Configure the Virtual Machine Communication Interface in the vSphere Web Client
The Virtual Machine Communication Interface (VMCI) provides a high-speed communication channel between a virtual machine and the ESXi host that it runs on. You can also enable VMCI for communication between virtual machines that run on the same host.
Verify that the virtual machine is using hardware version 7 or later.
1. Select a virtual machine.
2. In the VM Hardware panel, click Edit Settings.
3. Click Virtual Hardware.
4. Select Enable VMCI between VMs.
5. Click OK.