Subject: [Ntp] Minutes from NTP Interim Meeting 2018-10-18

From: "Dieter Sibold" <[email-masked]>
Date: Mon, 12 Nov 2018 22:09:48 +0100

Dear all,

please find below the minutes from the last NTP interim meeting. Sorry 
for the long delay.

URL: 
https://datatracker.ietf.org/doc/minutes-interim-2018-ntp-02-201810181600/

- Dieter

———————————————————————————————————————
# NTP Virtual Interim Meeting

Time: Oct 18, 2018 4:00 PM UTC

Participants: Karen O'Donoghue, Denis Reilly, Kristof Teichel, Rich 
Salz, Marcus Dansarie, Richard Welty, Tal Mizrahi, Steve S, J. I. 
Alvarez-Hamelin, Sam Weiler, Miroslav Lichvar, Danny Mayer, Martin 
Langer, Erich Pleny

Administrative and Agenda Bashing
=================================

- Karen presents the Note Well
- No agenda bashing
- Meeting will be recorded. No objections.

TICTOC quick document status
============================

- Draft YANG Data Model for IEEE 1588-2008 has been through IETF LC.
	- The document triggered concerns at the IESG because it relies on 
other standard
	  body's documents which are not accessible openly.
	- A second IETF LC will be issued. Reviewers will get access to the 
IEEE 1588:2008
	  document for the purpose of performing a review.

- The Enterprise Profile for the PTP will proceed soon. As with the YANG 
data document
   it requires access to the IEEE 1588 document for the purpose of 
review.

NTP quick document status (Karen)
=================================

- MAC for NTP
	- Minor changes requested by the INT Area director
	- Is currently in the IETF LC

- Control Messages is ready for submission to the IESG

Guidelines for Defining Packet Timestamps (Tal)
===============================================
https://datatracker.ietf.org/doc/html/draft-ietf-ntp-packet-timestamps

Tal:
- At IETF meeting 102 an issue about timestamp formats that addresses 
leap seconds was
   raised and afterwords discussed in the mailing list.
- The authors believe that this is a very interesting topic but that it 
is not in
   the scope of this document. The draft is as it is well scoped and has 
two well
   defined goals:
	1. Recommend timestamp formats
	2. Guidelines for defining packet timestamps
- Open issue: how to address leap seconds a new timestamp format that 
deals with leap
   seconds (and leap second smears). This should be a new draft. Tal is 
willing to work
   on such a document together with anybody who is willing to volunteer.
- Tal believes the draft is ready for WGLC
Karen:
- This document will go to WGLC
- Anybody willing to work on a new timestamp format shall contact Tal.

Next steps for Network Time Protocol Best Current Practices
===========================================================
https://datatracker.ietf.org/doc/html/draft-ietf-ntp-bcp
- Karen: this document is currently on IETF last call
- Denis gives a report about the IETF LC comments
	- Working to the comments together with Dieter, Harlan and Karen. They 
are not
	  really controversial and the draft will be changed accordingly
	- Comments are tracked in a file accessible in the GitHub repository. 
Denis will
	  provide the address.
	- Few comments addresses the requirement language. This will be worked 
out with Karen.
	- BCP 38.
		- Question is should the document mention BCP 38?
		- Danny and Denis: yes
		- Denis will ask the list who is applying BCP 38
	- Leap smearing.
		- Some reviewer emphasize that leap smearing should not be used at 
all.
		  The authors believe that the draft should point out that leap 
smearing
		  currently is applied at some places.
		- The authors emphasize that it should only be applied within well 
controlled
		  networks.
		- The language shall be elaborated in order to make clear where leap 
smearing
		  can be applied. A MUST NOT is to strong.
      - Danny: leap smearing is quite controversial. A server has to 
signal if he is
        doing smearing.
	 - Denis: currently there is no standardized way to advertise that 
smearing is
	   applied.
	 - Danny: Up to now there are only some draft about the signaling
	 - Rich: is the recommendation: don't smear on the public internet 
without indicating
	   that it is being done. Recommend to say nothing about the private 
enterprise
	 - Denis: the language says that smearing can be used within a local 
environment
	 - Rich: that is fine
	 - Denis: the document should acknowledge that smearing happens
	 - Denis: all comments shall be answered on the mailing list and GitHub 
by next Friday

- Document's intended status
   - Karen: didn't pay must intention when doing the shepherd of how 
this going to be
     informational or a BCP. It should be a BCP and the audience should 
be specified
     clearly. In particular that it addresses operators.
- Next steps for the draft
	- Karen: update the draft and hopefully get consensus from the IESG 
that we had
	  addressed all comments from the IETF LC. It then goes to IESG ballot 
and get
       published, hopefully.
- Karen will speak to an operator about BCP 38
- Karen the author have to update the documents by the end of next week.

