- Entry:
- PKI or PKO
- VIT option:
- CIA
- Event:
- TCP/IP packet sent or received
- VIT processing module:
- ISTRACCI
- Control is returned to:
- ISTTCCXD, ISTTCCXB, ISTTCCWD, ISTTCCWB, ISTTCCLB, ISTTCCLD, ISTTCCCB, ISTTCCCD
This trace entry provides information about packets received by or sent from TCP/IP data link control (DLC).
A PKI trace record is written whenever the buffer control channel program completes with packets received.
A PKO trace record is written whenever a packet is transferred
to the telecommunications subsystem or communication adapter by inserting
it into the buffer control channel program. 
- Byte (hex)
- Contents
- 00–03
- Record ID:
- C"PKI" for inbound packet data
- C"PKO" for outbound packet data
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ID is greater than X'FF'.
- 05
- RESERVED
- 06–07
- Total length of the packet
- 08–0B
- TIPAC address
- 0C–1F
- First 20 bytes of packet data