IETF Logo Mail Archive

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

Jeffrey Haas <jhaas@pfrc.org> Fri, 18 December 2020 12:44 UTC

Return-Path: <jhaas@pfrc.org>
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 24F003A0332 for <idr@ietfa.amsl.com>; Fri, 18 Dec 2020 04:44:35 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, 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 eYxN91aeV9zS for <idr@ietfa.amsl.com>; Fri, 18 Dec 2020 04:44:33 -0800 (PST)
Received: from slice.pfrc.org (slice.pfrc.org [67.207.130.108]) by ietfa.amsl.com (Postfix) with ESMTP id 6DCD23A0140 for <idr@ietf.org>; Fri, 18 Dec 2020 04:44:33 -0800 (PST)
Received: from dresden.attlocal.net (99-59-193-67.lightspeed.livnmi.sbcglobal.net [99.59.193.67]) by slice.pfrc.org (Postfix) with ESMTPSA id 10EAC1E354; Fri, 18 Dec 2020 08:02:00 -0500 (EST)
Content-Type: multipart/alternative; boundary="Apple-Mail=_4AC1163E-A0E7-49BF-9AEF-C4BFE315E32E"
Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\))
From: Jeffrey Haas <jhaas@pfrc.org>
In-Reply-To: <CANJ8pZ-WMDotkQvhN-NuP7ivZkPRR-9S2KJSar=6463U0VKkow@mail.gmail.com>
Date: Fri, 18 Dec 2020 07:44:33 -0500
Cc: "Jakob Heitz (jheitz)" <jheitz@cisco.com>, "idr@ietf. org" <idr@ietf.org>
Message-Id: <EFC56A31-1276-4DAB-9526-9C2F24814D2C@pfrc.org>
References: <CANJ8pZ-WMDotkQvhN-NuP7ivZkPRR-9S2KJSar=6463U0VKkow@mail.gmail.com>
To: Enke Chen <enchen@paloaltonetworks.com>
X-Mailer: Apple Mail (2.3608.120.23.2.4)
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/8Iai4OZqpvlmg_iFa2RLcFztuo8>
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: Fri, 18 Dec 2020 12:44:35 -0000

Enke,


> On Dec 17, 2020, at 4:02 PM, Enke Chen <enchen@paloaltonetworks.com> wrote:
> 
> If one is paranoid that the BGP keepalive may not be generated locally, then use the TCP_KEEPAVLIE option together with the TCP_USER_TIMEROUT option. That would be more robust.

You're making the peculiar assumption that in broken situations that packets are getting somewhere.  This is Brian's point.

-- Jeff

v2.23.0 | Report a Bug | By Email