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Re: [RTG-DIR] [Last-Call] RtgDir review: draft-ietf-babel-information-model-11.txt

Alexander Vainshtein <Alexander.Vainshtein@rbbn.com> Tue, 20 October 2020 11:20 UTC

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From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
To: Joe Abley <jabley@hopcount.ca>, Geoff Huston <gih@apnic.net>
CC: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "draft-ietf-babel-information-model.all@ietf.org" <draft-ietf-babel-information-model.all@ietf.org>, "babel@ietf.org" <babel@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>
Thread-Topic: [RTG-DIR] [Last-Call] RtgDir review: draft-ietf-babel-information-model-11.txt
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Date: Tue, 20 Oct 2020 11:13:27 +0000
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Subject: Re: [RTG-DIR] [Last-Call] RtgDir review: draft-ietf-babel-information-model-11.txt
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Joe, Geoff and all,

Please see below the text from Section 5.2.7 of RFC 5798<https://tools.ietf.org/html/rfc5798#section-5.2.7> (VRRPv3):



5.2.7<https://tools.ietf.org/html/rfc5798#section-5.2.7>.  Maximum Advertisement Interval (Max Adver Int)





   The Maximum Advertisement Interval is a 12-bit field that indicates

   the time interval (in centiseconds) between ADVERTISEMENTS.  The

   default is 100 centiseconds (1 second).



I.e., the use of centiseconds as units of time in RFCs is not new.



Regards,

Sasha



Office: +972-39266302

Cell:      +972-549266302

Email:   Alexander.Vainshtein@ecitele.com



-----Original Message-----
From: rtg-dir <rtg-dir-bounces@ietf.org> On Behalf Of Joe Abley
Sent: Tuesday, October 20, 2020 1:53 PM
To: Geoff Huston <gih@apnic.net>
Cc: rtg-ads@ietf.org; rtg-dir@ietf.org; draft-ietf-babel-information-model.all@ietf.org; babel@ietf.org; last-call@ietf.org
Subject: Re: [RTG-DIR] [Last-Call] RtgDir review: draft-ietf-babel-information-model-11.txt



(I am not on all these lists in the headers but I'll leave the recipient list intact anyway.)



On Oct 20, 2020, at 06:22, Geoff Huston <gih@apnic.net<mailto:gih@apnic.net>> wrote:



> "centiseconds"? Really? "tenths of seconds" would be clearer to most

> readers!



Perhaps this was intentional, but a centisecond is a hundredth of a second, not a tenth (just as a centimetre is a hundredth of a metre). A tenth of a second is a decisecond.



Centi- is a metric prefix recognised by SI (in which system the second is a base unit) so I think it's fair to say that centisecond is not an outlandish choice of unit, although millisecond would be more consistent in many engineering contexts.



But apparently the SI system units is not taught in schools everywhere even today (notably in much of the US) so maybe spelling it out as you suggest is reasonable.





Joe


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