IETF Logo Mail Archive

Re: [Isis-wg] Proposed isis-wg documents - draft-ginsberg-isis-route-preference-00

Christian Hopps <chopps@rawdofmt.org> Thu, 21 August 2014 06:55 UTC

Return-Path: <chopps@rawdofmt.org>
X-Original-To: isis-wg@ietfa.amsl.com
Delivered-To: isis-wg@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 731911A06D2 for <isis-wg@ietfa.amsl.com>; Wed, 20 Aug 2014 23:55:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham
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 pgjHJy75IIsd for <isis-wg@ietfa.amsl.com>; Wed, 20 Aug 2014 23:55:14 -0700 (PDT)
Received: from mail-pd0-f176.google.com (mail-pd0-f176.google.com [209.85.192.176]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9F12D1A068A for <isis-wg@ietf.org>; Wed, 20 Aug 2014 23:55:14 -0700 (PDT)
Received: by mail-pd0-f176.google.com with SMTP id y10so13273686pdj.7 for <isis-wg@ietf.org>; Wed, 20 Aug 2014 23:55:14 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=z8m3ACFfnSDr8CPmL1TcmCCQtl6iyccdbXAfUba38Ho=; b=jf2OOY+enLSOhrpv97AYTTOlB0dKlLoSmCQauE/XIVCNno3M6WHt5f7cawESeN13Y5 wdfOHHnqxiMwz3NORGgpQ0/B08zZr+IOWBpAE8OKKqK2+Bhh8ry56QYD1u0phtbGNLfm YTiFJ3gHOcR33+RdUGbmR+Jjj/yCNkKW9wx4ouX2VeO+sfWhLTYaEn3VhQzyJ7D/xP4T ZTff5HZvVWaWc2VvX0dDqmpQ5nmm0gjpgK6CmHp2C6bMQla8unpzJcdf/5zxUqn4arfW Oyt+w/YdWk9IceP1Vfy3Vpw4v8NL4lFGTgnjn5DCiSPbumjf16aIiVFklOdEBbBB3qnB m50A==
X-Gm-Message-State: ALoCoQmuqw/8qFVRvnTg1oyf1wlFYA/S9p4bhhn0Bu2Ddejywa4vtvru7/M1pcHFhJfCMa/IIq6L
X-Received: by 10.68.143.165 with SMTP id sf5mr58382351pbb.103.1408604114213; Wed, 20 Aug 2014 23:55:14 -0700 (PDT)
Received: from [192.168.1.3] (c-71-227-97-41.hsd1.mi.comcast.net. [71.227.97.41]) by mx.google.com with ESMTPSA id kq7sm24379446pbc.90.2014.08.20.23.55.12 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 20 Aug 2014 23:55:13 -0700 (PDT)
Content-Type: text/plain; charset="windows-1252"
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
From: Christian Hopps <chopps@rawdofmt.org>
In-Reply-To: <1B502206DFA0C544B7A60469152008633F35A17A@eusaamb105.ericsson.se>
Date: Thu, 21 Aug 2014 02:55:09 -0400
Content-Transfer-Encoding: quoted-printable
Message-Id: <FF710BB8-0275-401E-BA3F-3ACC6D40BDE6@rawdofmt.org>
References: <1B502206DFA0C544B7A60469152008633F35A17A@eusaamb105.ericsson.se>
To: Uma Chunduri <uma.chunduri@ericsson.com>
X-Mailer: Apple Mail (2.1878.6)
Archived-At: http://mailarchive.ietf.org/arch/msg/isis-wg/Sxkpa2De9tBE_Q_Swgpp2MwOFpQ
Cc: Hannes Gredler <hannes@juniper.net>, Christian Hopps <chopps@rawdofmt.org>, "isis-wg@ietf.org list" <isis-wg@ietf.org>
Subject: Re: [Isis-wg] Proposed isis-wg documents - draft-ginsberg-isis-route-preference-00
X-BeenThere: isis-wg@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: IETF IS-IS working group <isis-wg.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/isis-wg>, <mailto:isis-wg-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/isis-wg/>
List-Post: <mailto:isis-wg@ietf.org>
List-Help: <mailto:isis-wg-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/isis-wg>, <mailto:isis-wg-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 21 Aug 2014 06:55:16 -0000

On Aug 20, 2014, at 11:04 PM, Uma Chunduri <uma.chunduri@ericsson.com> wrote:

> We know  multiple  places  in 5302 and 5305 it's clearly said "Down" bit MUST NOT be set in L2. 
> But I see the corner case in Section 4.1  where "Down" bit was allowed in the same level.
> 
> Now if that is the premise of this work - let's focus bit more on the problem see as described in Appendix A;
> 
> " o  R2 has two possible paths to reach 10/8, Level 2 route with metric
>      2002, up/down bit is 0 (from R0) and Level 2 route with metric
>      101, up/down bit is 1 (from R3).  R2 selects R1 as nexthop to 10/8
>      because it prefers the route which does NOT have up/down bit set."
> 
> 
> Why? 
> Please clarify, which document said exactly prefer a route "which does NOT have up/down bit set". 
> 
> I could not see it neither in 5302 nor in 5305. To me this is R2 implementation issue (NOT a protocol issue) in dealing with 135s.

Unfortunately it says this for IPv6 in RFC 5308. It’s not hard to imagine an implementation using those preferences for both address families, particularly given that RFC5 5308 claims to be making the same changes as RFC 5305.

Thanks,
Chris.

> 
> 
> --
> Uma C.
> PS: Thanks both Hannes and Chris to check back if my question (asked partially at Toronto) has been addressed.
> 
> -----Original Message-----
> From: Isis-wg [mailto:isis-wg-bounces@ietf.org] On Behalf Of Christian Hopps
> Sent: Tuesday, August 19, 2014 4:48 AM
> To: isis-wg@ietf.org list
> Cc: Hannes Gredler; Christian Hopps
> Subject: [Isis-wg] Proposed isis-wg documents.
> 
> Hi Folks,
> 
> During the last meeting in Toronto there was good support for making the below drafts WG documents. Unless objections are posted to the list by Friday we will move forward with doing this.
> 
> Proposed WG Documents:
> 
> 	draft-ginsberg-isis-sbfd-discriminator-00
> 	draft-ginsberg-isis-route-preference-00
> 	draft-litkowski-isis-yang-isis-cfg-01
> 
> Thanks,
> Chris & Hannes.
> _______________________________________________
> Isis-wg mailing list
> Isis-wg@ietf.org
> https://www.ietf.org/mailman/listinfo/isis-wg

v2.23.0 | Report a Bug | By Email