From owner-freebsd-net Fri Nov 1 11: 5:39 2002 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 1B71437B401 for ; Fri, 1 Nov 2002 11:05:38 -0800 (PST) Received: from mail.sandvine.com (sandvine.com [199.243.201.138]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4F93943E6E for ; Fri, 1 Nov 2002 11:05:37 -0800 (PST) (envelope-from don@sandvine.com) Received: by mail.sandvine.com with Internet Mail Service (5.5.2653.19) id <42S9VST7>; Fri, 1 Nov 2002 14:05:35 -0500 Message-ID: From: Don Bowman To: "'Fran.Lawas-Grodek@grc.nasa.gov'" , Don Bowman Cc: Luigi Rizzo , Cindy.Tran@grc.nasa.gov, freebsd-net@FreeBSD.ORG, Mark.Allman@grc.nasa.gov Subject: RE: Problem in High Speed and Long Delay with FreeBSD Date: Fri, 1 Nov 2002 14:05:34 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > From: Fran Lawas-Grodek [mailto:Fran.Lawas-Grodek@grc.nasa.gov] > Well... our development code that we are to ultimately test was > developed on 4.1, thus we really need to try to stick with 4.1. > It does not look like either of the above parameters are available > until 4.7. No worries. Have you checked that both sides are negotiating SACK? And both sides are negotiating a window scale option sufficiently large? (sounds like you need a window scale option of at least 5 bits?) And the socket-buffer to ttcp is actually being set as large as you think? (perhaps run 'ktrace' or 'truss' on ttcp and look for an error on the setsockopt). http://www.rfc-editor.org/rfc/rfc1323.txt has some other suggestions I think, but I'm guessing you've already gone over it. --don (don@sandvine.com www.sandvine.com) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message