IETF Logo Mail Archive

Re: [Lsr] Prefix Unreachable Announcement Use Cases

Gyan Mishra <hayabusagsm@gmail.com> Tue, 17 November 2020 08:01 UTC

Return-Path: <hayabusagsm@gmail.com>
X-Original-To: lsr@ietfa.amsl.com
Delivered-To: lsr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CC0263A00C4 for <lsr@ietfa.amsl.com>; Tue, 17 Nov 2020 00:01:24 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.087
X-Spam-Level:
X-Spam-Status: No, score=-2.087 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_REMOTE_IMAGE=0.01, URIBL_BLOCKED=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 J4AISnvZnw7c for <lsr@ietfa.amsl.com>; Tue, 17 Nov 2020 00:01:23 -0800 (PST)
Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) (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 31C9F3A0061 for <lsr@ietf.org>; Tue, 17 Nov 2020 00:01:07 -0800 (PST)
Received: by mail-pf1-x429.google.com with SMTP id t8so491847pfg.8 for <lsr@ietf.org>; Tue, 17 Nov 2020 00:01:07 -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=kEC4lcRl6vk9WWJ0pqMVrL6Jy3xUlJMh+FcP1SnQkIs=; b=FbZqbJT+H9XfZQH7nhUXO7h1qK2Q0RE4z0b+epWyOwZkP0FYTrLLt7pdl0H0yLbg4Q 8HvdBySddFrtd3aY0ECEnxP12AAuhM8gStqJlNQb4T0nLKE+6y+BtOlXwmFsIR1615yw oArJPzCuXxHImN0phdnfgBfOKirk7St1hotjJSs+YhIsP3rKytEgxlNc6Zs5Hxq58ZTX weiNQ420aiR77HxsVe5KMf9W4At1E0oxPT18+jH4a5bpy9icQp+7r2qHzyTqen0mZZLr 8HMMnz9qIsm3JjZnTt9fzdjmga2C+wf2wSD936waUqh7Lm1YzfdweD8M43aVI6/A20do FEag==
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=kEC4lcRl6vk9WWJ0pqMVrL6Jy3xUlJMh+FcP1SnQkIs=; b=CuBQGDUa/R0nqGiUYikj3m+ThL5gKnq7DxB4iBqX86VKXaTe+LT2jTgulmUdPLra4y v2QV3M63HG0zyKAnzLeM9xlwIe73Cbm82/BES+pU4zq9ZA1MVYRiv4xfyVnD2Z3+IrII LQsDIbgldiNo1arwu2fN0xsMwS3JKOVt1Pt0DsyAdKQNiI5fs4EgV37RMLH6crK1jCv8 Xegwz65i4Qsjdsly4/Hd/mVQq78zBgR9xg9lppjwTxwiIgXK/W2wYKRRheXK5k9xHPv2 ga9w98Ht1zpmqLO/7m5cegjYZVBIixF6YgCDdl4BeAJhg/4hAMrThsYFFtHwPBh+59XJ rDXQ==
X-Gm-Message-State: AOAM533l+k4YRTjrZ3AHwxWuPrPnG6xQidSl2FCoV47A1L0yrBJqHvIj jqY14nSsNfHTZop0Jx1mw8R4iYzb2Vt3oFIeCWY=
X-Google-Smtp-Source: ABdhPJxaVpvK7U+CWduRjE+EAv+u8wT+IGubJe0/sPeo/anegG+JtLpUZe+ifAvClrpnDnR32uT3pKxZJ78ILWGIACM=
X-Received: by 2002:a62:ee06:0:b029:164:20d:183b with SMTP id e6-20020a62ee060000b0290164020d183bmr17701995pfi.4.1605600066590; Tue, 17 Nov 2020 00:01:06 -0800 (PST)
MIME-Version: 1.0
References: <CAOj+MMEREV+TCwNiptdVj--HjD5nJV8zOiUJ5THcsomWCa1jJA@mail.gmail.com> <B0A6A569-30F7-4751-9F3B-C65BD23D39F3@gmail.com> <CAOj+MMEYnHeuNnNy-yDuxywMLe+yHv3QfXYqtqEgom7RbTO6Sg@mail.gmail.com> <020d01d6bbc5$9769e7e0$c63db7a0$@tsinghua.org.cn> <CAOj+MMH7zRaXNJTRC0ua7ohasUpo0MmeqgzcU9BdpcD7wD+Yrg@mail.gmail.com> <ACA61115-35A0-46A5-A88D-38ED85BF80B3@cisco.com>
In-Reply-To: <ACA61115-35A0-46A5-A88D-38ED85BF80B3@cisco.com>
From: Gyan Mishra <hayabusagsm@gmail.com>
Date: Tue, 17 Nov 2020 02:54:28 -0500
Message-ID: <CABNhwV2MSAdEbk5ms=X3YHzes1aC0vjxySji+bswHQ0VgBtM5w@mail.gmail.com>
To: "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>
Cc: Robert Raszuk <robert@raszuk.net>, Aijun Wang <wangaijun@tsinghua.org.cn>, lsr <lsr@ietf.org>, Jeff Tantsura <jefftant.ietf@gmail.com>
Content-Type: multipart/alternative; boundary="0000000000009edc9405b448e58d"
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/lJwMAlpKfDcN_GKFMFTvv41Hmvg>
Subject: Re: [Lsr] Prefix Unreachable Announcement Use Cases
X-BeenThere: lsr@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Link State Routing Working Group <lsr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/lsr>, <mailto:lsr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/lsr/>
List-Post: <mailto:lsr@ietf.org>
List-Help: <mailto:lsr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/lsr>, <mailto:lsr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 17 Nov 2020 08:01:25 -0000

Thanks Acee for the feedback.

We will add more detail to the use cases.

Gyan

On Mon, Nov 16, 2020 at 3:45 AM Acee Lindem (acee) <acee=
40cisco.com@dmarc.ietf.org> wrote:

> When the PUA use cases were presented today in the LSR meeting, I made the
> comment that the RIB interactions for each use case would be different and
> needed to be specified.
>
> Thanks,
>
> Acee
>
>
>
>
>
> *From: *Robert Raszuk <robert@raszuk.net>
> *Date: *Monday, November 16, 2020 at 3:25 AM
> *To: *Aijun Wang <wangaijun@tsinghua.org.cn>
> *Cc: *Jeff Tantsura <jefftant.ietf@gmail.com>, lsr <lsr@ietf.org>, Acee
> Lindem <acee@cisco.com>
> *Subject: *Re: [Lsr] Prefix Unreachable Announcement Use Cases
>
>
>
> I was not bringing RIFT's negative routies example as something inherently
> negative. I was just pointing it out to illustrate that today's data plane
> lookup does not really support "if does not match" checks.
>
> *[WAJ] In data plane, the device do still the “match” check, not “does not
> match” check.  When the router receives the PUA information, it will
> install one black hole route for a short time.*
>
>
>
> So your idea is that you install route for unreachable prefix to /dev/null
> ?
>
>
>
> And how would that help connectivity restoration ?
>
>
>
> Moreover it seems that it will just also prevent any local protection to
> locally bypass the failed destination.
>
>
>
> Bottom line is that I agree with one problem statement. However IMHO
> described actions upon reception of PUA are questionable at best.
>
>
>
> Cheers,
> R.
> _______________________________________________
> Lsr mailing list
> Lsr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsr
>


-- 

<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *



*M 301 502-134713101 Columbia Pike *Silver Spring, MD

v2.23.0 | Report a Bug | By Email