gtpi1m4j | System Installation Support Reference |
The select adjacent link station (ALS) to adjacent Advanced Peer-to-Peer Networking (APPN) node user exit, UALS, allows you to select which ALS the TPF system will use to start a session with an LU 6.2 resource that resides in an adjacent APPN node.
UALS is called when the TPF system starts an LU 6.2 session and the local LU is the primary LU (PLU) and the remote LU is known to reside in an APPN node adjacent to the TPF system. Because the remote LU resides in an adjacent node, there is no need to send a LOCATE search on the CP-CP sessions. Instead, a BIND request can be sent directly to the adjacent APPN node. UALS selects the ALS over which to send the BIND request.
Input
Programming Considerations
See TPF ACF/SNA Data Communications Reference for more information about how the TPF system selects the path to use when starting a new LU-LU session.
Return Values
R1 contains the return code: