From owner-freebsd-net@FreeBSD.ORG Thu Apr 22 07:30:47 2004 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 831C016A4CE for ; Thu, 22 Apr 2004 07:30:47 -0700 (PDT) Received: from mailtoaster1.pipeline.ch (mailtoaster1.pipeline.ch [62.48.0.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id EFC8543D48 for ; Thu, 22 Apr 2004 07:30:46 -0700 (PDT) (envelope-from andre@freebsd.org) Received: (qmail 76191 invoked from network); 22 Apr 2004 14:30:46 -0000 Received: from unknown (HELO freebsd.org) ([62.48.0.53]) (envelope-sender ) by mailtoaster1.pipeline.ch (qmail-ldap-1.03) with SMTP for ; 22 Apr 2004 14:30:46 -0000 Message-ID: <4087D715.AD1C0F51@freebsd.org> Date: Thu, 22 Apr 2004 16:30:45 +0200 From: Andre Oppermann X-Mailer: Mozilla 4.76 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: Heinz Knocke References: <003301c42875$ccd62f10$df5561d9@ALFA> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: net@freebsd.org Subject: Re: simulating an LFN over 1Gb LAN Ethernet? 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: Thu, 22 Apr 2004 14:30:47 -0000 Heinz Knocke wrote: > > Hi! > > I'd like to simulate an LFN over LAN - my idea is to install testing software > on 2 hosts, traffic between them would be routed by the 3rd one - a FreeBSD > based router. To simulate long RTT the router would have to delay packet > forwarding in at least one direction - does anyone know how to do it? Is > it at all possible withou some changes in kernel source code? yes, do man dummynet(4), ipfw(8). -- Andre