From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-32-ewr.dyndns.com (mxout-178-ewr.mailhop.org [216.146.33.178]) by lists.bufferbloat.net (Postfix) with ESMTP id 724E22E03D8 for ; Tue, 1 Feb 2011 09:33:16 -0800 (PST) Received: from scan-32-ewr.mailhop.org (scan-32-ewr.local [10.0.141.238]) by mail-32-ewr.dyndns.com (Postfix) with ESMTP id D08AE6F9732 for ; Tue, 1 Feb 2011 17:33:15 +0000 (UTC) X-Spam-Score: 0.0 () X-Mail-Handler: MailHop by DynDNS X-Originating-IP: 76.96.27.227 Received: from qmta12.emeryville.ca.mail.comcast.net (qmta12.emeryville.ca.mail.comcast.net [76.96.27.227]) by mail-32-ewr.dyndns.com (Postfix) with ESMTP id 07C9B6F871A for ; Tue, 1 Feb 2011 17:33:08 +0000 (UTC) Received: from omta07.emeryville.ca.mail.comcast.net ([76.96.30.59]) by qmta12.emeryville.ca.mail.comcast.net with comcast id 2hWB1g0041GXsucAChZ804; Tue, 01 Feb 2011 17:33:08 +0000 Received: from [192.168.1.119] ([98.229.99.32]) by omta07.emeryville.ca.mail.comcast.net with comcast id 2hZ51g00H0hvpMe8UhZ7cR; Tue, 01 Feb 2011 17:33:08 +0000 Message-ID: <4D4843D1.2040202@freedesktop.org> Date: Tue, 01 Feb 2011 12:33:05 -0500 From: Jim Gettys Organization: Bell Labs User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101208 Lightning/1.0b2 Thunderbird/3.1.7 MIME-Version: 1.0 To: bloat@lists.bufferbloat.net References: <4D483E84.6060501@csail.mit.edu> In-Reply-To: <4D483E84.6060501@csail.mit.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] Wireless router configuration X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Feb 2011 17:33:16 -0000 On 02/01/2011 12:10 PM, Seth Teller wrote: > > Hello bloat fighters, > > Jim G. wrote me off-list: > > "[Y]ou can't adjust the cable modem; you can use your router > (maybe) to evade the buffers there, by adjusting bandwidth > shaping to keep the buffers from filling. That's what I've > done: my latencies are now about 10-20ms to MIT, even under load." > > Can someone state more specifically what should be adjusted on > my wireless router? (It's a Netgear Wireless-N 150 WNR1000v2.) > > Basic instructions are here: http://gettys.wordpress.com/2010/12/08/bufferbloat-mitigations/ We should move that page over into the bufferbloat.net wiki, and start specific instructions for different routers linked from it. In short, you are looking in the router for something called QOS or bandwidth shaping, that allow you to set the upstream and downstream bandwidth. By limiting the bandwidth to less than what the ISP has provisioned, you can prevent the bloated buffers from filling. Since you have an N router, make sure your laptop is similarly equipped, and if you ensure you have enough bandwidth, you'll then not have other problems in your laptop or in the router around the 802.11 link. How to attack those problems is found in: http://gettys.wordpress.com/2010/12/13/mitigations-and-solutions-of-bufferbloat-in-home-routers-and-operating-systems/ I believe Dave has converted both pages; I'm not sure they are linked into the wiki yet. - Jim