With all VR releases so far, for vCenter to vCenter replications, VRMS version must match at source and target site (only this configuration is officially tested and supported), for example:
1.0.x <-> 1.0.x.
5.1.x <-> 5.1.x.
5.5.x <-> 5.5.x.
5.6.x <-> 5.6.x.
5.8.x <-> 5.8.x.
6.0.x <-> 6.0.x.
6.1.x <-> 6.1.x.
For vCenter to vCloud Air DRaaS replication, there is no such restriction.
For both vCenter to vCenter and vCenter to vCloud Air DRaaS, based on source ESXi version and target VR server version different replication capabilities are supported.
Thank you Martin,
I looked at the Interoperability Matrix and saw that the vCenter 6 and 5.5 has no VR that support both.
Is it true that there is no upgrade path from vCenter 5.5 to vCenter 6 and the DR site with 5.5 while have the VR still operate between the primary and the DR?
Can you show me where you got the reference that vSphere replication Target and Source have to be the same?