Linking Domains with External Systems

You can use external systems to make transports between domains.

External systems are like virtual systems. This means that they are accessed using a communications system. However, for this type of system, an separate transport directory is also defined. This directory can either be located on a disk partition that can be accessed by an SAP System in the other domain, or it is on a replaceable data medium.

To transport between two transport domains using an external system, proceed as follows:

1. In both transport domains, define an SAP System that exists as a real system in the other transport domain as an External System.
2. As the communications system, choose an SAP System that can access the intermediate directory or the drive of the exchangeable data medium.
3. Define the platform-specific path to this directory as the transport directory for the respective external system.

   You can now route transports to the external system. All necessary files are stored in the external transport directory.

   Using the queue display of the external system, you can check which transport requests have already been created there.

4. To transfer them to the other domain, you must adjust the import queue in the relevant target system (see Special Features when Using Multiple Transport Directories) once the transport data has been made accessible.
5. If you have chosen a target system in the source domain that does not exist in the target domain, you can still transfer the transport requests.

   To do this, define another external system in the target domain with the name of the original target system. From the queue display of this system, you can route the transport requests to the SAP System you have chosen.

Example Configuration of External Systems