From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from tuna.sandelman.ca (unknown [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) by huchra.bufferbloat.net (Postfix) with ESMTP id D213C21F16D for ; Mon, 26 Nov 2012 04:27:08 -0800 (PST) Received: from obiwan.sandelman.ca (unknown [IPv6:2607:f0b0:f:2::247]) by tuna.sandelman.ca (Postfix) with ESMTP id 38DC62016D; Mon, 26 Nov 2012 07:28:51 -0500 (EST) Received: by obiwan.sandelman.ca (Postfix, from userid 179) id AE53563A90; Mon, 26 Nov 2012 07:26:40 -0500 (EST) Received: from obiwan.sandelman.ca (localhost [127.0.0.1]) by obiwan.sandelman.ca (Postfix) with ESMTP id 9887B63A8E; Mon, 26 Nov 2012 07:26:40 -0500 (EST) From: Michael Richardson To: Richard Brown In-Reply-To: <54532012A5393D4E8F57704A4D55237E3CDE473A@CH1PRD0510MB381.namprd05.prod.outlook.com> References: <54532012A5393D4E8F57704A4D55237E3CDE473A@CH1PRD0510MB381.namprd05.prod.outlook.com> X-Mailer: MH-E 8.3; nmh 1.3-dev; XEmacs 21.4 (patch 22) X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0; <'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m Sender: mcr@obiwan.sandelman.ca Cc: "cerowrt-devel@lists.bufferbloat.net" Subject: Re: [Cerowrt-devel] Bufferbloat at upcoming LUG talk X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Nov 2012 12:27:09 -0000 >>>>> "Richard" == Richard Brown writes: Richard> - I can see how the CeroWrt de-bloating algorithms help Richard> protect against bad latency when I'm *uploading* big Richard> files. I'm not sure whether using CeroWrt with its Richard> CoDel/FQ/SFQ/etc. helps when I'm downloading big files, Richard> though. What can I say about this? If the link from the broadband to the laptop is wireless, than it's quite possible that the wireless link experiences bufferbloat. This would be true: - if the laptop is far from the base station the rate could be lower than the broadband download link. (Especially now that cable offers 50Mb/s downlinks...) - if the wireless is bridged to wired, and there are many windows boxes, broadcasting a lot, then the wireless link may be otherwise saturated bad uplink latency will affect TCP ACKs, and can totally ruin your interactive ssh day too. But, in general, either the ISP has to debloat too, or it has to rate limit to below the actual bandwidth. Richard> - I believe the default DNS server in Sugarland is dnsmasq, Richard> not bind. Is DNSSEC enabled by default? Also: there's a Richard> report (Bug #411) that says that DNS is leaking internal Richard> names to the outside world. What's the best advice for Richard> closing this? ("list notinterface 'ge00'" is one Richard> recommendation…) (In general, leaking names is really not that much of a worry...) Richard> My plan is to give a little of the science behind Richard> bufferbloat mitigation and also put in a plug for Richard> CeroWrt. Any topics I haven't already mentioned that I Richard> should? Thanks! Use the fountain images that Van Jacobson used at IETF84. -- ] He who is tired of Weird Al is tired of life! | firewalls [ ] Michael Richardson, Sandelman Software Works, Ottawa, ON |net architect[ ] mcr@sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/ |device driver[ Kyoto Plus: watch the video then sign the petition.