In this scenario, the vCenter Servers and Witness virtual appliances are deployed at the same management cluster located at a main data center. One vCenter Server instance can manage multiple VxRail vSAN 2-node clusters but each VxRail vSAN 2-node cluster must have its own Witness. 

Network bandwidth must meet the requirements stated earlier. Enhanced link mode is recommended.

Figure 8.              Centralized management of vCenter Server and Witness appliances