Hyper-V Installation Network Settings Reset

Cause

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This issue occurred because of the SR-IOV feature enabled in the server's BIOS.

With certain HP hardware/drivers, this causes re-enumeration of the PCI devices when Hyper-V Role is installed.

Solution

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To resolve the issue, the following steps can be performed:

A. Disable SR-IOV from HP's BIOS:

To disable SR-IOV in the UEFI ROM, complete the following steps:

1. During system boot, press F9 to run the System Utility.

2. Select System Configuration, and then press Enter.

3. Select BIOS/Platform Configuration (RBSU), and then press Enter.

4. Select Advanced Options, and then press Enter.

5. Select Advanced System ROM Options, and then press Enter.

6. Select SR-IOV, and then press Enter.

7. Select Disable, and then press Enter.

8. Press F10 to save.

B. Configure the NIC teaming and all other relevant configuration as required.

C. Install Hyper-V role and reboot.

Following information which might be relate:
DL 380 Gen8 with Windows Server 2012 R2 Hyper-V Role NICS change
http://h30499.www3.hp.com/t5/ProLiant-Servers-ML-DL-SL/DL-380-Gen8-with-Windows-Server-2012-R2-Hyper-V-Role-NICS-change/td-p/6656826#.VYAoyeQw-Uk