Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NTP) Options for DHCPv6
"David L. Mills" <mills@udel.edu> Wed, 21 November 2007 04:44 UTC
Return-path: <dhcwg-bounces@ietf.org>
Received: from [127.0.0.1] (helo=stiedprmman1.va.neustar.com) by megatron.ietf.org with esmtp (Exim 4.43) id 1IuhRn-00023c-DG; Tue, 20 Nov 2007 23:44:23 -0500
Received: from [10.91.34.44] (helo=ietf-mx.ietf.org) by megatron.ietf.org with esmtp (Exim 4.43) id 1IuhRm-00023X-9o for dhcwg@ietf.org; Tue, 20 Nov 2007 23:44:22 -0500
Received: from whimsy.udel.edu ([128.4.2.3]) by ietf-mx.ietf.org with esmtp (Exim 4.43) id 1IuhRj-0007s5-KV for dhcwg@ietf.org; Tue, 20 Nov 2007 23:44:22 -0500
Received: by whimsy.udel.edu (Postfix, from userid 62) id DDB4116B6; Wed, 21 Nov 2007 04:43:57 +0000 (UTC)
X-Spam-Checker-Version: SpamAssassin 3.1.1 (2006-03-10) on whimsy.udel.edu
X-Spam-Level:
X-Spam-Status: No, score=-2.1 required=4.1 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.1.1
Received: from [128.4.2.6] (backroom.udel.edu [128.4.2.6]) by whimsy.udel.edu (Postfix) with ESMTP id 9C95115EE; Wed, 21 Nov 2007 04:43:55 +0000 (UTC)
Message-ID: <4743B78A.3070300@udel.edu>
Date: Wed, 21 Nov 2007 04:43:54 +0000
From: "David L. Mills" <mills@udel.edu>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax)
X-Accept-Language: en-us, en
To: ntpwg@lists.ntp.org, dhcwg@ietf.org
Subject: Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NTP) Options for DHCPv6
References: <A05118C6DF9320488C77F3D5459B17B7062ED3C6@xmb-ams-333.emea.cisco.com> <4733482A.7020302@sun.com> <A05118C6DF9320488C77F3D5459B17B70634E4E5@xmb-ams-333.emea.cisco.com> <4735A243.6090905@sun.com> <474109FB.2080508@ntp.org>
In-Reply-To: <474109FB.2080508@ntp.org>
X-Sanitizer: This message has been sanitized!
X-Sanitizer-URL: http://mailtools.anomy.net/
X-Sanitizer-Rev: UDEL-ECECIS: Sanitizer.pm, v 1.64 2002/10/22 MIME-Version: 1.0
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format="flowed"
Content-Transfer-Encoding: 7bit
X-Spam-Score: 0.0 (/)
X-Scan-Signature: a7d6aff76b15f3f56fcb94490e1052e4
Cc:
X-BeenThere: dhcwg@ietf.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: dhcwg.ietf.org
List-Unsubscribe: <https://www1.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:dhcwg@ietf.org>
List-Help: <mailto:dhcwg-request@ietf.org?subject=help>
List-Subscribe: <https://www1.ietf.org/mailman/listinfo/dhcwg>, <mailto:dhcwg-request@ietf.org?subject=subscribe>
Errors-To: dhcwg-bounces@ietf.org
Danny, The one-way delay on a fast Ethernet is usually in the weenieseconds on a fast Ethernet, so I wouldn't worry to much about it. The scenario where the DHCP delay would be useful is when for some reason or other the client cannot use the client/server volley to measure it. A nonzero delay value in the DHCP response would be an explicit indication of that. Davev Danny Mayer wrote: > Brian Utterback wrote: > >> Benoit Lourdelet (blourdel) wrote: >> >>> Considering a central DHCP server, the use of remote-id [RFC4649] or >>> just link-id may tell the server from where the request is coming then >>> giving it the knowledge of the delay to >>> apply. >>> In the case of a DHCP server hosted by the first hop, the DHCP server is >>> well positioned to know the delay. >> >> Oh, agreed, it is possible for the delay to be known. > > > I consider that it is most unlikely for the DHCP server to know the > delay. Consider DHCP server D, client C and NTP server N. Each are in > different locations on the physical wire (wireless and other medium are > similar). D may know its own delay to N but C is elsewhere on the > wire. You might be able to figure out the delay between D and C but how > does it relate to the delay between C and N? They are in different > locations on the wire. Is C closer to N, further away, on another > segment of the network? > > Danny > _______________________________________________ > ntpwg mailing list > ntpwg@lists.ntp.org > https://lists.ntp.org/mailman/listinfo/ntpwg _______________________________________________ dhcwg mailing list dhcwg@ietf.org https://www1.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] Network Time Protocol (NTP) Options for D… Benoit Lourdelet (blourdel)
- [dhcwg] RE: [ntpwg] Network Time Protocol (NTP) O… Benoit Lourdelet (blourdel)
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Bud Millwood
- [dhcwg] Re: [ntpwg] Digital Evidence Standards an… Shane Kerr
- [dhcwg] RE: [ntpwg] Network Time Protocol (NTP) O… Mark Elliot
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Harlan Stenn
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Brian Utterback
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Brian Utterback
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… David L. Mills
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Brian Utterback
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… David L. Mills
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… TS Glassey
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Brian Utterback
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… David L. Mills
- [dhcwg] Digital Evidence Standards and a statemen… TS Glassey
- [dhcwg] Re: [ntpwg] Digital Evidence Standards an… TS Glassey
- [dhcwg] Re: Digital Evidence Standards and a stat… David L. Mills
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ted Lemon
- [dhcwg] Re: [ntpwg] Network Time Protocol (NTP) O… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ralph Droms
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David L. Mills
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ted Lemon
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Brian Utterback
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Brian Utterback
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ted Lemon
- RE: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Benoit Lourdelet (blourdel)
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ralph Droms
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Harlan Stenn
- RE: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Benoit Lourdelet (blourdel)
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Stapp
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Andrews
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Andrews
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Andrews
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Bud Millwood
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Benoit Lourdelet (blourdel)
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… M. Warner Losh
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Benoit Lourdelet (blourdel)
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… anthony.flavin
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Stapp
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… TS Glassey
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brian Utterback
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Mark Stapp
- Re: [dhcwg] Re: [ntpwg] Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David L. Mills
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brad Knowles
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Danny Mayer
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Hal Murray
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brad Knowles
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brad Knowles
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… anthony.flavin
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… David W. Hankins
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Josh Littlefield
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Brzozowski, John
- Re: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Ted Lemon
- Re: [dhcwg] Network Time Protocol (NTP) Options f… Bud Millwood
- Re: [dhcwg] Network Time Protocol (NTP) Options f… Mark Stapp
- Re: [dhcwg] Network Time Protocol (NTP) Options f… Ted Lemon
- RE: [ntpwg] [dhcwg] Re: Network Time Protocol (NT… Woundy, Richard
- Re: [dhcwg] Network Time Protocol (NTP) Options f… Danny Mayer
- RE: [ntpwg] [dhcwg] Network Time Protocol (NTP) O… Richard Gayraud (rgayraud)
- Re: [ntpwg] [dhcwg] Network Time Protocol (NTP) O… Brian Utterback
- Re: [ntpwg] [dhcwg] Network Time Protocol (NTP) O… Brad Knowles
- RE: [ntpwg] [dhcwg] Network Time Protocol (NTP) O… anthony.flavin
- Re: [ntpwg] [dhcwg] Network Time Protocol (NTP) O… Danny Mayer