gtpi1m3n | System Installation Support Reference |
The logical unit (LU) registration user exit, UARG, allows you to select
the local LUs that the TPF system registers with the APPN network. A
local LU is any LU that resides in any processor in the loosely coupled
complex.
The TPF system starts the registration process when CP-CP sessions become
active. UARG is called, for each local LU, during the registration
process.
Input
- R2
- RVT1 address of the TPF LU to be registered.
Programming Considerations
- IBM provides sample code for UARG, which sets the return code to 0
indicating that the LU should be registered.
- If all TPF local LUs have been predefined to the APPN network, you do not
need to register them. Code UARG to set return code 2 in this
case.
- A TPF local LU must be defined to the APPN network for a remote LU to
establish a session with that TPF LU. The TPF local LU must either be
predefined or registered.
- Data level D0 must not be modified. All other data levels are
available for use by this user exit.
- EBW000-EBW103 and CE1UR1-CE1UR6 must not be modified.
EBX000-EBX103 is available for use by this user exit.
Return Values
R7 contains the return code:
- 0
- Register this LU
- 1
- Do not register this LU, but continue the LU registration process
- 2
- Do not register this LU and end the LU registration process.