Network controller line trace operation

Start the network controller line trace with the MODIFY TRACE command. For more information on the MODIFY TRACE command for the network controller line trace, see z/OS Communications Server: SNA Operation.

Active traces stop if:

The network controller is reset (for example, during a failure or a configuration load).
The network controller enters slowdown (shown in the header of the RECTRD RU).
The line fails during the trace.

If the network controller recovers after a failure, and it is not the only one on the line, the trace will resume.

Make sure that the GTF is active before starting this trace. See Starting the generalized trace facility (GTF).

Use ACF/TAP with NETCTLR specified to format and print the output. For more information on printing trace output, see Formatting and printing trace records.