Architecting a vCloud Availability for vCloud Director Solution : vCloud Director Configuration : 5.4 Network Management
   
5.4 Network Management
During vSphere Replication configuration, the tenant selects one recovery network and one test Org VDC network for each Org VDC in the Target Networks Configuration dialog. All subsequently created replications will use the Recovery network setting. If the Recovery network is changed later, existing replications will not be affected. However, changing the Test network is applicable to all replications for the given Org VDC.
Figure 21. vSphere Replication Target Network Configuration
 
vCloud Availability for vCloud Director does not provide any mechanism for network extension from on-premises environments to the cloud. This can be achieved with Layer 2 or Layer 3 VPNs, direct connects, and similar technologies, but this is out of scope of this document.