gtps2m40 | ACF/SNA Data Communications Reference |
Use the ZNTRP command to start the PIU trace facility and specify which data to trace. The TPF system stores the data being traced in entries in the PIU trace table. The data stored in a PIU trace table entry can be a PIU in FID2 or FID4 format, an NLP, or an 8-byte CTC header (which is included in all read and write channel programs during normal CTC data transfer operations).
You can use the PIU trace facility to trace the following:
You can start more than one trace at the same time; for example, you can trace the data for LU X and LU Y. Depending on how you define your traces, some traces may overlap other traces. For example, if you start tracing the data for LU X and then later start tracing the RTP connection being used by LU X, the trace defined for the RTP connection will overlap the trace defined for LU X. In addition, if you have traces defined for specific resources and then later start tracing all resources, the trace defined for all resources will overlap the traces defined for specific resources.
At any time, you can display information about the status of the PIU trace facility and the data being traced. See Displaying Information about the PIU Trace Facility for more information.
To start the PIU trace facility, do the following: