From owner-freebsd-questions@FreeBSD.ORG Sun Sep 9 02:33:25 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0A3EC16A46C for ; Sun, 9 Sep 2007 02:33:25 +0000 (UTC) (envelope-from joao.barros@gmail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.184]) by mx1.freebsd.org (Postfix) with ESMTP id 7D69513C46C for ; Sun, 9 Sep 2007 02:33:24 +0000 (UTC) (envelope-from joao.barros@gmail.com) Received: by nf-out-0910.google.com with SMTP id k4so607782nfd for ; Sat, 08 Sep 2007 19:33:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=Y2Od9lraA5fyyM3uhpPMDFaYhZUcDhJed0PSbznEBdw=; b=kwDA47M1spkB38NC2ByEDYY7jNO9sROj2BC+kCJmAp+ZIBT2azEQZekIhaRPwSKplPTwJxnDNyFhSKPxxPMCVDhUYjKtuAyIh4LKYNJ3Ea9kKgEUfdy1yA99ixGPqYW0exWG/qHaiY2bCQwu/RXBs71sahkzgTQeSj0sZmO2msQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=HQST8t/c539HuLhao/5/O40R2DvL8VzVvcDmgFvWU3hll7v7a2ytqUyv93+cbB1Z/uda3ijuww6kF+g0j5g7SVi+8u2NGnxSwKDENNflvsLbWDKCUlhf9+1EdvLO25M/WUWo40UIe1cZLDsw2k+jmHrBFKxhFVnH9NhnOqdKDJE= Received: by 10.78.170.6 with SMTP id s6mr1243048hue.1189305203050; Sat, 08 Sep 2007 19:33:23 -0700 (PDT) Received: by 10.78.187.16 with HTTP; Sat, 8 Sep 2007 19:33:23 -0700 (PDT) Message-ID: <70e8236f0709081933k5f2352d2y389c6e2bb7599b16@mail.gmail.com> Date: Sun, 9 Sep 2007 03:33:23 +0100 From: "Joao Barros" To: "Ted Mittelstaedt" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <84b68b3d0709081225x4fb929fck38a3265846f7b8ba@mail.gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: ADSL Bandwidth Monitoring X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Sep 2007 02:33:25 -0000 On 9/8/07, Ted Mittelstaedt wrote: > > > > -----Original Message----- > > From: owner-freebsd-questions@freebsd.org > > [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Amitabh Kant > > Sent: Saturday, September 08, 2007 12:25 PM > > To: Bahman M. > > Cc: freebsd-questions@freebsd.org > > Subject: Re: ADSL Bandwidth Monitoring > > > > > > On 9/8/07, Bahman M. wrote: > > > I tested the connection by downloading 2~3 files simultaneously and used > > > 'bmon' as Mel suggested in another reply (thanks to him). As I'd > > > already guessed the RX don't get bigger than 30~40% of the expected > > > bandwidth. I performed the test with some other files and there was no > > > difference. > > > > > > Thanks, > > > > > > Bahman > > > > The bandwidth being advertised by your ISP would be the maximum > > thoughput allowed on your DSL lines with multiple DSL users sharing > > the same bandwidth, something that is generally known as contention > > ratio. > > Rubbish. I work for an ISP and this is nonsense. DSL is not a > shared medium until it gets to the ISP and the ISP should be able > to handle full rate circuits internally. >From the customer to the DSLAM it's a copper pair. If the DSLAM is far from the ISP backbone you have a shared connection. That's where contention is applied. If for example he has 10mbits downstream contracted and there are several "power" users hitting the same DSLAM and the link to the ISP isn't big enough... > He should be able to get max bandwidth from his home system to his > ISP's system. All our customers can. Beyond that, from his ISP to > the rest of the world > that is a different story. But he needs to get the bandwidth correcte > dbetween himself and his ISP first. He should be able to get max bandwidth but not every ISP in the world has link bandwidth allocated for all their customers. Example: you have 100 customers with 10mbits contracted downstream. Think every ISP out there will have a 1Gbps link from the DSLAM to the backbone? Most definitely not. The same happens for mail servers. Do you believe every ISP has enough storage space to hold the advertised email storage space to their total number of customers? Most definitely not. -- Joao Barros