From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qy0-f178.google.com (mail-qy0-f178.google.com [209.85.216.178]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 7217B201A49 for ; Mon, 16 May 2011 04:14:03 -0700 (PDT) Received: by qyk2 with SMTP id 2so2986351qyk.16 for ; Mon, 16 May 2011 04:23:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:sender:message-id:date:from:organization :user-agent:mime-version:to:subject:references:in-reply-to :content-type:content-transfer-encoding; bh=6pcG9/+yfyJaZ/5ZJQoTIQNhNH0iJJ40laRlIStZnkM=; b=qXFFCI+u3esFJn3h+WoSgq7uXLbrdOQJejhawvScZ0vkdLk92kS9pNFUasVXmMEu2e VjoAckTDtcCcyfx+XmUKMXegDae7KMfVTHzzZx8LxgXB1lh/YNTmL21CBAgIeVsRAvcS pasNEjsbVB36FReJigpE1ID8BTojDOGCn3W7M= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:organization:user-agent:mime-version:to :subject:references:in-reply-to:content-type :content-transfer-encoding; b=U6/4XnQIvZ4ZPuhPDCJq/WlriR+OR9CnmrAhgfCHKcUuUOF6g2wuE41mJyMlq3/oPo rMvU4VcsCu0Gdyf7ED0CjIxtI6s5IQdTzwtDuLoDmqb+XOWXXbHNqfU26eBERXsPGpvO jXjB8WbNmVP0QwBaIldczkvsO3je2QsA0WIdY= Received: by 10.229.1.166 with SMTP id 38mr3082974qcf.195.1305545018509; Mon, 16 May 2011 04:23:38 -0700 (PDT) Received: from [192.168.1.119] (c-98-229-99-32.hsd1.ma.comcast.net [98.229.99.32]) by mx.google.com with ESMTPS id m9sm3179081qcu.39.2011.05.16.04.23.36 (version=SSLv3 cipher=OTHER); Mon, 16 May 2011 04:23:37 -0700 (PDT) Sender: Jim Gettys Message-ID: <4DD10938.7020703@freedesktop.org> Date: Mon, 16 May 2011 07:23:36 -0400 From: Jim Gettys Organization: Bell Labs User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110424 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: bloat@lists.bufferbloat.net References: <4DB70FDA.6000507@mti-systems.com> <4DC2C9D2.8040703@freedesktop.org> <20110505091046.3c73e067@nehalam> <6E25D2CF-D0F0-4C41-BABC-4AB0C00862A6@pnsol.com> <35D8AC71C7BF46E29CC3118AACD97FA6@srichardlxp2> <1304964368.8149.202.camel@tardy> <4DD9A464-8845-49AA-ADC4-A0D36D91AAEC@cisco.com> <1305297321.8149.549.camel@tardy><014c01cc11a8$de78ac10$9b6a0430$@gross@avanw.com><8A928839-1D91-4F18-8252-F06BD004E37D@cisco.com><5946BA6B-4E00-43AF-A8A2-17FB3769F37B@cisco.com> <2EEFB9D5-E9CC-4612-8D91-F6B382E3C2FB@gmail.com> <13672E5D-7EAE-446A-A8D8-BA85EF2CE72E@cisco.com> In-Reply-To: <13672E5D-7EAE-446A-A8D8-BA85EF2CE72E@cisco.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] Jumbo frames and LAN buffers 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: Mon, 16 May 2011 11:14:03 -0000 On 05/16/2011 05:49 AM, Fred Baker wrote: > On May 16, 2011, at 9:51 AM, Richard Scheffenegger wrote: > >> Second, you wouldn't want to deploy basic 802.3x to any network consisting of more than a single switch. > actually, it's pretty common practice. Three layers, even. People build backbones, and then ring them with workgroup switches, and then put small switches on their desks. > Not necessarily out of knowledge or desire (since it isn't usually controllable in the small switches you buy for home). It can cause trouble even in small environments as your house. http://virtualthreads.blogspot.com/2006/02/beware-ethernet-flow-control.html I know I'm at least three consumer switches deep, and it's not by choice. - Jim