Forum Discussion
VMXnet3 Server 2025 performance issues
Had an odd one crop up today. I updated my Server 2025 template to the 26063.1 release and then sysprepped it. Converted it back to a new VM and network performance was .25 Mbps down. Both on my l...
Hi Jeff,
which NIC exactly (manufacturer type) does your ESXi use as an uplink interface for the corresponding vSwitch?
My crystal ball tells me that maybe VMQ is activated on the VMXnet3 vNIC, but that this is not configured correctly in terms of hardware.
You can try VMXnet3 without VMQ, which should run much better and would also confirm my suspicions.
But, without VMQ or SR-IOV, you can't really utilize a 10G or even faster vNIC.
As mentioned, you should also deactivate both RSC in the VM and its counterpart, i.e. TSO in the ESXi.
Best Regards from Germany
Alex