I wanted to give you a quick-read introduction of vCloud Hybrid cloud manager.

vCloud Air Hybrid Cloud Manager enables bidirectional VM mobility and migration to the cloud and back, and hybrid networking to extend on-premises vSphere vCenter networks into vCloud Air. Data transport features include network extension, WAN optimization, Multi-tenant WAN with Intelligent Routing, and path fail-over.

Security features include Suite B-compliant AES-GCM with IKEv2, data de-duplication and compression, AES-NI Offload, Flowbased Admission Control. It gets interesting because Hybrid Cloud Manager owns the source and destination encryption and decryption, ensuring a consistent security policy and providing admission for hybrid workflows like virtual machine migration and network extension.

These features can be deployed in several ways. Hybrid Networking (Layer 2 Extension) can securely extend your vSphere vCenter to integrate with a vCloud Air Virtual Data Center (vDC). We can also stretch multiple L2 segments  and can route stretched networks via Cloud Gateway for encryption and through the WAN optimization appliance to provide a secure and optimized path through the Internet to vCloud Air.

Read more at the official doc here.