Network Time Protocols (ntp) working group @ IETF 117

Friday, 28 July, 2023
12:00 - 13:30 PDT (19:00 - 20:30 UTC)
Continental 8-9

1. Administrative and Agenda Bashing (Chairs)

• Karen presents the Note well
• No agenda bashing
• Minutes taker: Dieter

2. NTP/TICTOC WG Document Status Review/Update (Chairs)

• Khronos and Registries update later in the session
• PTP Enterprise Profile. \
  We need an updated draft and a shepherd writeup.

3. Khronos Update

https://datatracker.ietf.org/doc/draft-ietf-ntp-chronos/

Neta presents slides: \
https://datatracker.ietf.org/meeting/117/materials/slides-117-ntp-khronos-update

Discussion:\
No questions nor comments

4. Last call results for Updating the NTP Registries

https://datatracker.ietf.org/doc/draft-ietf-ntp-update-registries/

Rich presents slides: \
https://datatracker.ietf.org/meeting/117/materials/slides-117-ntp-ntp-registries-ietf-lc-issues

Discussion:\
- Characters in text fields
- (Erik, Watson) gave a URL with definition of printable ASCII.
- (Rich) Field should be printable ASCII

• (Rich) Currently reserved for private use is 'X'. The draft proposes a leading '-'. Opinion of the WG?
  • (David) Slight preference for the leading 'X'
  • (Rich) Will change accordingly
• (Rich) Encourage the WG to read the last postings on the mailing list.

5. Future of Leap Seconds (update)

Dieter presents slides: \
https://datatracker.ietf.org/meeting/117/materials/slides-117-ntp-future-of-leap-seconds

6. NTPv5 Requirements

https://datatracker.ietf.org/doc/draft-ietf-ntp-ntpv5-requirements/

Slides: \
https://datatracker.ietf.org/meeting/117/materials/slides-117-ntp-ntpv5-requirements-draft-consensus-calls

Discussion

• Results for consensus call on leap smearing

  • (James) Consensus is clear that it should be included. I shall update the document. However the details how to include are not clear. Seems to be different approaches that have been discussed.
  • (David) Not too much details in the requirements draft. But in the specification draft.
  • (Karen) I would prefer not to put the details in the requirements draft. Also in order to get this draft done since Miroslav is looking for guidance on these two issues.
  • (Doug) suggests that a server not only announces that it is currently smearing a leap second, but also that it is configured to smear leap seconds as they occur.
  • (Karen) To clarify. Two scenarios. At some point of time I can do it versus a leap second takes place and now I smear.
  • (Doug) Not only I can do it but I'm currently configured to do it when a leap second happens. So people know that it is coming.
  • (Dieter) It is in addition to the leap second announcement. It is able to do that.
  • (Doug) Yes, like proposed in Miroslav's draft.
  • (Denis) Agree with Doug. It is important to know that a server is configured for smearing.
  • (Karen) For the purpose of Jame's draft. This is a NTPv5 specification discussion not a requirements discussion.

• Results for consensus call on supported modes

  • (David) we shall not voting but looking for consensus
    -(Karen) Yes, that was the intention
  • (Neta) can we also support broadcast mode
  • (Karen) we need to have contribution
  • (Erik) to Neta. Shall broadcast mode a MUST
  • (Neta) it should be a SHOULD
  • (David) Contradict. I would like to get rid of it. How likely is it to get a doc through the IESG with many modes especially broadcast
  • (Erik) If this is an update for current practice this might work also with security review
  • (Karen) James open questions resolved
  • (James) It does. Will a new version be ready for LC?
  • (Karen) Yes, its time to get this done
  • (James) Who will be a shepherd the document
  • (Neta) will shepherd the document

7. NTPv5 Protocol Specification

https://datatracker.ietf.org/doc/draft-ietf-ntp-ntpv5/

No update. Need results from consensus calls.

8. NTP over PTP

https://datatracker.ietf.org/doc/draft-ietf-ntp-over-ptp/

9. NTS for PTP

https://datatracker.ietf.org/doc/draft-langer-ntp-nts-for-ptp-05

10. Roughtime

https://datatracker.ietf.org/doc/draft-ietf-ntp-roughtime/
https://datatracker.ietf.org/doc/draft-ietf-ntp-roughtime-ecosystem/

Watson presented slides:\
https://datatracker.ietf.org/meeting/117/materials/slides-117-ntp-roughtime-update

Discussion:
- (James) Interest in Google and Automotive?
- (Watson) Google .... Automative I don't know.
- (James) I can help to contribute (editorial)
- (David) only had rough exploration of this draft. Solving the bootstrap problem is hard
- (Bob Beck) Probably interest in some bootstrapping environments. May helpful to have it on Github. Probable interested in helping.
- (Rich) CT for time is engineering task. Can help.
- (Erik) Don't have a elevator view of the difference in NTS and Roughtime.
- (Bob Beck) This is a was to not to have to trust a big guy.
- (James) May need a design group

11. AOB and Way Forward

• Hackathon for NTPV5 and Roughtime next IETF week (Prague)
• Two virtuell Interims: mid September, October
• Tooling for Hackathon: Meetecho vs. Zoom. Please indicate preferences

Adjourned 12:00