IETF Logo Mail Archive

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 18:24 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 CE5023A1271 for <idr@ietfa.amsl.com>; Sat, 12 Dec 2020 10:24:29 -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 EF0a8qwaKvRE for <idr@ietfa.amsl.com>; Sat, 12 Dec 2020 10:24:28 -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 A351A3A1270 for <idr@ietf.org>; Sat, 12 Dec 2020 10:24:28 -0800 (PST)
Received: from [IPv6:2607:fb90:891e:3c58:1d1:4821:6723:dc11] (unknown [IPv6:2607:fb90:891e:3c58:1d1:4821:6723:dc11]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by puck.nether.net (Postfix) with ESMTPSA id 0FCA3540166; Sat, 12 Dec 2020 13:24:27 -0500 (EST)
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (1.0)
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <X9T1vCF2mFsuymqm@bench.sobornost.net>
Date: Sat, 12 Dec 2020 13:24:25 -0500
Cc: John Scudder <jgs=40juniper.net@dmarc.ietf.org>, idr@ietf.org
Message-Id: <DBEC192C-FB3A-4110-9A54-96EF12E69DF1@puck.nether.net>
References: <X9T1vCF2mFsuymqm@bench.sobornost.net>
To: Job Snijders <job@sobornost.net>
X-Mailer: iPhone Mail (18B92)
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/A60O_R38yc-cZYRFBsvHMV82W5E>
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 18:24:30 -0000

> On Dec 12, 2020, at 11:54 AM, Job Snijders <job@sobornost.net> wrote:
> 
> Sessions with broken peers are not torn down, which prevents much
> needed WITHDRAW messages from being generated.

Yeah but is this a protocol issue (BGP) or a transport implementation issue, or just a BGP implementation issue? We have mostly stopped using XR for a variety of issues and I'm happy to not be dealing with the transport bugs in 2020. I hope they clean up that stack soon, but given how long it's been I kinda a doubt it. 

I'm also sure the bugs aren't limited to a single vendor. Everyone's transport implementation will be different.

v2.23.0 | Report a Bug | By Email