Starting GTF to trace VTAM remote network activity

GTF can trace VTAM® activity only if VTAM is started with the GTF option. See z/OS V2R1.0 Communications Server: SNA Operation for details. In Figure 1, GTF options are not stored in parmlib; the the trace options are entered at the console. Three GTF options are required to record all VTAM traces:

RNIO must be specified so that the VTAM I/O trace can function for an NCP or a remote device attached to the NCP.
IO or IOP must be specified so that the VTAM I/O trace can function for a local device.
USR or USRP must be specified so that the VTAM buffer and the NCP line traces can function.

You must enter the START GTF command before a trace can be activated from VTAM.

Figure 1. Example: Starting GTF to trace VTAM remote network activity

START MYPROC.EXAMPLE8,,,(MODE=EXT)
 
00 AHL100A SPECIFY TRACE OPTIONS
 
REPLY 00,TRACE=RNIO,IO,USRP
 
AHL103I TRACE OPTIONS SELECTED--IO,USRP,RNIO
 
01 AHL125A RESPECIFY TRACE OPTIONS OR REPLY U
 
REPLY 01,USR=(FF0,FF1),END
 
AHL031I GTF INITIALIZATION COMPLETE