Planning for MSC support with ETO

You can define MSC physical and logical links by using static system definition macros or you can create them dynamically by using type-2 CREATE commands.

You can identify a remote MSC NAME to IMS using an MSC descriptor. The descriptor relates each remote resource to the link path name of a generated MSNAME macro.

Recommendation: Define remote LTERMs with MSC descriptors to maintain consistency between remote and local systems.

If you choose not to use MSC descriptors in order, the MSC Verification utility (DFSUMSV0) recognizes the remote LTERMs but not the corresponding local LTERMs in the target system. In this case, IMS issues warning message DFS2331W.

IMS processes MSC descriptors that are associated with MSC links defined within the IMS. IMS ignores other MSC descriptors. You can maintain a single network definition for remote LTERMs in IMS.PROCLIB for multiple interconnected IMS systems that use MSC. In this case, each logical link path name must be unique throughout the entire network.