SRV-IOV feature in the hardware acceleration

Question

Hi guys

I have a Dell R740 server, on this server I have two Broadcom NetXtreme E-Series Advanced Dual-port 10GBASE-T Ethernet Network Daughter Card NICs, these NICs support SRV-IOV.

The SRV-IOV feature has been enabled in the server BIOS, the feature for network cards has also been enabled in the BIOS.

I installed Windows Server 2019 on the Server, with the Hyper-V role When I'm going to create a new virtual switch I checked the option for SRV-IOV, and when starting the VM everything is ok.

The problem happens when I enable the SRV-IOV feature in the hardware acceleration options of the network card, at this point the network card stops responding, when I disable the feature the card returns to responding. I contacted Dell who replaced the card, but the problem still occurs.

Does anyone know what this problem might be?

Answer 1

Hello Daniel L,

It might seem that either the NIC or the Guest VM does not support SR-IOV. Please check the compatibility of Guest OS:

https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/hyper-v-feature-compatibility-by-generation-and-guest

and also the NIC compatibility with the PS cmdlet: Get-NetAdapterSriov <interface alias> | fl *

*you can find the <interface alias> with Get-NetAdapter cmdlt: https://learn.microsoft.com/en-us/powershell/module/netadapter/get-netadapter?view=windowsserver2019-ps

Hope it helps in your case!

Best regards,