IETF Logo Mail Archive

Re: [ntpwg] [dhcwg] Fwd: New Version Notification for draft-ogud-dhc-udp-time-option-01.txt

Warner Losh <imp@bsdimp.com> Mon, 02 December 2013 18:13 UTC

Return-Path: <ntpwg-bounces+ntp-archives-ahfae6za=lists.ietf.org@lists.ntp.org>
X-Original-To: ietfarch-ntp-archives-ahFae6za@ietfa.amsl.com
Delivered-To: ietfarch-ntp-archives-ahFae6za@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6935B1AD9B8 for <ietfarch-ntp-archives-ahFae6za@ietfa.amsl.com>; Mon, 2 Dec 2013 10:13:20 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.201
X-Spam-Level:
X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IkPRHP6YmQwa for <ietfarch-ntp-archives-ahFae6za@ietfa.amsl.com>; Mon, 2 Dec 2013 10:13:18 -0800 (PST)
Received: from lists.ntp.org (lists.ntp.org [149.20.68.7]) by ietfa.amsl.com (Postfix) with ESMTP id 795D81AD959 for <ntp-archives-ahFae6za@lists.ietf.org>; Mon, 2 Dec 2013 10:13:18 -0800 (PST)
Received: from lists.ntp.org (lists.ntp.org [149.20.68.7]) by lists.ntp.org (Postfix) with ESMTP id 738D786DAEC for <ntp-archives-ahFae6za@lists.ietf.org>; Mon, 2 Dec 2013 18:13:16 +0000 (UTC)
X-Original-To: ntpwg@lists.ntp.org
Delivered-To: ntpwg@lists.ntp.org
Received: from mail1.ntp.org (mail1.ntp.org [IPv6:2001:4f8:fff7:1::5]) by lists.ntp.org (Postfix) with ESMTP id E223086D422 for <ntpwg@lists.ntp.org>; Mon, 2 Dec 2013 18:13:07 +0000 (UTC)
Received: from mail-ie0-f174.google.com ([209.85.223.174]) by mail1.ntp.org with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77 (FreeBSD)) (envelope-from <imp@bsdimp.com>) id 1VnXzV-000Eic-UZ for ntpwg@lists.ntp.org; Mon, 02 Dec 2013 18:13:07 +0000
Received: by mail-ie0-f174.google.com with SMTP id at1so21479277iec.33 for <ntpwg@lists.ntp.org>; Mon, 02 Dec 2013 10:13:00 -0800 (PST)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=cfYwbFBhUBk+5kYSFEOqd73pn2n2nOvfZ+S7Tc8+O7A=; b=Gc6jL9zhFjqAtp7MbAAuitX+00WGwCuw8qbpyEvzO2TYoywkEr5IvYMAqD6BZWDqz+ dbrOaaI+3Ooo4RwvWrKZ4AsM5MJ9fJsx1+mueXGLwdfpbhPgj20vWSQnNY/2wSi3TL8q AICtFqz3EEA8eJaU0TJsZRWfPfKB0EEnRMDkAlgRre8Y4zsA5l3knRV+LxBrd5l48xS3 hm9jJ6BD49CNU4HjcrmQw24gT3dJek2g5j+y/cxztMjOWXsLzlnyP/OVke89dv2FUg18 1igMRGxES6r3zVwaQ75bfuJ1QRw7k3QnfZOt9G21zKn0Oh2e6Cn67RpZizPcvO23dog+ 8g8A==
X-Gm-Message-State: ALoCoQk+arI5kK+R/ncENJm13gGdcZ24/XHL9PygWl+duCQAA8VwxDwVIIiurzGynLh2N6G/gbxl
X-Received: by 10.42.42.132 with SMTP id t4mr1929976ice.90.1386007980059; Mon, 02 Dec 2013 10:13:00 -0800 (PST)
Received: from fusionlt2834a.int.fusionio.com ([209.117.142.2]) by mx.google.com with ESMTPSA id x5sm67786946iga.6.2013.12.02.10.12.59 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 02 Dec 2013 10:12:59 -0800 (PST)
Mime-Version: 1.0 (Apple Message framework v1085)
From: Warner Losh <imp@bsdimp.com>
In-Reply-To: <4AA650D3-2AD2-4C83-8450-DC3926AC9416@nominum.com>
Date: Mon, 02 Dec 2013 11:12:57 -0700
Message-Id: <7C1A1F32-EED7-4990-A550-DB66BAB6AAD4@bsdimp.com>
References: <20131202044734.B78E0406060@ip-64-139-1-69.sjc.megapath.net> <529C1A31.2080900@ntp.org> <258D838F-F4BA-45D2-AA41-BB05E3AB147C@ogud.com> <529CA616.3010402@ntp.org> <19575403-444E-4CBA-8818-5F46328787AE@bsdimp.com> <4AA650D3-2AD2-4C83-8450-DC3926AC9416@nominum.com>
To: Ted Lemon <ted.lemon@nominum.com>
X-Mailer: Apple Mail (2.1085)
X-SA-Exim-Connect-IP: 209.85.223.174
X-SA-Exim-Rcpt-To: ntpwg@lists.ntp.org
X-SA-Exim-Mail-From: imp@bsdimp.com
X-SA-Exim-Version: 4.2
X-SA-Exim-Scanned: Yes (on mail1.ntp.org)
Cc: Hal Murray <hmurray@megapathdsl.net>, Bernie Volz <volz@cisco.com>, NTP Working Group <ntpwg@lists.ntp.org>, "dhcwg@ietf.org WG" <dhcwg@ietf.org>
Subject: Re: [ntpwg] [dhcwg] Fwd: New Version Notification for draft-ogud-dhc-udp-time-option-01.txt
X-BeenThere: ntpwg@lists.ntp.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: IETF Working Group for Network Time Protocol <ntpwg.lists.ntp.org>
List-Unsubscribe: <http://lists.ntp.org/options/ntpwg>, <mailto:ntpwg-request@lists.ntp.org?subject=unsubscribe>
List-Archive: <http://lists.ntp.org/pipermail/ntpwg>
List-Post: <mailto:ntpwg@lists.ntp.org>
List-Help: <mailto:ntpwg-request@lists.ntp.org?subject=help>
List-Subscribe: <http://lists.ntp.org/listinfo/ntpwg>, <mailto:ntpwg-request@lists.ntp.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: ntpwg-bounces+ntp-archives-ahfae6za=lists.ietf.org@lists.ntp.org
Sender: ntpwg-bounces+ntp-archives-ahfae6za=lists.ietf.org@lists.ntp.org

On Dec 2, 2013, at 10:12 AM, Ted Lemon wrote:

> On Dec 2, 2013, at 10:32 AM, Warner Losh <imp@bsdimp.com> wrote:
>> Assuming the tolerance for this application is >> 1s, this won't matter, but might be worth specifying that during a leap second, the value returned shall be either the value of the prior second or the value of the next second to make it conform to most current usage.
> 
> I think the expectation is that the time will be updated with a more accurate mechanism later, and an error of 1s is not worth worrying about for typical devices, so this is almost certainly overkill.

This isn't to prevent an error of a second, but to bound the error to a second by adopting the main work arounds that are in practice today which do that.

Warner

_______________________________________________
ntpwg mailing list
ntpwg@lists.ntp.org
http://lists.ntp.org/listinfo/ntpwg

v2.23.0 | Report a Bug | By Email