hello i want to start off and say i am new to esxi enviroment and built a white box at home to get some experience virtulazition. everything works flawlessly but the only problem is when i do network connections speed test between vm to physical machine i get good throughput. when i run a iperf test (comp A, iperf -s <------ iperf -c ip address comp B) between linux vm to linux vm i get 3 gbps even for linux vm to physical computer no matter OS its fine. the problem is windows VM to windows VM no matter what version of windows ( win 7 , win server 2008 or 2012) the iperf speed is 12 mbps and maximum 80 mbps however when i do a iperf test from physical OS to windows VM i get avg 670 mbps. when i do a iperf test with the option of -l 65535 i get great speed between windows os virtual or not. my settings is i have pfsense installed inside esxi on a e1000 card as the router. i have vcsa on e1000 card i have all windows on vmxnet3 card (better throughput)and all linux on e1000 card. all switches are on auto negotiate, all mtu are at 1500. all VM's have VMCI enabled. i have searched google for varies answers i have changed in a test windows 7 vm some network settings like disabling TSO disabling all to most offload tcp settings or ipv4 settings with no hope. if somebody can assist me in improving my network speed between windows vm to vm would be great or redirect me to a place where they might have the answer to my issue that i might have missed. thank you
