Start the line trace with the MODIFY TRACE command or the TRACE start option. In either case, specify TYPE=LINE. For more information on the MODIFY TRACE command, see z/OS Communications Server: SNA Operation. For more information on the TRACE start option, see the z/OS Communications Server: SNA Resource Definition Reference.

Make sure that the GTF with the TRACE=USR option is active before starting this trace. See Starting the generalized trace facility (GTF).

To format and print line trace data for a 3705, 3720, 3725, or 3745, use ACF/TAP and specify INPUT=LINE.

For more information on printing trace output, see Formatting and printing trace records.