gtps2m2n | ACF/SNA Data Communications Reference |
When CP-CP sessions are activated between an APPN end node (EN) and network node (NN), the EN is expected to register all of its resources (LUs) with the APPN network if the resources have not been predefined. Being an EN, the TPF system will register all its LUs after the CP-CP sessions are activated.
The LU registration user exit, UARG, allows you to control which LUs, if any, will be registered with the APPN network. If you have not predefined the TPF LUs to the APPN network, use the default logic for UARG, which will register all of the TPF LUs. See TPF System Installation Support Reference for more information about the UARG user exit.
Predefining LUs eliminates the overhead of having to do LU registration whenever CP-CP sessions are activated; however, the LU registration process is more dynamic and makes adding new LUs much easier. Moving an application (LU) from one node to another node is also much easier when LU registration is used as opposed to predefining LUs and their owner.