Re: [Ntp] NTS4UPTP Rev 03 - Formal request for WG adoption

Danny Mayer <mayer@pdmconsulting.net> Tue, 01 June 2021 17:54 UTC

Return-Path: <mayer@pdmconsulting.net>
X-Original-To: ntp@ietfa.amsl.com
Delivered-To: ntp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E20443A21CF for <ntp@ietfa.amsl.com>; Tue, 1 Jun 2021 10:54:34 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_BLOCKED=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=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 J7EKsSAeorAw for <ntp@ietfa.amsl.com>; Tue, 1 Jun 2021 10:54:30 -0700 (PDT)
Received: from chessie.everett.org (chessie.everett.org [66.220.13.234]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E9E713A21D1 for <ntp@ietf.org>; Tue, 1 Jun 2021 10:54:30 -0700 (PDT)
Received: from newusers-MBP.fios-router.home (pool-108-26-179-179.bstnma.fios.verizon.net [108.26.179.179]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by chessie.everett.org (Postfix) with ESMTPSA id 4FvftT07h6zMNLL; Tue, 1 Jun 2021 17:54:24 +0000 (UTC)
To: Daniel Franke <dfoxfranke@gmail.com>
Cc: Heiko Gerstung <heiko.gerstung=40meinberg.de@dmarc.ietf.org>, Miroslav Lichvar <mlichvar@redhat.com>, NTP WG <ntp@ietf.org>
References: <7F9B8D13-BC90-4E15-9BDF-81714DF0F0C6@meinberg.de> <YLYCLIEA4/unB6/5@localhost> <1DAA3605-CC04-46DE-8CFC-975BED7D4160@meinberg.de> <YLYheZYTSflAdlrF@localhost> <CEB3F4AA-E318-4540-BD6C-4437E3F5F58A@meinberg.de> <YLY3f2/5k1Hjebf7@localhost> <7167BC2B-1889-4DF5-AF7C-BAAAB3586841@meinberg.de> <YLZVS4jwGOnMIk6g@localhost> <8f89741a-dd69-e688-5954-f222ab7652ac@pdmconsulting.net> <CAJm83bDf0966xLo2sXfg5jwN7yVZkVx1z8dNT-NW-dE3XdA4LQ@mail.gmail.com>
From: Danny Mayer <mayer@pdmconsulting.net>
Message-ID: <084b1615-9f01-ebc7-62d4-df1bd95820c1@pdmconsulting.net>
Date: Tue, 1 Jun 2021 13:54:24 -0400
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.2
MIME-Version: 1.0
In-Reply-To: <CAJm83bDf0966xLo2sXfg5jwN7yVZkVx1z8dNT-NW-dE3XdA4LQ@mail.gmail.com>
Content-Type: multipart/alternative; boundary="------------BFC3508016C4EA7068CBD96E"
Content-Language: en-US
Archived-At: <https://mailarchive.ietf.org/arch/msg/ntp/E5XGJOOh1f9LfMEewf9m-xPSCZk>
Subject: Re: [Ntp] NTS4UPTP Rev 03 - Formal request for WG adoption
X-BeenThere: ntp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: <ntp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ntp>, <mailto:ntp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ntp/>
List-Post: <mailto:ntp@ietf.org>
List-Help: <mailto:ntp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ntp>, <mailto:ntp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 01 Jun 2021 17:54:35 -0000

Noone should be using a polling interval that small. Oversampling is as 
bad as undersampling.

Danny

On 6/1/21 1:28 PM, Daniel Franke wrote:
> It's in units of log2(seconds) so a negative value makes fine sense. 
> E.g. -1 means half a second.
>
> On Tue, Jun 1, 2021, 13:24 Danny Mayer <mayer@pdmconsulting.net 
> <mailto:mayer@pdmconsulting.net>> wrote:
>
>
>     On 6/1/21 11:42 AM, Miroslav Lichvar wrote:
>     >
>     > I'm not sure I follow here. You can send NTP requests at any
>     rate you
>     > like. That doesn't require a new protocol. The poll field is a
>     signed
>     > 8-bit integer if you had a server that actually looked in the
>     content
>     > of the field.
>
>     I hope not. How would you implement a negative poll interval? :)
>
>     It really should be unsigned. If not, then that's really an error.
>
>     Danny
>
>     _______________________________________________
>     ntp mailing list
>     ntp@ietf.org <mailto:ntp@ietf.org>
>     https://www.ietf.org/mailman/listinfo/ntp
>     <https://www.ietf.org/mailman/listinfo/ntp>
>
>
> _______________________________________________
> ntp mailing list
> ntp@ietf.org
> https://www.ietf.org/mailman/listinfo/ntp