Replication of backups to another NetBackup domain is known as Auto Image Replicaton.

Use this guide to configure Auto Image Replication of backups to an OpenStorage device.

See About NetBackup Auto Image Replication.

NetBackup deduplication also supports Auto Image Replication.

See the NetBackup Deduplication Guide:

https://support.cohesity.com/s/article/article-100040135

Snapshot replication within the same domain.

Use this type to replicate snapshots from one OpenStorage device to the same device or to another device of the same vendor and type.

See the NetBackup Replication Director Solutions Guide:

https://support.cohesity.com/s/article/article-100040135