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 25GbE / SFP28 NIC Performance

danielmgrinnell's profile image
danielmgrinnell posted Sep 25, 2024 12:08 PM

Hey all, 

I recently installed some new SFP28 / 25GbE HBA's in my ESXi Hosts and they are showing up as 25 Gbit/s which is Great. 

Now added the new NIC's as Uplinks to my VDS and moved them up to Active Uplinks in a test vdportgroup and have a few vm's on that portgroup and have been doing iPerf for performance testing. 

The VM's of course have VMXNET3 and are showing 10.0 Gbps, but i cant seem to get any higher speed then 2-3 Gbits/Sec. Show i expect the NIC to be showing 25Gbps ?  I created a new vm on the portgroup and added a new NIC and same results. 

Any ideas? 

Thanks