To get the Port-ID of an affected VM
esxtop -> n (for network)
Search and copy the PORT-ID of the affected VM
exit from esxtop
Port-ID can be found also with following command
net-stats –l
Get VM statistitcs
esxcli network port stats get -p <PORT-ID of the affected VM>
Statistics of a vNIC rx/tx queue
vsish -e cat /net/portsets/<DvsPortset-#>/ports/<PORT-ID of the affected VM>/vmxnet3/rxSummary
vsish -e cat /net/portsets/<DvsPortset-#>/ports/<PORT-ID of the affected VM>/vmxnet3/txSummary
Sources and useful links
Using the pktcap-uw tool in ESXi 5.5 and later
Packet Capture on VMware ESXi using the pktcap-uw tool