I honestly haven’t tried the blade units, but I JUST remembered that in our testing (on rack units), if the nics are cabled and have link, the issue should also not appear. 
We are trying to install Windows Server 2008 R2 on a brand new Dell R710 server with the following changes in the default hardware configuration: - RAID 1 configuration between 2x 300GB SAS discs using the on-board RAID controller - The addition of 4x Intel Gigabit ET Quad Port Server Adapter PCIe x4 When we run the installer from the DVD or over the network using the virtual console, the installation gets to the final step, "Completing installation", but this step never completes. The server remains in this state indefinitely. If we try to install the operating system by using the Dell Systems Build and Update Utility (version 6.5.0), the installation begins and we are asked to insert the Windows Server 2008 R2 DVD. After inserting the DVD we are presented with the language setup and welcome screen, but after providing the information and clicking Install Windows, the installation gets stuck at the "Setup is starting screen". There is no disc or hard drive activity in either situation, and we have tried this with both UEFI and BIOS. The firmware on the box is the latest available. We were able to get VMware ESXi to install on the box with no trouble, but we are wanting to use this box for some Hyper-V testing. Has anyone ever had a problem like this before and if so, how did you solve it? Any ideas would be appreciated.
Windows Server 2008 R2 stuck during installation - Dell R710