Unidentified network issue with virtio NIC cards in Windows 2008 R2 VM on RHEV - Red Hat Customer Portal

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Issue

All the windows 2008 R2 VM has an issue with the VirtIO Network card driver.
Whenever we restart the vm the network card had a yellow sign after the server reboot.
Which meant that windows did not identify the network interface or there was no driver for it.
So we go to the network manager in windows and disable and enable network card, then it works again.

Environment

Red Hat Enterprise Virtualization 3.0
Windows 2008 R2 VM
Virtio NIC

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