- Entry:
- MOD
- Event:
- MODIFY TOPO operator command
- Modules Generating Entry:
- ISTTROMT
This trace record is issued when the MODIFY TOPO command
with the FUNCTION=QUIESCE or FUNCTION=NORMAL operand is entered by
an operator. 
- Byte (hex)
- Contents
- 00–02
- Record ID: C"MOD"
- 03
- Action
- C"Q" FUNCTION=QUIESCE
- C"N" FUNCTION=NORMAL
- 04
- Status byte from the CV47
- 05
- Flags byte from the CV4680
- 06
- Flag byte
- Bit
- Meaning
- 111. ....
- TG type from TGREC
- B'000'
- Endpoint TG
- B'001'
- Intermediate routing TG
- B'010'
- Interchange TG
- B'011'
- Intersubnet TG
- B'100'
- Branch extender TG
- ...1 ....
- Garbage collection indicator from TGREC
- .... 1...
- Adjacent node's HPRTT value from TGREC
- .... .11.
- Local node's HPR/HPRTT values from TGREC
- 07
- Number of days left before TGREC is garbage collected
- 08
- Scope of the MODIFY TOPO command
- C"L" SCOPE =LOCAL
- C"N" SCOPE =NETWORK
- 09–17
- 0
- 18–1B
- Resource sequence number from CV47
- 1C–1F
- First word of timestamp for trace entry