Hi!
I have 4 host cluster. Each host with two Mallanox ConnectX-3, IPoIB, vSphere shows 40Gbps for each port.
How to chesk (test) real port performance, real max troughput?
You can use netperf The Netperf Homepage
This whitepaper is also using netperf to test the performance: https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/techpaper/vmware-vsphere-vxlan-perf-white-paper.pdf