Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as-set-confed-set-02.txt
Donatas Abraitis <donatas.abraitis@gmail.com> Sun, 10 November 2019 08:15 UTC
Return-Path: <donatas.abraitis@gmail.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 D6CEC120170 for <idr@ietfa.amsl.com>; Sun, 10 Nov 2019 00:15:56 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.998
X-Spam-Level:
X-Spam-Status: No, score=-1.998 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_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
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 O9xIawUATCoH for <idr@ietfa.amsl.com>; Sun, 10 Nov 2019 00:15:54 -0800 (PST)
Received: from mail-qv1-xf2a.google.com (mail-qv1-xf2a.google.com [IPv6:2607:f8b0:4864:20::f2a]) (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 D115A120059 for <idr@ietf.org>; Sun, 10 Nov 2019 00:15:53 -0800 (PST)
Received: by mail-qv1-xf2a.google.com with SMTP id g12so3775633qvy.12 for <idr@ietf.org>; Sun, 10 Nov 2019 00:15:53 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=KJx+JWpcsOWITftkMdKbRUhQIzPoYxu6mysZw/gkKCs=; b=pL5+HLKAH/GOA3yh8khbxZNcj7sx8VxaUVniLTCmLGjyWb23iu6kvf/rp5LoklqOgI izseMa6mbEU1w8lLL37z636db/uB0dx5wn9vPQYtIIty72c8HZmEFBR9eRMEr6+AXDuG A8uD4jhK1sZs6a998YNKKZgXDCn3EIfh1A0AalLmdTjQtLDt1vcXBoX0MgFaVnrmv9ka vCxDvYLPnpjpHeimV57A35uNvVrZLKnmXu3BbDHwxqBDr2ytjGCl8MxLInwrC++q9Nsa 8IzSae6P/Ll/ZfTJ6ogzPkUxdrH0Y+ybfrdLngD+G9HD82KI5+5EyV0SFKA37PGIMJ9L posg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=KJx+JWpcsOWITftkMdKbRUhQIzPoYxu6mysZw/gkKCs=; b=taJeWqvAJq7hggOQEZXaXw2/R3YH3cx441F3reYpbJygNaYFBgEaB0pLk5PUgHP+QG BpY0EeyGP4OQTsBQmluXM8flKFG+tdwETv3hyufN4hEfYGd5srQwYLxHqMFAwtYyCWBt EUVzEVis8uuBw8ZvSrtt5LyX0an0tBvQSDTYPB4hvIWz5pjOR49SCY0BzPfMLBKCuVZw ELH+4coX+BSTpdZTXVJ+koa+lI2yeZ3RDYewXP3KM2+oyrnHXxweDxzCi/QAWnlvtDDl 0hPHTrvE+5vi+sU2FrEtiicE/4VZ6+M4iED4woCm0a8eJGxP3HxusB4MrJQWFgYupixs RsOA==
X-Gm-Message-State: APjAAAURXqgSHtDc3UKJ5LQttuxN2OSWhEBBeq9RfacaH+emeiJLK1iD Jgyb6hIvaeYO5FPeE0bH2WZbCzMc16Sc8MaddGw=
X-Google-Smtp-Source: APXvYqyoKPp4bCD7IPIKRc5v5vYJZ4MTT+9C/63Lbhnlaq0YJSwZWg16/BqCyCudUmTwhRmrTugRiY5f8GSg7Lfd1uY=
X-Received: by 2002:ad4:458b:: with SMTP id x11mr4766692qvu.7.1573373752648; Sun, 10 Nov 2019 00:15:52 -0800 (PST)
MIME-Version: 1.0
References: <BN6PR09MB1331565B584CB3175FD97CCF84750@BN6PR09MB1331.namprd09.prod.outlook.com>
In-Reply-To: <BN6PR09MB1331565B584CB3175FD97CCF84750@BN6PR09MB1331.namprd09.prod.outlook.com>
From: Donatas Abraitis <donatas.abraitis@gmail.com>
Date: Sun, 10 Nov 2019 10:15:41 +0200
Message-ID: <CAPF+HwX=Hv2T0MTGXW+7EU2GHe-W_eZMB3RmrDeHS-_cd8MkcQ@mail.gmail.com>
To: "Sriram, Kotikalapudi (Fed)" <kotikalapudi.sriram=40nist.gov@dmarc.ietf.org>
Cc: Alejandro Acosta <alejandroacostaalamo@gmail.com>, Sander Steffann <sander@steffann.nl>, IDR <idr@ietf.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/sWr-1zVf6-wqSuArDF64DWh0U_g>
Subject: Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as-set-confed-set-02.txt
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.29
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: Sun, 10 Nov 2019 08:15:57 -0000
