To add virtual machines to universal logical switches, the following prerequisites must be satisfied:

• User with NSX Enterprise Administrator or NSX Administrator role
• NSX Managers in both vCenter domains must be deployed and configured for Cross-vCenter NSX
• Controller cluster in the primary site is deployed and accessible
• Unicast control plane replication will be used
• ESXi hosts in either site can communicate with one another from their VTEP interfaces and the 1600-byte MTU has been set on the physical infrastructure
• Universal Transport Zone and corresponding segment ID is configured and available
• Universal Logical Switches from the earlier recipe have been created
• Universal Distributed Logical router from the earlier recipe has been created