The VMware NSX-T Data Center physical edge cluster consists of an even number of physical servers to host edge VMs.

During initial deployment, the two VMware NSX-T Data Center logical edge clusters are built on the first two or four physical edge hosts in the cluster. Create host affinity rules in vSphere to ensure that this configuration is maintained in all situations except a component failure.

The following figure illustrates how the VMs are configured: 

If the initial deployment includes more than four physical edge hosts, only the first four hosts are populated with edge VMs. Use the rest of the hosts as needed.