IETF Logo Mail Archive

Re: [homenet] [Babel-users] Detecting bridges

Mitar <mmitar@gmail.com> Wed, 16 December 2015 23:42 UTC

Return-Path: <mmitar@gmail.com>
X-Original-To: homenet@ietfa.amsl.com
Delivered-To: homenet@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 842881A90EF for <homenet@ietfa.amsl.com>; Wed, 16 Dec 2015 15:42:48 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] 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 EzC0Ztsjpub1 for <homenet@ietfa.amsl.com>; Wed, 16 Dec 2015 15:42:46 -0800 (PST)
Received: from mail-ig0-x229.google.com (mail-ig0-x229.google.com [IPv6:2607:f8b0:4001:c05::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 154971A90F8 for <homenet@ietf.org>; Wed, 16 Dec 2015 15:42:46 -0800 (PST)
Received: by mail-ig0-x229.google.com with SMTP id to18so72010182igc.0 for <homenet@ietf.org>; Wed, 16 Dec 2015 15:42:46 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Ii5slFdhxjpQ/pSY4Vh+Hq2saSN+uvlAUQNsu7ZNQ84=; b=WxOLCHuK4WJZCwoszNwc+XbLaMnr7jXGF4fBLaJ6Ijpq9H7Q/hZWxe2iC+NBlqz6L8 GWas3VugPwFrr3a1i36vNdWzM7gsxyIDKlmjgpGomaULmRUVr1AklaT3sn+n9VcIbWXX aaCd5EG8jIDWeFrtE4cR+iKq1/5loDaciYwXgdotfOu+CBXV8UGPiEvetKZHdR7seXDA czY2TmiHpsgBUrRAMtPcMQjV81lV9fdQGdRboiJFWmcPyy+fG8C6179fWXg9iTK2nBF+ ALqahudeNK2GHBZy+DXpw2isjP+I9s7NjoYNgK8pJn4ofTfHDMVOUIr60h7Y4PmSko0t b5JA==
MIME-Version: 1.0
X-Received: by 10.50.13.72 with SMTP id f8mr532732igc.38.1450309365539; Wed, 16 Dec 2015 15:42:45 -0800 (PST)
Received: by 10.107.173.143 with HTTP; Wed, 16 Dec 2015 15:42:45 -0800 (PST)
In-Reply-To: <87twni49ag.wl-jch@pps.univ-paris-diderot.fr>
References: <566426C4.9000901@kos.mx> <7ia8pm1uuy.wl-jch@pps.univ-paris-diderot.fr> <5665A96A.8040708@kos.mx> <7izixmz15f.wl-jch@pps.univ-paris-diderot.fr> <56670C48.5000807@kos.mx> <566A976B.9010900@kos.mx> <566A9C87.20209@kos.mx> <C5753B93-CB4A-4620-9168-568B7DE0A868@pps.univ-paris-diderot.fr> <566B1622.5030102@kos.mx> <CAKLmikNcRB9OvgoYUjwePfrTkhApzXY3thvwGOqVDVynyKMrog@mail.gmail.com> <87si38s9u7.wl-jch@pps.univ-paris-diderot.fr> <CAKLmikOsg+TrOsv=h=JTMfgmSYvvYAs0nRdzHnb-5zYaOF_J4Q@mail.gmail.com> <566BFFFD.20704@kos.mx> <877fkjstgi.wl-jch@pps.univ-paris-diderot.fr> <566D569D.20705@kos.mx> <87k2oih2vi.wl-jch@pps.univ-paris-diderot.fr> <566D842C.4010002@kos.mx> <87fuz6gwgu.wl-jch@pps.univ-paris-diderot.fr> <12B9F58B-E806-48CC-BBBB-BA19BACC3406@pps.univ-paris-diderot.fr> <DC2F9C30-7406-4754-99CB-166EDC82F65A@pps.univ-paris-diderot.fr> <87wpsgkflk.wl-jch@pps.univ-paris-diderot.fr> <CAA93jw54JK-HqLt4MW=AGMEk=+vuMzvyMyT3=x9+q9nagEqMGQ@mail.gmail.com> <87r3ioke6t.wl-jch@pps.univ-paris-diderot.fr> <CAA93jw7+1SLumq2Ry88C=udF9dJTfW1f8KvJgyMn-8QvJxr_Lg@mail.gmail.com> <CAGnRvuqDsnaOCwmEQXwro7asjf-q1z66T2q-k56=+XEZjPtdoA@mail.gmail.com> <CAA93jw4aeVwK3aoN3Omp+ASqAPDujXf9mehx9BvJ2r=ec=hqxg@mail.gmail.com> <CAA93jw6FpfBpmszHBMVFgrEmdA-trDL5AjyW9ujXTiPda-ie7A@mail.gmail.com> <87twni49ag.wl-jch@pps.univ-paris-diderot.fr>
Date: Thu, 17 Dec 2015 00:42:45 +0100
Message-ID: <CAKLmikOai63+W3FWXGfZmxZ7Xh33N3-Sce23AC9uc5iLEuexYA@mail.gmail.com>
From: Mitar <mmitar@gmail.com>
To: Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <http://mailarchive.ietf.org/arch/msg/homenet/xrobXLKHQAjA6HnQChX9INOX6Xs>
Cc: homenet@ietf.org, Mikael Abrahamsson <swmike@swm.pp.se>, Dave Taht <dave.taht@gmail.com>, "babel-users@lists.alioth.debian.org" <babel-users@lists.alioth.debian.org>
Subject: Re: [homenet] [Babel-users] Detecting bridges
X-BeenThere: homenet@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: IETF Homenet WG mailing list <homenet.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/homenet>, <mailto:homenet-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/homenet/>
List-Post: <mailto:homenet@ietf.org>
List-Help: <mailto:homenet-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/homenet>, <mailto:homenet-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Dec 2015 23:42:48 -0000

Hi!

On Wed, Dec 16, 2015 at 6:01 PM, Juliusz Chroboczek
<jch@pps.univ-paris-diderot.fr> wrote:
>  3. find a way to make babeld less sensitive to links flapping in
>     non-redundant networks (it already behaves well when the flapping link
>     is redundant, but in a non-redundant topology it advertises every link
>     flap across the routing domain).

What about detecting that an ethernet link is flapping and in that
case it turns on link-quality measurement?

Because I think it is pretty uncommon for ethernet link to be coming
up and down. The main reason why Babel does not use link quality on
the ethernet link is that, arguably, failures on ethernet often means
a permanent failure and it is good to detect this quick. But if the
link is coming back soon afterwards and then again down and so on,
Babel should decide to instead go for packet loss? I think that would
be the best default.


Mitar

-- 
http://mitar.tnode.com/
https://twitter.com/mitar_m

v2.23.0 | Report a Bug | By Email