Virtual Server 2008 R2 on Windows 2008 R2 Not Detecting Physical Network Card (NIC)
Posted by Russell Wright on June 17, 2010
I’ve got a Windows 2008 R2 server that I’m running Virtual Server 2008 R2 on and, after a hard drive upgrade this past weekend, all my physical to virtual network connections were lost (broken). Looking at my "external network" defined in Virtual Server, I found that the physical network adapter was set to "None (Guests Only)."
Taking the advice of Ben Armstrong, Virtual PC Guy, I uninstalled the Virtual Machine Network Services on my physical server’s NIC, rebooted and then reinstalled the Virtual Machine Network Services. I was saddened when I looked and saw that the physical NICs were still not showing up in the drop down list.
However, I had one last trick to try before another reboot. I opened the services applet and stopped/restarted the Virtual Server and Virtual Machine Helper services.
Then I went back to look at my list of physical NICs. They were all there! Networking is now back to normal.
Had this happen again so I simply stopped and restarted VS from services.msc. The state of my running VMs was saved and the network returned without removing and re-adding the Virtual Machine Network Services. Networking was restored. Now, if I can only determine why this is happening.