About the domain relationship for replication
For third-party vendor appliance storage that is exposed through the OpenStorage API, the disk appliance manages the storage. The relationship between the originating domain and the target domain or domains is established by using the storage vendor's tools.
The originating NetBackup domain has no knowledge of the storage server in the target domain or domains. When the appliances are configured properly, NetBackup images on the originating disk appliance are replicated automatically to the target disk appliance. That disk appliance uses the OpenStorage API to notify NetBackup that a replication event occurred. NetBackup then imports those images.
NetBackup manages the lifecycle of the backup images but does not manage the storage.
Configuring the disk appliance replication relationship is beyond the scope of the NetBackup documentation.
Caution:
Choose the target storage server carefully. A target storage server must not also be a storage server for the originating domain.