Architecting a vCloud Availability for vCloud Director Solution : vCloud Availability Management Components : 4.3 Cloud Proxy : 4.3.4 vCloud API Load Balancing
   
4.3.4 vCloud API Load Balancing
Multiple internal management components (vSphere Replication Cloud Service, Portal, Usage Meter, VMware vRealize® Orchestrator™) require access to the vCloud API. If the public vCloud API endpoint is not routable from the internal management networks, a separate internal VIP can be configured on the VCD DMZ network. Split-brain DNS or local hosts entries can then be utilized to provide correct internal VIP resolution of the vCloud API FQDN.
Figure 9. Load Balancing Design Example