From owner-freebsd-net Fri Oct 18 12:26:31 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 21E5B37B401 for ; Fri, 18 Oct 2002 12:26:30 -0700 (PDT) Received: from pimout3-ext.prodigy.net (pimout3-ext.prodigy.net [207.115.63.102]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8496743EAC for ; Fri, 18 Oct 2002 12:26:29 -0700 (PDT) (envelope-from kbyanc@posi.net) Received: from gateway.posi.net (adsl-63-201-92-224.dsl.snfc21.pacbell.net [63.201.92.224]) by pimout3-ext.prodigy.net (8.12.3 da nor stuldap/8.12.3) with ESMTP id g9IJQOne512386; Fri, 18 Oct 2002 15:26:25 -0400 Received: from localhost (localhost [127.0.0.1]) by gateway.posi.net (8.12.6/8.12.5) with ESMTP id g9IJQJOQ001849; Fri, 18 Oct 2002 12:26:20 -0700 (PDT) (envelope-from kbyanc@posi.net) Date: Fri, 18 Oct 2002 12:26:19 -0700 (PDT) From: Kelly Yancey To: Luigi Rizzo Cc: Petri Helenius , Lars Eggert , Subject: Re: ENOBUFS In-Reply-To: <20021018114829.Y1611-100000@gateway.posi.net> Message-ID: <20021018122321.G1611-100000@gateway.posi.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII 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 On Fri, 18 Oct 2002, Kelly Yancey wrote: > > You should definitely clarify how fast the smartbits unit is pushing > > out traffic, and whether its speed depends on the measured RTT. > > > > It doesn't sound like the box is that smart. As it was explained to me, the > test setup includes a desired 'load' to put on the wire: it is measured as a > percentage of the wire speed. Since our SmartBit unit only supports > 100base-T and doesn't understand vlans, we have to use 7 separate outbound > ports, each configured for 14.25% load. To the GigE interface, this should > appear as 99.75 megabits of data (including all headers/framing). > Oops. That was actually the explanation of the SmartBits 'desired ILoad' which I didn't quote in the posted numbers. The actual number of packets transmitted is based on RTT. Sorry for the confusion, Kelly -- Kelly Yancey -- kbyanc@{posi.net,FreeBSD.org} "No nation is permitted to live in ignorance with impunity." -- Thomas Jefferson, 1821. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message