From owner-freebsd-hackers Sat Jan 5 3:22:39 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from scaup.prod.itd.earthlink.net (scaup.mail.pas.earthlink.net [207.217.120.49]) by hub.freebsd.org (Postfix) with ESMTP id 7084537B416 for ; Sat, 5 Jan 2002 03:22:35 -0800 (PST) Received: from pool0024.cvx22-bradley.dialup.earthlink.net ([209.179.198.24] helo=mindspring.com) by scaup.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16MouG-0003Wp-00; Sat, 05 Jan 2002 03:22:32 -0800 Message-ID: <3C36E1F8.B64468C5@mindspring.com> Date: Sat, 05 Jan 2002 03:22:32 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: "M. Warner Losh" Cc: drwilco@drwilco.net, freebsd-hackers@FreeBSD.ORG Subject: Re: path_mtu_discovery References: <5.1.0.14.0.20020105011402.01d75230@mail.drwilco.net> <20020104.230218.17343558.imp@village.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG "M. Warner Losh" wrote: > In message: <5.1.0.14.0.20020105011402.01d75230@mail.drwilco.net> > "Rogier R. Mulhuijzen" writes: > : Out of curiosity, where do MTUs < ~512 occur? > > Old slip links that used it to reduce latency. I suspect that there > aren't too many of them left in the world. PPPOE over modem links can do this, as well. There are also intentional flow limits set on ATM muxes which implement the "leaky bucket" algorithm (c.v. Tom Ndousse, PhD's work on leaky bucket; I think he's at Arizona in Tucson, right now...). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message