You can perform migration with a minimal configuration. Other than the Hybrid Cloud Manager, only the Hybrid Cloud Gateway appliance is required.

In Table 2, cases 1 and 2 are for migrating without a Layer 2 extension. The basic difference between cases 1 and 2 is that greater speed is possible with the Hybrid Cloud Manager Advanced option.

The minimum requirement for low-downtime migration is vCenter 5.5 Update 3, or vCenter 6.0 or greater. Your vSphere host must be eSXi 5.5 or higher. It is possible to migrate virtual machines without network extension. In this case, the virtual machine obtains a new IP address using the Guest Customization service after it is migrated. If you choose to stretch a network, you must have a distributed virtual switch in your vSphere vCenter.

WAN Optimization can improve speed in the situations described in WAN Optimization. Configuring the Hybrid Cloud Gateway to use a high-speed line (such as a Direct Connect) improves speed by providing a higher bandwidth link for WAN optimized traffic.

Migrating virtual machines on extended networks into vCloud Air is advantageous because it reduces downtime and the configuration does not change on the virtual machine. The virtual machine can retain the IP addresses, MAC addresses, computer names, and virtual machine names. Retaining these properties greatly simplifies the migration to vCloud Air and enables easy return trips to the on-premises data center. The Network Extension feature requires a vSphere Distributed Switch, which is available with vSphere Enterprise Plus Edition.

Minimum Software Requirements for Cross-Cloud vMotion

vSphere vCenter

Transport

vCloud Air Dedicated Cloud, vDC

vCenter 5.5 Update 3 or greater

250 Mbps or greater

Hybrid Cloud Manager Advanced

HT L2C recommended

Hybrid Cloud Manager Enterprise

Distributed Virtual Switch

Advanced Networking Services: Standard or Premium

eSXi 5.5 or greater