Measuring the bi-directional bandwidth between VMware ESXi hosts in the VxFlex node Use Iperf to measure the maximum possible bandwidth between VMware ESXi hosts in the VxFlex node. About this task Iperf is a component of the VMware vSphere Virtual SAN Health Check Plugin. Procedure Type the following to disable the firewall on all VMware ESXi hosts. esxcli network firewall set --enabled false Type the following to create a copy of Iperf in the same directory in each host: cp usr/lib/vmware/vsan/bin/iperf3 /usr/lib/vmware/vsan/bin/iperfcopy Type the following to use the copy of Iperf as a server: ./iperf3 –s Hostname Type the following to use the copy of Iperf as a client on another server: ./iperf3 –c Hostname Type the following to test traffic in both directions: ./iperf –c Hostname -d Repeat these steps for each of the hosts. When you are finished, type the following to enable the firewall on all VMware ESXi hosts: esxcli network firewall set --enabled true Parent topic Monitoring the networkThere are two tools included with VxFlex OS, which you can use to monitor the network using the tests below.