Facing one weird issue on the Intel setup (We have 2 machines having Intel card -both side we have Intel xl710 having 40G speed).We are seeing just 1 Gbps of throughput with netperf,iperf etc using ESXi 6.5
Setup has ESXi 6.5 (latest VMware Tools install with adapter VMXNET3) on both DUT/Partner each having a VM on which we ran Netperf/iPerf.
We have updated latest driver and firmware on Intel.
Additionally we have tried throughput in loopback mode with both Intel interfaces on same machine connected (below) just to make sure that its an Intel adapter issue on a particular machine but it doesn't seem to be the case
VM1---vSwitch1--Intel-1
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VM2---vSwitch2--Intel-1
Intel Driver used: i40e-2.0.6-2494585-5301661
esxcli software vib install -d /tmp/i40e-2.0.6-2494585-offline_bundle-5301661.zip
FW: 5.04
Driver and FW are compatible as per the compatibility list @ VMware Compatibility Guide - I/O Device Search