Esxi measures network bandwidth iperf: Processor: 2 x Intel Xeon E5-2687W v4 (48 Cores), Motherboard: Intel 440BX (VMW201.00V.24224532.B64.2408191502 BIOS), Chipset: Intel 440BX/ZX/DX, Memory: 256GB, Disk: 275GB Virtual disk, Graphics: VMware SVGA II, Network: VMware VMXNET3 OS: Ubuntu 20.04, Kernel: 5.4.0-200-generic (x86_64), Vulkan: 1.1.182, Compiler: GCC 9.4.0, File-System: ext4, Screen Resolution: 1672x1254, System Layer: VMware iPerf 3.14 Server Address: localhost - Server Port: 5201 - Duration: 60 Seconds - Test: UDP - 100Mbit Objective - Parallel: 10 Mbits/sec > Higher Is Better iperf . 1000 |================================================================= iPerf 3.14 Server Address: localhost - Server Port: 5201 - Duration: 60 Seconds - Test: TCP - Parallel: 10 Mbits/sec > Higher Is Better iperf . 22902 |================================================================ iPerf 3.14 Server Address: localhost - Server Port: 5201 - Duration: 60 Seconds - Test: UDP - Parallel: 10 Mbits/sec > Higher Is Better iperf . 10.5 |================================================================= iPerf 3.14 Server Address: localhost - Server Port: 5201 - Duration: 60 Seconds - Test: UDP - 10000Mbit Objective - Parallel: 10 Mbits/sec > Higher Is Better iperf . 20048 |================================================================ iPerf 3.14 Server Address: localhost - Server Port: 5201 - Duration: 60 Seconds - Test: UDP - 1000Mbit Objective - Parallel: 10 Mbits/sec > Higher Is Better iperf . 9999 |=================================================================