From owner-freebsd-net Fri Sep 20 19:30:49 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 03AEF37B401 for ; Fri, 20 Sep 2002 19:30:48 -0700 (PDT) Received: from tp.databus.com (p70-227.acedsl.com [66.114.70.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id 657C843E77 for ; Fri, 20 Sep 2002 19:30:47 -0700 (PDT) (envelope-from barney@tp.databus.com) Received: from tp.databus.com (localhost.databus.com [127.0.0.1]) by tp.databus.com (8.12.6/8.12.6) with ESMTP id g8L2Uhxr091309; Fri, 20 Sep 2002 22:30:43 -0400 (EDT) (envelope-from barney@tp.databus.com) Received: (from barney@localhost) by tp.databus.com (8.12.6/8.12.6/Submit) id g8L2UhRb091308; Fri, 20 Sep 2002 22:30:43 -0400 (EDT) (envelope-from barney) Date: Fri, 20 Sep 2002 22:30:43 -0400 From: Barney Wolff To: Julian Elischer Cc: net@FreeBSD.ORG Subject: Re: Tcp question. Message-ID: <20020921023043.GA90973@tp.databus.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4i 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 I think you need to separate out tcp behavior from ssh behavior. A & C are clearly not the same tcp/ssh implementation, and I'm not even sure B is consistent between the two runs - for example, B's window size is different, as is the amount of data it sends before setting the P bit. With ssh doing compression & encryption, cpu power becomes visible at lan speeds. The 1380 mss from C may also indicate extra proto layers we're not seeing. And are you sure there's not a 10 mbit link somewhere between B and C? On Fri, Sep 20, 2002 at 05:53:49PM -0700, Julian Elischer wrote: > > OK so I have 3 machines: > > > A------router--------B-------router--------C > > > if I send data from B to A I see 7MB/sec. > if I send data from B to C I see 700KB/sec -- Barney Wolff I'm available by contract or FT: http://www.databus.com/bwresume.pdf To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message