Home > Storage > Unity XT > Data Protection > Dell Unity: Replication Technologies > Interoperability
Native Synchronous and Asynchronous Replication is supported between Dell UnityOS versions 4.0 and later systems in either direction. If there is a specific feature related to Dell UnityOS version 4.1 or later that is in use in the source system, then the replication session may not be supported and may fail to setup. In some cases, the replication session may succeed, and ignore the newer capability on the target system.
For File Replication, some features that should be considered when configuring replication include Common Event Enabler (CEE), IP Multi-Tenancy, Advanced Static Routing (ASR), Packet Reflect, and Folder Rename and Locking policies. The Advanced Static Routing (ASR) and Packet Reflect features will not prevent replication to Dell UnityOS version 4.0, but the settings for ASR and Packet Reflect will not be replicated. Similarly, if remote replication is already configured for a NAS Server and the destination system is running a previous version of Dell UnityOS, and the source system is upgraded to the latest Dell UnityOS, new features in the NAS Server cannot be enabled on the source system. To enable new features in the NAS Server on the source system, also upgrade the destination system to the latest version of Dell UnityOS. If replication between Dell Unity systems is critical, consider upgrading all systems participating in the replication to the latest Dell UnityOS version.
For more information about NAS Capabilities in the Dell Unity systems, please review the white paper titled Dell Unity: NAS Capabilities on Dell Technologies Info Hub.