Re: [Idr] TCP & BGP: Some don't send terminate BGP when holdtimer expired, because TCP recv window is 0

Jared Mauch <jared@puck.nether.net> Sat, 12 December 2020 19:03 UTC

Return-Path: <jared@puck.nether.net>
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 5863F3A1357 for <idr@ietfa.amsl.com>; Sat, 12 Dec 2020 11:03:51 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.92
X-Spam-Level:
X-Spam-Status: No, score=-1.92 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
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 rhODWJbY6hlx for <idr@ietfa.amsl.com>; Sat, 12 Dec 2020 11:03:50 -0800 (PST)
Received: from puck.nether.net (puck.nether.net [204.42.254.5]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 700D73A1355 for <idr@ietf.org>; Sat, 12 Dec 2020 11:03:50 -0800 (PST)
Received: from [10.0.0.129] (unknown [23.138.112.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by puck.nether.net (Postfix) with ESMTPSA id D8FC7540165; Sat, 12 Dec 2020 14:03:48 -0500 (EST)
Content-Type: text/plain; charset="utf-8"
Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.20.0.2.21\))
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <CANJ8pZ_63ar_G9fzgMG4jacbVF24h-oEmdqMSaZOiT+G7-qp0g@mail.gmail.com>
Date: Sat, 12 Dec 2020 14:03:48 -0500
Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "idr@ietf.org" <idr@ietf.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <3A6149E9-A157-4A0B-820B-F9A8C5B9E5F0@puck.nether.net>
References: <CANJ8pZ_4OasVWQ+Z7UddOXF85RgMOQGbZni9Zpivy-wa0AXj3Q@mail.gmail.com> <BYAPR11MB32077A4C76A2D5B569837698C0C90@BYAPR11MB3207.namprd11.prod.outlook.com> <CANJ8pZ_63ar_G9fzgMG4jacbVF24h-oEmdqMSaZOiT+G7-qp0g@mail.gmail.com>
To: Enke Chen <enchen@paloaltonetworks.com>
X-Mailer: Apple Mail (2.3654.20.0.2.21)
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/_rDI2nRwOKF9NNXzBEC2_4aAqeA>
Subject: Re: [Idr] TCP & BGP: Some don't send terminate BGP when holdtimer expired, because TCP recv window is 0
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: Sat, 12 Dec 2020 19:03:51 -0000


> On Dec 12, 2020, at 1:52 PM, Enke Chen <enchen@paloaltonetworks.com> wrote:
> 
> Hi, Jakob:
> 
> It's about recovery from corner cases that occur rarely than other "holdtime expiration" events.
> 
> Keep it simple and robust.


If a vendor ships an unsafe transport protocol, it’s going to have all these bad behaviors.

I’m wondering how bad this is for non-XR people vs XR people where it’s a known issue.

- Jared