NTS for NTP
===========
- Karen: there has no interoperability testing after the last interim
- Status of the draft (Dieter)
	- Version -13 still is  current. No update since the last interim 
meeting.
   - two editorial updates on the Github version
   - Daniel couldn't provide the updates he intends to do on the record 
formats
- Marcus: Neta send a comments regarding the NTS draft
- Kristof: I've answered to this comment
- Karen: an update of the draft prior to Monday would be great

Planning for NTS interoperability testing
=========================================
- Karen: NTS efforts during the last two hackathon. Both have been very 
productive.
- Karen: didn't plan to have NTS at the next hackathon in Bangkok.
- Karen: would like to have an interoperability test in Prag. If the 
documents goes
   to WGLC by the end of this year we will have more real implementation 
by March.
- Martin: intends to update his implementation to address version -13. 
Suppose to
   have a finished implementation of the current draft by March.
- Richard: is testing with the ntpd based implementation against 
Martin's implementations

Yang NTP
========
- Karen: the document went through a YANG doctor review and was updated 
afterwards.
- Karen will contact the authors to double check if the document is 
ready for WGLC.
- No comments

REFIDs
======
- Karen:  The leap smear refid was removed from the draft 
"draf-ietf-ntp-refid-updates".
   It is no submitted as individual submission in the draft
   "draf-stenn-ntp-leap-smear-refid".
- Aanchal mentioned that she didn't spoke with Harlan about these 
documents
- Karen: ask Aanchal to review the review the current version of draft
   "draf-ietf-ntp-refid-updates"
- Karen: WGLC decision in Bangkok

NTP Data Minimization
=====================
- Karen: This was on WGLC and it was very quiet
- Karen: are there any comments about the next steps for this document
- Rich: it is ok if there is no consensus about a draft
- Marcus: support way forward
- Karen: will go to the IESG

NTP Correction Field
====================
- Miroslav: New version has been submitted. It contains two changes.
	- The EF format is no complaint to PTP's correction field (timestamps 
in ns)
	- Fields for root delay and root dispersion are removed
- Karen: do you think there is consensus for a call of adoption. The 
status of the draft
   is experimentell.
- Miroslav: would like to hear Tal's opinion.
- Karen: if Tal and you are pleased with the document please ask (Karen 
and Dieter)
   for a call for adoption

NTP short extension field
=========================
- Miroslav: Motivation to have a short EF for root dispersion and root 
delay.
   May be used for other purposes.
- Miroslav specify a new packet format in accordance with 7822. 
Important, there is
   no ambiguity in parsing of the EF. It should therefore don't break 
implementations
   which implemented RFC 7822.
- Miroslav: would like to know if other people find this interesting.
- Karen: any feedback on this draft
- Miroslav: to make clear, this is a alternative approach to Harlan 
proposal
- Danny: it is an update to 7822. Harlan's draft also would be an update 
to 7822,
   although it makes other things as well.
- Karen: Correct, Harlan EF proposal was not approved for adoption.
- Karen: we should see this draft as an update of 7822.
- Karen: Action for this document is to be discussed on the mailing list

Harlan's individual submissions
===============================
- draft-stenn-ntp-extension-field: Update -07. There is no consensus on.
   Any comment to this document. No.
- draft-stenn-extended-information-EF: Any comments: OK
- I-Do draft: No comments.
- Karen: ask anyone to read these documents and post comments on the 
list.
- Karen: Dieter and I have to reach out Harlan to clarify how to 
proceed.

AOB
===
- Karen: ask peopled to drop a note who is attending the meeting
- Interoperation event at IETF 104 planned.
- An virtual interoperability even in January would possibly nice for 
preparation
   of IETF 104. Anybody interested to participate and help, please 
contact Dieter
   and Karen
- Upcoming meeting:
	- IETF 103 in early November
	- Interim in mid December
	- Interim in late January