Troubleshooting APPN and HPR

If you have a communication problem related to APPN or HPR, review the following topics to help troubleshooting.

Solving remote communication problems using STRPASTHR
When you encounter communication problems indicating that the route to the remote location cannot be found, you can attempt to make the connection again using the Start Pass-Through (STRPASTHR) command.
Solving communication problems using DSPAPPNINF
Isolating a routing problem in an Advanced Peer-to-Peer Networking (APPN) network can be challenging. To view the APPN information to assist you in understanding the topology of network nodes and some of their locations, use the Display APPN Information (DSPAPPNINF) command.
Solving communication problems using WRKAPPNSTS
The Work with APPN Status (WRKAPPNSTS) command provides session-related information for advanced program-to-program communications (APPC) controller descriptions running Advanced Peer-to-Peer Networking (APPN) or high-performance routing (HPR).
Solving communications problems using communications trace
Communications trace can capture HPR data running over IP networks for analysis. You can use communications trace to troubleshoot Enterprise Extender communications problems.
Solving communication problems using session activity
Session activity, or actual work that occurs between the local system and adjacent systems provides you with the information about network attributes, mode, class of service (COS), and topology information.
Systems Network Architecture sense codes
Systems Network Architecture (SNA) sense codes contain additional information for system programmers and system support personnel about the error or problem that has occurred on the network.
APPN error log data
APPN error log data defines the setup data of an APPN session that is supplied when an error log is issued for a start pass-through failure. A start pass-through failure results in message CPF8933 (Route to specified location not found) being issued to the user's workstation. Use the following information for error log entries with reference codes 7100 and 7101.

Parent topic: APPC, APPN, and HPR