The processor sets overlap when LBFO is configured with sum-queue mode.

This event started just after I created the HyperV virtual switch.

 

The processor sets overlap when LBFO is configured with sum-queue mode.

The processor sets overlap when LBFO is configured with sum-queue mode.

 

As I couldn’t find much information on this event  on Blogs/Forums, I opened up a case with Microsoft for a quicker resolution. And the resolution which I got is to configure the HyperV Data Interfaces to use exclusive set of processors with respect to RSS configuration.

Set-NetAdapterRss -name vm-nic-1 -BaseProcessorNumber 4 -MaxProcessorNumber 7

Set-NetAdapterRss -name vm-nic-2 -BaseProcessorNumber 8 -MaxProcessorNumber 12

This event stopped after the next reboot, However, I got a new event – Event ID 49 – HP FlexFabric 10Gb 2-port 554FLB Adapter #5 : RSS is limited to 4 queues. Enable Advanced Mode in the PXE BIOS to use up to 16 queues. This may require a firmware update. I will write about this in my next post.

To my understanding, You can allocate a subset of logical processors to each HyperV Data interface. I am trying to understand more details on this. Based on a recent Technet Blog, VMQ will get enabled by default while we create a vSwitch. Once VMQ is enabled, RSS will be disabled on those interfaces. I will update this post once I get more details. If you can get this clarified, Please comment 😀 .

 

Update – Microsoft has published a KB article on this recently. Have a look on that too.

 

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