect to my lan. I am getting errors - code 31 and network diagnostics comes back with result "The network adapter 'Microsoft Virtual Machine Bus Network Adapter' is experiencing driver or hardware related issues - but no solution is offered (surprise, surprise!)

Any help in troubleshooting this would be greatly appreciated.

James
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Question by:betterlifedirections
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by:Rob Williams
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Have you tried forcing installation of "integration services"?
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by:betterlifedirections
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I have reinstalled integration services - is asked if I want to repair the existing installation - which I responded yes to. Problem still not fixed

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by:Rob Williams
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Interesting. Are there "unknown" devices showing up on the VM in device manager?
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by:betterlifedirections
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no unknown devices showing up
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by:Rob Williams
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Very interesting. The error was more common on 2003 and when occurring there would be unknown network devices in device manger.
Perhaps someone else more familiar with the problem will have better suggestions.
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by:betterlifedirections
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My setup is server2008 parent running Hyper-V. Child virtual instances are sbs2008, server 2008 and xp pro. one virtual network adapter (called SBS LAN) which is supposed to be shared by all three instances. SBS2008 (as domain controller) and XP are working fine and connecting to the "external" lan. Server 2008 is not. Weird thing is that it WAS all working, then I had a crash where server 08 and xp instances disappeared - which I figured might have been due to the well documented Trend/AV problems - this problem is now corrected by excluding XML and one other extension, recreating the 2 x VMs and reattaching the VHDs.
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can anyone else help?
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