Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt

Robert Raszuk <robert@raszuk.net> Tue, 14 March 2017 22:46 UTC

Return-Path: <rraszuk@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 B0212131619 for <idr@ietfa.amsl.com>; Tue, 14 Mar 2017 15:46:52 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.501
X-Spam-Level:
X-Spam-Status: No, score=-0.501 tagged_above=-999 required=5 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.197, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham 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 5SFeS3a6pber for <idr@ietfa.amsl.com>; Tue, 14 Mar 2017 15:46:51 -0700 (PDT)
Received: from mail-qt0-x235.google.com (mail-qt0-x235.google.com [IPv6:2607:f8b0:400d:c0d::235]) (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 45A7313161E for <idr@ietf.org>; Tue, 14 Mar 2017 15:46:47 -0700 (PDT)
Received: by mail-qt0-x235.google.com with SMTP id i34so365079qtc.0 for <idr@ietf.org>; Tue, 14 Mar 2017 15:46:47 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=VgcEtPDkCArrNq3UniTeKLRc5wJ/qDl2E/WxneDUxuY=; b=rhau9npPyqlThJEKRlt2ZyRqcbf0MVfP3Y2oVctjjay/8hu0aBkXi7QfVYQhHsA4Kj YrlGGpo8hXuYlVg9FPiGx3t3OrZjeL2vumRaQXgzC2phKVZJ8Wxudag1rijAjwyepV7Z H5PEZhQ3GvqcdEzVy9ya8CDuchawVRPqVT3QJhBAdsfTRjplXwVm0x6Bnj0RIDXE/7DE 31s0VjuEWV7SPleYKtEmemfcfRcOM0A+8FpLYGjuwaZtGCusN/uQm8MY0oX4C3B8m3xw TOcaZRHg8BtbvJmKqPXmYwQCCDka7eD1w9nPOPlTexF4cdSPimlrqcDhV47Rpcd+W5Od jxmQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=VgcEtPDkCArrNq3UniTeKLRc5wJ/qDl2E/WxneDUxuY=; b=KCCTt94G/xMh4UPOD0V4Dg6zi8TGvqQocxJb1w4g8BRmoFIgNjU3OzStJheBHWK842 6NDeHn5P6ngjXDV0MH2ugDpzHPDm1B5bQJT1cw/+PAKsZcsx1+pIU61XQcQWYAlSFMa5 /FRTBbkYs6TqJp4LkKJ6quoeyAy3bwvuBgfOWX6N0EpJM5bs5t5WqQD5QrQ/yZD/iDGK DQMISPqJR+zXlSjdwgN+rhZeducfmCBn5jBxcaWOVSKWyfH+ckBgpOMWYp0z/+f8hME5 BmaKhEnbp8wKGXXoefDdYsuSuJR5GYMAIktAhI6+O1yAlBmgLZOtigINWw5DIz1lGvof TVUA==
X-Gm-Message-State: AFeK/H1YWFCgqYTa/iVh95oHua2iigkEocJR/q0ZXMECyTKvRm9Yu42qSe8ctZPLc6OjBd2NzyUeQ6XDivep/A==
X-Received: by 10.200.53.209 with SMTP id l17mr44405qtb.281.1489531606473; Tue, 14 Mar 2017 15:46:46 -0700 (PDT)
MIME-Version: 1.0
Sender: rraszuk@gmail.com
Received: by 10.140.42.181 with HTTP; Tue, 14 Mar 2017 15:46:45 -0700 (PDT)
In-Reply-To: <20170314223333.bw3caxfn34y6zlb7@Vurt.local>
References: <CA+b+ERn5o-i-6shdzj_afa8Z1yQO3Ep6HmB=Fv4StSW_ge95Ew@mail.gmail.com> <CA+b+ERkBeBoz0Le4wgqZK1X76=_HKOEUYTWYBd_xnjYoaJgrsw@mail.gmail.com> <CA+b+ERnBL9Q3ep1JrC9HQp3B3AYmiQ8ctTssK1g4L_ueTTRaMQ@mail.gmail.com> <CA+b+ER=cZiBfWj4=+uKeqsWwypGFz3p+Tvx8Q2dD3hFFXSC4=w@mail.gmail.com> <CA+b+ER=f-S118JtY--n-B0P+CB0yvy_rw3JaJpWw02n7prQ=Ww@mail.gmail.com> <20170314204212.GD12864@pfrc.org> <815723FC-B143-4410-B0FF-D9FB4F827862@cisco.com> <20170314213607.GH12864@pfrc.org> <20170314214832.s3k37p27y7xfpfsv@Vurt.local> <CA+b+ERmLDNzF=TofW=w1OwUzeLGUc-3muMckHTH6Rs=c8rc5bQ@mail.gmail.com> <20170314223333.bw3caxfn34y6zlb7@Vurt.local>
From: Robert Raszuk <robert@raszuk.net>
Date: Tue, 14 Mar 2017 23:46:45 +0100
X-Google-Sender-Auth: c81WUl8bOBHKyxDAXNqD4Uz1ljo
Message-ID: <CA+b+ERmMOyqb8HFtNXyDr8e+MNxA7EWmJFukUNgSjAU+69f5CA@mail.gmail.com>
To: Job Snijders <job@instituut.net>
Cc: Jeffrey Haas <jhaas@pfrc.org>, "Rajiv Asati (rajiva)" <rajiva@cisco.com>, idr wg <idr@ietf.org>
Content-Type: multipart/alternative; boundary=001a1143c7b0492ba0054ab89a4d
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/dxX0WhxXJHWAGNzp6IJvdTgSgnQ>
Subject: Re: [Idr] I-D Action: draft-ietf-idr-rs-bfd-02.txt
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.22
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: Tue, 14 Mar 2017 22:46:53 -0000

​Job,​


> I believe it is a common practise amongst IXP Route Server operators to
> let the two (or more) route servers operate entirely _independent_ from
> each other, e.g. with no BGP sessions amongest the RS's themselves.
>

​Since clients will likely eBGP peer to both route servers and send pretty
much the same UPDATES to both you do not need any session between RSes to
choose best one one and second best on the other towards the clients :) In
fact in RS case tie break may be rtr_id :)  Very easy to set such
preference in cli.

= = =

All,

And just for the record here the idea for NH SAFI has been proposed by Ilya
& myself in 2012 ...

https://tools.ietf.org/html/draft-ietf-idr-bgp-nh-cost-00

Best,
R.

​