From owner-freebsd-questions@FreeBSD.ORG Tue Dec 12 05:15:49 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EA97116A403 for ; Tue, 12 Dec 2006 05:15:49 +0000 (UTC) (envelope-from mike@tropo.org) Received: from webmail.dogbark.com (webmail.dogbark.com [208.65.30.92]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0093643CAA for ; Tue, 12 Dec 2006 05:14:28 +0000 (GMT) (envelope-from mike@tropo.org) Received: from webmail.dogbark.com (webmail.dogbark.com [208.65.30.92]) by webmail.dogbark.com (Postfix) with ESMTP id A08D51203A6F for ; Mon, 11 Dec 2006 23:15:48 -0600 (CST) Received: from 69.73.127.132 (SquirrelMail authenticated user w4lna) by webmail.dogbark.com with HTTP; Mon, 11 Dec 2006 23:15:48 -0600 (CST) Message-ID: <60158.69.73.127.132.1165900548.squirrel@webmail.dogbark.com> Date: Mon, 11 Dec 2006 23:15:48 -0600 (CST) From: "Mike Murphree" To: freebsd-questions@freebsd.org User-Agent: SquirrelMail/1.4.4 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal Subject: Dummynet fragmenting packets X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Dec 2006 05:15:50 -0000 Having an issue on a 5.3 system using ipfw and dummynet to create a bandwidth limited and large latency pipe for a mpeg video stream. If I pass the packets between the two NICs without routing through a dummynet pipe, it's fine. If I route it through a pipe, it's fragmenting each packet (client requested 1468 byte packets) into two packets, the second packet with an offset of 1440 bytes. Does anyone have any idea why it's doing this, and have a solution to this problem? Thanks, Mike (please cc directly)