Here are the requirements directly from the most recent version of Dell Storage Manager Administrators Guide:
To create Live Volumes, the requirements listed in the following table must be met.
Storage Center version - The primary and secondary Storage Centers must meet the minimum version requirements.
NOTE: Dell recommends that both Storage Centers are running the same version of Storage Center.
Storage Center license - The primary and secondary Storage Centers must be licensed for Live Volume.
Storage Manager configuration - The primary and secondary Storage Centers must be added to Storage Manager.
Storage Center communication - The primary and secondary Storage Centers must be connected using Fibre Channel or iSCSI, and each Storage Center must be defined on the other Storage Center.
QoS definitions - Quality of service (QoS) definitions must be defined on the primary and secondary Storage Centers.
You can also reference the guides on or webpage:
Storage Center Series (Compellent) Technical Documents
Specifically there is a guide on Dell SC Series Storage: Synchronous Replication and Live Volume