Tuesday, February 04, 2014

Hyper-V 2012 R2–PXE boot from Synthetic NIC


Prior to Windows Server 2012 R2 Hyper-V there was a PXE issue that meant you needed to have a legacy NIC boot PXE then a synthetic NIC for speed, which the PVS would auto switch on boot. This is now gone.

This was the PVS v7+ setting:

By default, Provisioning Services automatically switches from legacy Hyper-V NICs to synthetic NICs if both exist in the same subnet. To enable the option to only use synthetic NICs if legacy Hyper-V NICs exist within the same subnet, edit the target device's registry settings:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\BNIStack\Parameters] "DisableHyperVLegacyNic"=dword:00000000


Windows Server 2012 R2 Hyper-V

Generation 2 Virtual Machines now have this support:

The synthetic NIC can boot from the network using PXE


Synthetic network adapters support PXE boot. Gone is the old legacy network adapter.

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