From owner-freebsd-net@FreeBSD.ORG Mon Nov 17 02:46:19 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1DD5816A4CE for ; Mon, 17 Nov 2003 02:46:19 -0800 (PST) Received: from mailtoaster1.pipeline.ch (mailtoaster1.pipeline.ch [62.48.0.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id 03A9A43FE3 for ; Mon, 17 Nov 2003 02:46:18 -0800 (PST) (envelope-from oppermann@pipeline.ch) Received: (qmail 58141 invoked from network); 17 Nov 2003 10:49:16 -0000 Received: from unknown (HELO pipeline.ch) ([62.48.0.53]) (envelope-sender ) by mailtoaster1.pipeline.ch (qmail-ldap-1.03) with SMTP for ; 17 Nov 2003 10:49:16 -0000 Message-ID: <3FB8A6F9.25FF1BF3@pipeline.ch> Date: Mon, 17 Nov 2003 11:46:17 +0100 From: Andre Oppermann X-Mailer: Mozilla 4.76 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: "George V. Neville-Neil" References: <877k1zjv81.wl@jchurch.neville-neil.com.neville-neil.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-net@freebsd.org Subject: Re: Path MTU growth in TCP? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Nov 2003 10:46:19 -0000 "George V. Neville-Neil" wrote: > > Howdy, > > I was wondering if PMTU ever tries to grow the MTU of a > connection after a time? I.e. if the path changes it might > change away from one where the MTU was particularly small. It doesn't try to that in the strict sense. It only starts over again if the cached entry (currently in routing and soon in tcp hostcache) expires. But it only expires when there is not using it for a certain amount of time. -- Andre