Re: [Idr] 2 week WG LC for draft-ietf-custom-decision (4/20 to 5/4/2015)

<bruno.decraene@orange.com> Mon, 06 February 2017 15:51 UTC

Return-Path: <bruno.decraene@orange.com>
X-Original-To: idr@ietfa.amsl.com
Delivered-To: idr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED5EB129E9A for <idr@ietfa.amsl.com>; Mon, 6 Feb 2017 07:51:12 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.619
X-Spam-Level:
X-Spam-Status: No, score=-1.619 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, FREEMAIL_REPLY=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001] autolearn=no 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 QqZD8N3y3eDv for <idr@ietfa.amsl.com>; Mon, 6 Feb 2017 07:51:12 -0800 (PST)
Received: from relais-inet.orange.com (mta136.mail.business.static.orange.com [80.12.70.36]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BE6A9129E89 for <idr@ietf.org>; Mon, 6 Feb 2017 07:51:11 -0800 (PST)
Received: from opfednr02.francetelecom.fr (unknown [xx.xx.xx.66]) by opfednr23.francetelecom.fr (ESMTP service) with ESMTP id 5928FC062E; Mon, 6 Feb 2017 16:51:10 +0100 (CET)
Received: from Exchangemail-eme2.itn.ftgroup (unknown [xx.xx.31.58]) by opfednr02.francetelecom.fr (ESMTP service) with ESMTP id 1C852120055; Mon, 6 Feb 2017 16:51:10 +0100 (CET)
Received: from OPEXCLILM21.corporate.adroot.infra.ftgroup ([fe80::e92a:c932:907e:8f06]) by OPEXCLILM33.corporate.adroot.infra.ftgroup ([fe80::3881:fc15:b4b2:9017%19]) with mapi id 14.03.0319.002; Mon, 6 Feb 2017 16:51:09 +0100
From: <bruno.decraene@orange.com>
To: Robert Raszuk <robert@raszuk.net>
Thread-Topic: [Idr] 2 week WG LC for draft-ietf-custom-decision (4/20 to 5/4/2015)
Thread-Index: AQHSgIyGbzqBqbwli0WLinaFdrSzRqFcHl7g
Date: Mon, 6 Feb 2017 15:51:09 +0000
Message-ID: <25903_1486396270_58989B6E_25903_18304_1_53C29892C857584299CBF5D05346208A1ED3AA24@OPEXCLILM21.corporate.adroot.infra.ftgroup>
References: <015e01d07ba1$0042bff0$00c83fd0$@ndzh.com> <25797_1429696420_55376FA4_25797_3139_1_53C29892C857584299CBF5D05346208A0EBAA545@PEXCVZYM11.corporate.adroot.infra.ftgroup> <D24E929A.E0D85%aretana@cisco.com> <30646_1447691076_564A0344_30646_2291_1_53C29892C857584299CBF5D05346208A0F6BC240@OPEXCLILM21.corporate.adroot.infra.ftgroup> <D26F8B7E.EA6BA%aretana@cisco.com> <9781_1447749309_564AE6BD_9781_1504_1_53C29892C857584299CBF5D05346208A0F6BD227@OPEXCLILM21.corporate.adroot.infra.ftgroup> <CFE79035-2FFA-4B7A-9574-80D46137E3DF@cisco.com> <9107_1486393618_58989112_9107_17700_1_53C29892C857584299CBF5D05346208A1ED3A87C@OPEXCLILM21.corporate.adroot.infra.ftgroup> <CA+b+ER=MPyPzTf1=tckSkv+XLDPf-nsEM6AAC+F3KT-d3jS3RA@mail.gmail.com>
In-Reply-To: <CA+b+ER=MPyPzTf1=tckSkv+XLDPf-nsEM6AAC+F3KT-d3jS3RA@mail.gmail.com>
Accept-Language: fr-FR, en-US
Content-Language: fr-FR
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [10.168.234.3]
Content-Type: multipart/alternative; boundary="_000_53C29892C857584299CBF5D05346208A1ED3AA24OPEXCLILM21corp_"
MIME-Version: 1.0
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/9Hol1s2sFqUpwi7S_Lfrd-b4dow>
Cc: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
Subject: Re: [Idr] 2 week WG LC for draft-ietf-custom-decision (4/20 to 5/4/2015)
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Inter-Domain Routing <idr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/idr>, <mailto:idr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/idr/>
List-Post: <mailto:idr@ietf.org>
List-Help: <mailto:idr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/idr>, <mailto:idr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 06 Feb 2017 15:51:13 -0000

Hi Robert,

Please see inline [Bruno]

From: rraszuk@gmail.com [mailto:rraszuk@gmail.com] On Behalf Of Robert Raszuk
Sent: Monday, February 06, 2017 4:20 PM
To: DECRAENE Bruno IMT/OLN
Cc: Alvaro Retana (aretana); idr@ietf.org; Susan Hares
Subject: Re: [Idr] 2 week WG LC for draft-ietf-custom-decision (4/20 to 5/4/2015)

Hi Bruno,

On my side, I’d propose
OLD: the propagation of Cost Communities MUST be disabled by default
NEW: the use of Cost Communities MUST be disabled by default

​Do you really think it is safe to propagate ​information which can completely overwrite Best Path without applying it locally ?

[Bruno]
1) IIRC, this is exactly what this document does, for all BGP speakers which do not support the cost-community.
2) I’ve said that both choices can lead to forwarding loops. Where do you see that I said it was safe?


If we are really to change this text how about this:

NEW: The use of Cost Communities MUST be disabled by default. The propagation may occur by default only on those BGP speakers which do not set next hop self.
[Bruno] I’m fine with the first sentence.
The second sentence introduces a behavior which is per route (rather than per node currently). I don’t really see a strong enough reason for this additional complexity. Especially given that all non-compliant router will propagate it in all cases.

Cheers,
Bruno


​Cheers,
R.
​


_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.

This message and its attachments may contain confidential or privileged information that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and delete this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.
Thank you.