In this architecture, vRealize Automation and vRealize Orchestrator run on a VXLAN-backed network that is fronted by the NSX Logical Distributed Router. An NSX Edge services gateway, acting as a load balancer, is deployed to provide load balancing services for the CMP components.

vRealize Automation Logical Architecture for Region A
Region A has a complete set of vRealize Automation components

vRealize Automation Logical Architecture for Region B 
vRealize Automation in Region B has a more limited set of components