Hi,
I try to enable RSS on Windows 2012 R2 servers running VMXNET3.
The case is that I have 5 servers where I want to enable RSS on. All vm's are more or less the same spec. (+-vCPU, Memory). All of them have >=4 logical CPU.
I of course had issues with the very old vm drivers/tools running so I failed at the first attempt. After upgrading VM tools to 10.1.7 I managed to enable RSS on the first server. Success!
...but I failed on the next ones and can't force them to be capable of RSS. I went thru all the steps enabling TCP global settings + enabling on the NIC Advanced setting.
Finally I've installed the latest VM Tools 10.2.0 but it still did not help. In fact I managed to effectively enable it at one more server but as part of the troubleshooting I lost it.
What I did was: netsh int tcp set global RSS=Disable at the stage when it worked (state as above), but the netsh int tcp set global RSS=Enable didn't bring it back as I expected.
Currently all the servers are running 10.2.0 Tools with VMXNET driver 1.7.3.7 but only one has RSS Capable = True and IndirectionTable filled in when I run the PowerShell cmdlets.
Any advices on what should be checked more? Should VM tools 10.2.0 solve all the issues with VMXNET3 and RSS on Server 2012 R2?