From owner-freebsd-questions Fri Jul 17 08:42:45 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id IAA21382 for freebsd-questions-outgoing; Fri, 17 Jul 1998 08:42:45 -0700 (PDT) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from baldur.biw.com (baldur.biw.com [167.150.15.1]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id IAA21282 for ; Fri, 17 Jul 1998 08:42:27 -0700 (PDT) (envelope-from gswanton@biw.com) Received: (from mail@localhost) by baldur.biw.com (8.6.12/8.6.9) id LAA01187 for ; Fri, 17 Jul 1998 11:42:02 -0400 Received: from biw.com by baldur.biw.com via smap (V1.3) id sma001184; Fri Jul 17 11:41:56 1998 Received: by NT_LPD17_EXCH with Internet Mail Service (5.0.1460.8) id ; Fri, 17 Jul 1998 11:42:23 -0400 Message-ID: <8340CF4C9BFED01188A200A0C969E9971DAA71@NT_LPD17_EXCH> From: "Swanton, George" To: "'freebsd-questions@FreeBSD.ORG'" Subject: simulating WAN latency Date: Fri, 17 Jul 1998 11:42:22 -0400 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hello, Travelling as a stranger in the strange land of WindowsNT I have encountered a problem I'm hoping my faithful friend FreeBSD can help me solve. We have an application demonstrating less than impressive performance over a wide area link. There is a configuration I belive will help but for various reasons am unable to test without undo difficulty. I would like to test the solution locally using a FreeBSD machine to introduce the ~80ms latency of the 512K WAN into a local TCP link. I am writing to request suggestions as to how to procede. I am considering tweaking the system to buffer packets and forward them after a specified delay, or perhaps dropping incoming packets with probability P. A pointer to an existing package or related document would of course be highly desirable. I am not much acquainted with TCP/IP networking internals but am an experienced Unix/C programmer willing to 'dive in and break things'. Any feedback is much appreciated. Thanks gps George P Swanton CSC/BIW-LPD17 (207)-442-3021 gswanton@biw.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message