Hi folks! we have a standing PR in FRRouting regarding this change too: https://github.com/FRRouting/frr/pull/5305 On Sun, Nov 10, 2019 at 7:01 AM Sriram, Kotikalapudi (Fed) <kotikalapudi.sriram=40nist.gov@dmarc.ietf.org> wrote: > > Alejandro, > Sander, > > [Alejandro] > >>As a comment, we did a small research and > >>these are our findings (hope the table shows ok): > >>.....snip..... > > [Sander] > >Those numbers are very manageable. If we gather a couple > >of volunteers we could personally contact each AS. > > Thanks for the measurement numbers and your comments. > > We had earlier reported similar numbers (totals across all RIR regions) > with many more details: > https://mailarchive.ietf.org/arch/msg/idr/tE8o0HZeLLUEulMkszVBlxqILeU > > The link to our detailed data is here: > https://www.nist.gov/sites/default/files/documents/2019/10/23/detailed-as_set-analysis.txt > > Our numbers and yours are consistent, except that we also showed that > globally there only 21 unique routes (prefixes) with AS_SET that seem meaningful! > The rest of the routes with AS_SET (about 450) seem meaningless; details at the link above. > > Even the 21 will likely do fine if they did not use AS_SET. They can deaggregate and > provide the full AS path or they can aggregate and put in AGGREGATOR and > ATOMIC_AGGREGATE. If you look at this part of our data: > > *** When there is AGGREGATOR without AS_SET *** > # Unique prefixes (with or without AS_SET) : 826535 > # Unique prefixes without AS_SET but with AGGREGATOR: 75698 > % Unique prefixes without AS_SET but with AGGREGATOR: 9.158% > # Unique prefixes with ATOMIC_AGGREGATE: 47258 > # Unique prefixes with AGGREGATOR and ATOMIC_AGGREGATE: 44971 > # Unique prefixes with AGGREGATOR and without ATOMIC_AGGREGATE: 31769 > (the last three lines added newly) > > it seems clear that a very large number of routes/ASes aggregate without AS_SET > and very likely many of them face similar scenario as those with AS_SET > and yet they do not seem to encounter problems (despite not using AS_SET). > I think the main reason is that even if the aggregate is received > via another upstream provider and gets installed in as AS that contributed to the aggregate, > the AS really never uses that aggregate to route data because it has received > the other components (more specifics) of the aggregate from the provider who aggregated. > As Jeff has pointed out, if a more specific gets cut off (due to outage), then looping > in the data plane can occur. > This would typically last only for a short period until recovery happens. > Now a days, the recovery times are fast. And possibly looping of data for a brief period > is not much worse than the data not reaching its destination for that period. > > Sriram > > > > > > > > > > _______________________________________________ > Idr mailing list > Idr@ietf.org > https://www.ietf.org/mailman/listinfo/idr -- Donatas
- [Idr] I-D Action: draft-ietf-idr-deprecate-as-set… internet-drafts
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Job Snijders
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Ondrej Zajicek
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Sriram, Kotikalapudi (Fed)
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Donatas Abraitis
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Sriram, Kotikalapudi (Fed)
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Alejandro Acosta
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Jared Mauch
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Jeffrey Haas
- Re: [Idr] I-D Action: draft-ietf-idr-deprecate-as… Hannachi, Lilia (IntlAssoc)