Defining the physical link

You can use either the CREATE MSPLINK type-2 command or the MSPLINK stage-1 system definition macro to define the physical link and its attributes.

To use the CREATE MSPLINK command, dynamic resource definition must be enabled in your IMS system. The CREATE MSPLINK command is logged.

If dynamic definition is not enabled in your IMS system, you must use the MSPLINK macro to define your physical links. During system definition, define all physical connections that might potentially be used, even if several might be for backup purposes or might not be intended for continual use.

You must declare the physical link for partner systems in both system definitions. Using the TYPE keyword, declare the kind of physical link to use.

Assign a name to the physical link. The name of the physical link is used for logical link definition to match a connection between systems with the physical device or transmission technique that is to be used. The name is also used to identify the link when issuing commands.

If part of a conversation is to be passed from one system to another, use the maximum scratchpad area (SPA) size, if that SPA size exceeds the message segment size.

You can change the attributes of existing physical links by using the type-2 UPDATE MSPLINK command. Unless you save the physical link to the IMSRSC repository, the changes remain in effect only until the next cold start of the IMS system.