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My company have one domain controller(win2008 R2) & One Hyper-V Host(win2008 R2 and join in the domain,one network adapter for host management and another one for VM switch).

The issue now is:It is very slow when joining the guest(win 2008 R2) to domain! After joining the domain, when i try to add permission to folder or access the other server from network it will come out the below error msg while ping to domain controller will be interrupted! Any suggestion? The Ping will be OK if you never do any other things on guest OS! Thanks! enter image description here

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How does it work frmo the host? I run a lot of also heavy duty VM's, and I dont ahve the issue ever. I would suggest a driver / caling / swith issue somewhere. Especially "Destination host unreachable" indicates at least an ARP resolution issue which just should not happen. Is the network hopelessly overlaoded? –  TomTom Apr 11 '11 at 9:54
    
Hi, this only happen on guest OS only. From the host and other server,all is OK. –  e0594cn Apr 11 '11 at 13:17
    
This is funny. Never seen this before. Is the network driver crurent on the host? using enlightment, or the classical / legacy adapter? –  TomTom Apr 11 '11 at 13:22
    
Hi Using enlightment! There are five adapters in host, but only using one adapter as VM switch and it will work fine! if using another one from balance four adapters as VM switch, it will be like the issue i post? Is it the adpater issue? Even though i replace new PCI adpater,the issue still come out? I can not understand! –  e0594cn Apr 11 '11 at 13:41
    
Me neither. I wuold say somthing is really fishy on the adapter side, host side. DO you use teaming? Nice high end adapter (Intel)? What adapters, what driver versions? –  TomTom Apr 11 '11 at 14:07

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