From owner-freebsd-questions Tue Aug 20 14: 8:29 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F3D0E37B400 for ; Tue, 20 Aug 2002 14:08:25 -0700 (PDT) Received: from tninet.se (lennier.tninet.se [195.100.94.105]) by mx1.FreeBSD.org (Postfix) with ESMTP id 54E9D43E6E for ; Tue, 20 Aug 2002 14:08:24 -0700 (PDT) (envelope-from tdv94ped@cs.umu.se) Received: from cs.umu.se (h198n1c1o1023.bredband.skanova.com [213.64.164.198]) by lennier.tninet.se (BMR ErlangTM/OTP 3.0) with ESMTP id 474958.877699.1029.0s10099077lennier ; Tue, 20 Aug 2002 23:08:19 +0200 Message-ID: <3D62AFBC.E065722E@cs.umu.se> Date: Tue, 20 Aug 2002 23:08:12 +0200 From: Paul Everlund X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U) X-Accept-Language: sv,en MIME-Version: 1.0 To: trevarthan@wingnet.net Cc: freebsd-questions@FreeBSD.ORG Subject: Re: MTU discovery References: <200208201616.53857.trevarthan@wingnet.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Matthias Trevarthan wrote: > > Howdy list, > > How might I discover the MTU from my location to some arbitrary > location on the internet? > > Thanks! > > Matthias Trevarthan I have not very much knowledge on this particualr subject, but I'll give it a try. When finding the MTU I guess you will not always get the MTU size at the destination, but the smallest MTU on the path to the desti- nation. If doing ping to a destination, specifying the packetsize, this should probably determine the smallest MTU on the path, by trial and error. There are probably some applications doing this auto- matically, but I don't know of any. I presume you have already searched Google for MTU discovery? Best regards, Paul To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message