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Re: [Ntp] Opsdir last call review of draft-ietf-ntp-mode-6-cmds-08

Linda Dunbar <linda.dunbar@futurewei.com> Fri, 12 June 2020 17:18 UTC

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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: Brian Haberman <brian@innovationslab.net>, "ops-dir@ietf.org" <ops-dir@ietf.org>
CC: "draft-ietf-ntp-mode-6-cmds.all@ietf.org" <draft-ietf-ntp-mode-6-cmds.all@ietf.org>, "ntp@ietf.org" <ntp@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>
Thread-Topic: Opsdir last call review of draft-ietf-ntp-mode-6-cmds-08
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Date: Fri, 12 Jun 2020 17:18:54 +0000
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Subject: Re: [Ntp] Opsdir last call review of draft-ietf-ntp-mode-6-cmds-08
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Brian, 

Thank you very much for the explanation. It would be great if you can add this explanation to the draft to make the "Historic" draft more self-explanatory. 

Linda Dunbar

-----Original Message-----
From: Brian Haberman <brian@innovationslab.net> 
Sent: Friday, June 12, 2020 12:11 PM
To: Linda Dunbar <linda.dunbar@futurewei.com>; ops-dir@ietf.org
Cc: draft-ietf-ntp-mode-6-cmds.all@ietf.org; ntp@ietf.org; last-call@ietf.org
Subject: Re: Opsdir last call review of draft-ietf-ntp-mode-6-cmds-08

Hi Linda,

On 6/8/20 6:52 PM, Linda Dunbar via Datatracker wrote:
> Reviewer: Linda Dunbar
> Review result: Has Nits
> 
> I have reviewed this document as part of the Ops area directorate's 
> ongoing effort to review all IETF documents being processed by the 
> IESG.  These comments were written primarily for the benefit of the Ops area directors.
> Document editors and WG chairs should treat these comments just like 
> any other last call comments.
> 
> This document describes the structure of the control messages that 
> were historically used with the Network Time Protocol. Being 
> historical document, I would expect the document to give a description 
> on what the Control Message are for, who is the sender, and who is the 
> receiver, is the Control Message broadcast to every node in the 
> network? or only between some nodes? The document describes the bits 
> in detail for Mode =6 and Mode =7. The RFC1305 has a lot of 
> information, but can't pinpoint the Control message's purpose. Are the 
> control messages for distributing time from Stratum 0 to Stratum 1?  or between network nodes?

As Ulrich pointed out, these messages are for controlling/monitoring an running NTP server. These messages are not meant for server-to-server exchanges, rather for "management station" to server exchanges.

As for the "who uses it" question, I thought section 1.2 captured a good representation of that (e.g., ntpdc) for mode 7. Section 1.1 describes the basic framework for the use of mode 6, but doesn't provide a concrete example.

I can craft some text for section 1.1 that explicitly talks about managing NTP servers.

Regards,
Brian

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