Re: [AVTCORE] AD review of draft-ietf-avtcore-leap-second
Kevin Gross <kevin.gross@avanw.com> Sun, 15 December 2013 00:29 UTC
Return-Path: <kevin.gross@avanw.com>
X-Original-To: avt@ietfa.amsl.com
Delivered-To: avt@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E8E091ADF6D for <avt@ietfa.amsl.com>; Sat, 14 Dec 2013 16:29:01 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.498
X-Spam-Level:
X-Spam-Status: No, score=-0.498 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, SPF_NEUTRAL=0.779] autolearn=no
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 FWSUwEP9xC5H for <avt@ietfa.amsl.com>; Sat, 14 Dec 2013 16:28:59 -0800 (PST)
Received: from qmta15.westchester.pa.mail.comcast.net (qmta15.westchester.pa.mail.comcast.net [IPv6:2001:558:fe14:44:76:96:59:228]) by ietfa.amsl.com (Postfix) with ESMTP id 558AC1ADF65 for <avt@ietf.org>; Sat, 14 Dec 2013 16:28:58 -0800 (PST)
Received: from omta01.westchester.pa.mail.comcast.net ([76.96.62.11]) by qmta15.westchester.pa.mail.comcast.net with comcast id 1b751n0030EZKEL5FcUr75; Sun, 15 Dec 2013 00:28:51 +0000
Received: from mail-we0-f177.google.com ([74.125.82.177]) by omta01.westchester.pa.mail.comcast.net with comcast id 1cSq1n00Q3pZ1Te3McSr0s; Sun, 15 Dec 2013 00:26:51 +0000
Received: by mail-we0-f177.google.com with SMTP id u56so3245606wes.22 for <avt@ietf.org>; Sat, 14 Dec 2013 16:26:50 -0800 (PST)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Zk29ut7gzVFlmxakw6XZBVsTD4Zx4CvCd7KK3Qsab4A=; b=RF6Nk4rpuTbkmj0FmTkmc3/1PHyHlT1hRqsXiIoa0yFTUN96SrgH5UZ/G0i8t0vonM wcQXWaEezmIAttp6SfdqeNBSuNApExMDCiDxgHU5KgybZj0m3vQXK7T8M+fQzNfFTsVq rGpQlaSJjrMopUYyLGpeLjiR2EM2pzJvPi869M8OrTqoMthxjiCYX13Uaj2di/AXsG2t ZK0gaZvS41b9gxa7jAVTH+hcEfUyqXPuzpXYPJmNdQwsR6Cjx3YqrQaS9ufWzJbo5IVr dmRjmciquoqzMxiU44rEfw2VOBElDHXDblRY6ftPkysHDnpG4sEMFxaIGeK/OaHgaEPL 5hPA==
MIME-Version: 1.0
X-Received: by 10.180.94.7 with SMTP id cy7mr8118330wib.21.1387067210135; Sat, 14 Dec 2013 16:26:50 -0800 (PST)
Received: by 10.217.124.136 with HTTP; Sat, 14 Dec 2013 16:26:50 -0800 (PST)
In-Reply-To: <CAL02cgSLAPvaAZfdKrky53cVpB+Nqqhgj=RqMbYobOnWT3vwgw@mail.gmail.com>
References: <CAL02cgSLAPvaAZfdKrky53cVpB+Nqqhgj=RqMbYobOnWT3vwgw@mail.gmail.com>
Date: Sat, 14 Dec 2013 17:26:50 -0700
Message-ID: <CALw1_Q3JvOLhYCnUPcfyeZhtphJk9_+vK1ozdQcicZ6nGGBq7w@mail.gmail.com>
From: Kevin Gross <kevin.gross@avanw.com>
To: Richard Barnes <rlb@ipv.sx>
Content-Type: multipart/alternative; boundary="f46d0444037257015704ed87c00f"
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1387067331; bh=Zk29ut7gzVFlmxakw6XZBVsTD4Zx4CvCd7KK3Qsab4A=; h=Received:Received:Received:MIME-Version:Received:Date:Message-ID: Subject:From:To:Content-Type; b=iioBdnawFhl4g/jw2nO5k8n/4esYMu5PAJSvgMNFi0CAAgtuLelW/kKzlniyLmT+Y uxWhgNKKHjMtpy0fYhT2ziZ5gRKUJhfSa81XmOjAmOzyF+bXCQAxZn8DglPFYTizxx jVsBeA6zhWWk8dnRGpPE8vY+gbH0GDaluCf8FlEabvwUxykV2N4wIiBv8+utXF2cnK D8UJv9PEnfgrkTWa52aanbCmGUWPbDkf9aFfYlOvpM9M0fZghWUa5eOQthM3/m+3S0 GavvlkvuiApOcvTIg9dgM0DxK/gQpHrfn7YD0L4QyNPBjDksQAmiCH4VdVec9ue+sf R7idsWx4PlNRw==
Cc: "avtcore-chairs@tools.ietf.org" <avtcore-chairs@tools.ietf.org>, draft-ietf-avtcore-leap-second@tools.ietf.org, "avt@ietf.org" <avt@ietf.org>
Subject: Re: [AVTCORE] AD review of draft-ietf-avtcore-leap-second
X-BeenThere: avt@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Audio/Video Transport Core Maintenance <avt.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/avt>, <mailto:avt-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/avt/>
List-Post: <mailto:avt@ietf.org>
List-Help: <mailto:avt-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/avt>, <mailto:avt-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 15 Dec 2013 00:29:03 -0000
Thanks for the suggestion Richard. I propose to insert the following paragraph at the beginning of section 5.1: "In order to avoid generating or using NTP timestamps during positive leap seconds, RTP senders and receivers need to avoid sending or using sender reports to synchronize their clocks in the vicinity of a leap second and instead rely on their internal clocks to maintain sync until the leap second has passed." I will also fix the editorial nit as you suggest. Kevin Gross +1-303-447-0517 Media Network Consultant AVA Networks - www.AVAnw.com <http://www.avanw.com/> On Sun, Nov 24, 2013 at 1:07 PM, Richard Barnes <rlb@ipv.sx> wrote: > I have reviewed this draft in preparation for IETF LC, and think it looks > good to go. > > One thing the authors might keep in mind while doing any LC or DISCUSS > edits is that it may not be immediately clear to the reader how suppressing > or ignoring SRs (Section 5.1) is helpful with this problem. There's a > line in Section 5 that explains this ("generating or using NTP timestamps > ... SHOULD be avoided"), but it would be helpful to tie the two ideas > together. Perhaps something like this at the beginning of Section 5.1: > NEW: "In order to avoid generating or using NTP timestamps during periods > where confusion might arise (see above), RTP senders and receivers need to > avoid using RTCP Sender Reports (SRs) to synchronize their clocks during > this window, instead relying on their internal clocks to maintain sync in > the vicinity of a leap second." > > Editorial nit: In Section 5, > OLD: "the timestamp ambiguity, positive leap seconds" > NEW: "the timestamp ambiguity that positive leap seconds" > > Thanks, > --Richard > > _______________________________________________ > Audio/Video Transport Core Maintenance > avt@ietf.org > https://www.ietf.org/mailman/listinfo/avt > >
- [AVTCORE] AD review of draft-ietf-avtcore-leap-se… Richard Barnes
- Re: [AVTCORE] AD review of draft-ietf-avtcore-lea… Kevin Gross