IETF Logo Mail Archive

Re: [Pce] Eric Rescorla's Discuss on draft-ietf-pce-pcep-exp-codepoints-04: (with DISCUSS)

"Adrian Farrel" <adrian@olddog.co.uk> Mon, 08 January 2018 13:38 UTC

Return-Path: <adrian@olddog.co.uk>
X-Original-To: pce@ietfa.amsl.com
Delivered-To: pce@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DEA1C126C25; Mon, 8 Jan 2018 05:38:46 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.619
X-Spam-Level:
X-Spam-Status: No, score=-2.619 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01] autolearn=ham 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 1kCgOC3-tmg1; Mon, 8 Jan 2018 05:38:44 -0800 (PST)
Received: from asmtp1.iomartmail.com (asmtp1.iomartmail.com [62.128.201.248]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0ACD1126C23; Mon, 8 Jan 2018 05:38:43 -0800 (PST)
Received: from asmtp1.iomartmail.com (localhost.localdomain [127.0.0.1]) by asmtp1.iomartmail.com (8.13.8/8.13.8) with ESMTP id w08DcfMN008066; Mon, 8 Jan 2018 13:38:41 GMT
Received: from 950129200 ([193.57.121.16]) (authenticated bits=0) by asmtp1.iomartmail.com (8.13.8/8.13.8) with ESMTP id w08Dcbb3008049 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 8 Jan 2018 13:38:39 GMT
Reply-To: adrian@olddog.co.uk
From: Adrian Farrel <adrian@olddog.co.uk>
To: 'Eric Rescorla' <ekr@rtfm.com>
Cc: 'The IESG' <iesg@ietf.org>, draft-ietf-pce-pcep-exp-codepoints@ietf.org, pce@ietf.org, pce-chairs@ietf.org
References: <151541400488.11329.13944273689133249504.idtracker@ietfa.amsl.com> <00fe01d38880$651fa340$2f5ee9c0$@olddog.co.uk> <CABcZeBNGdgtpv3yA1LdMNNtG+rGoydwfTo4EdDoAokWn05A27Q@mail.gmail.com>
In-Reply-To: <CABcZeBNGdgtpv3yA1LdMNNtG+rGoydwfTo4EdDoAokWn05A27Q@mail.gmail.com>
Date: Mon, 08 Jan 2018 13:38:38 -0000
Message-ID: <011901d38885$fe5927c0$fb0b7740$@olddog.co.uk>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----=_NextPart_000_011A_01D38885.FE8B0D30"
X-Mailer: Microsoft Outlook 14.0
Thread-Index: AQDUKDhTjZ6b8kX2LexEL8cDJyfWFAKaOlmzAXasiTWlSDJd8A==
Content-Language: en-gb
X-TM-AS-MML: disable
X-TM-AS-Product-Ver: IMSS-7.1.0.1679-8.2.0.1013-23582.005
X-TM-AS-Result: No--27.189-10.0-31-10
X-imss-scan-details: No--27.189-10.0-31-10
X-TMASE-MatchedRID: pS5owHKhBO1dpLkh5p97gwlPus/MSqC7DVR6LU77r+vaqqH/oHw+kcNp aFZXRYnT+D4/c8pyvfrQYszg5zwOGQBT1NXE3ZWCYD9XTRdaMO3rf8CaQGJPThSVYgoSgYGZj9O FavCtDKD9j0d9lN9sig7BZdrDXTSLpUxzcSQ8HaSvPooS+PUQchmyTBaqiJvcqPm/sjj9KBhoca +PSsgvFAti0mx68x2NvlnZ1DvD9GOYGXryYnCM4Y6MisxJraxHJPNIV6GF8mveO9PEHR+j8SxfY 28bytftticv2F4ZpMDw7Epw61REj6SfM79LKvQgTuctSpiuWyUuf8k7mMM6JXQ8D+SLaQjsHEkR fST+Ts4uI29Z9XjQN4cypU5vI8wyw1hXve9gEVCO0rt0LpQGeRSpYqhygmjp6ygMMToK892nhZy bKoFsXELduO9IO73n36y5gCD1lYkzG8Dg48sJ/vIVL3+KSNgwkTzAgHG5eNKgJH974mpbq6gTkL gTtTggXql2hIcwl2sTHy/6jlpjHT4gGkEowIKZNs3S39zaoXYU2wesiIXyuxW+93iqRvX7VD4IX 3GhzkucTZGiBUd8fawQUp5/xlTG2ygMnPk4DNxjiC4p+/AIFjMffNZYCk3DS8CF3gNU2V36Rhfg VWdC5yjWpTzwfCW1TDTwHP13kXJP5mzaUz6wQBD3+0w1DhqK3kR1SkDo278ML9Wb3Qh/ha0QmL2 wrxWPWU8XtC6NtyQqhZrv4f7cO34FjWYN+jMve5NWR5iixe3KIGMaZvT024hIjrzeyQMKGoZzuF 63mGbwpvAauYPakRQAXi4Ga9GRHxPMjOKY7A+DGx/OQ1GV8gGlEJORGTlJ/nnwJ52QYi+krM0hG GV5wz/Q7SHYTZvwGZChOdr75cEIGWTP497xkotlMZNOIOIRftwZ3X11IV0=
Archived-At: <https://mailarchive.ietf.org/arch/msg/pce/T-IUA3eZ2MH9t1TyB-pFVPibg4U>
Subject: Re: [Pce] Eric Rescorla's Discuss on draft-ietf-pce-pcep-exp-codepoints-04: (with DISCUSS)
X-BeenThere: pce@ietf.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Path Computation Element <pce.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/pce>, <mailto:pce-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/pce/>
List-Post: <mailto:pce@ietf.org>
List-Help: <mailto:pce-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/pce>, <mailto:pce-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Jan 2018 13:38:47 -0000

Hmmm, how about a bis for 3692?
 
Seriously, you think every document that defines an Experimental protocol range must describe the processing that an implementation must do if someone is ill-advised enough to run two experiments with overlapping experiments in the same network?
 
Presumably, at some level the PDUs will be considered malformed and an alert raised. Possibly (although it seems highly unlikely) the PDUs will be interpreted as valid and cause entertaining results.
 
But so what? You are not supposed to expect anything other than a crash! You are not supposed to run conflicting experiments and failure does not need to be graceful.
 
There is nothing new here! Nothing new in this document. Nothing to see, move along now.
 
Adrian
 
From: Eric Rescorla [mailto:ekr@rtfm.com] 
Sent: 08 January 2018 13:19
To: Adrian Farrel
Cc: The IESG; draft-ietf-pce-pcep-exp-codepoints@ietf.org; pce@ietf.org; pce-chairs@ietf.org
Subject: Re: [Pce] Eric Rescorla's Discuss on draft-ietf-pce-pcep-exp-codepoints-04: (with DISCUSS)
 
 
Hi Adrian,
 
Thanks for your thoughts.
 
 
On Mon, Jan 8, 2018 at 4:58 AM, Adrian Farrel <adrian@olddog.co.uk> wrote:
The purpose of this document is to adjust the registries to allow
experimentation, not to redefine or refine the meaning of Experimental
codepoints.

We do draw out the security concern that we think 3692 glossed over, but this is
a reminder to protocol specs or implementers that they must watch out. This is
not a protocol spec and doesn't need to describe how implementations handle
conflicts.
 
No, but it does need to describe the impact of what happens when there is confusion, which it presently does not. This is not solely a security concern but also an interoperability and correctness concern.
 
-Ekr
 

Ciao,
Adrian

v2.23.0 | Report a Bug | By Email