From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cassarossa.samfundet.no (cassarossa.samfundet.no [IPv6:2001:67c:29f4::29]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 3DDAB21F182 for ; Tue, 18 Mar 2014 07:52:27 -0700 (PDT) Received: from pannekake.samfundet.no ([2001:67c:29f4::50] ident=unknown) by cassarossa.samfundet.no with esmtps (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1WPvNN-0006ph-UC for bloat@lists.bufferbloat.net; Tue, 18 Mar 2014 15:52:22 +0100 Received: from sesse by pannekake.samfundet.no with local (Exim 4.80) (envelope-from ) id 1WPvNN-0000rb-F6 for bloat@lists.bufferbloat.net; Tue, 18 Mar 2014 15:52:21 +0100 Date: Tue, 18 Mar 2014 15:52:21 +0100 From: "Steinar H. Gunderson" To: bloat@lists.bufferbloat.net Message-ID: <20140318145221.GA31327@sesse.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline X-Operating-System: Linux 3.13.3 on a x86_64 User-Agent: Mutt/1.5.21 (2010-09-15) Subject: [Bloat] AQM creeping into L2 equipment 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, 18 Mar 2014 14:52:27 -0000 Hi, I thought some of you might be interested in a small observation I made today: Cisco 2960-X, their latest low-end (?) L2 access switch offering (well, it can do some L3 as well, especially the 2960-XR, but I don't think it's very commonly used), has WRED on its feature list. They also have something that looks like SFQ. We ordered two a while back but haven't received them yet, so I haven't tested how well it works in practice. I guess this mirrors my desire since a few years back that _any_ congestion point in your network (and a switch that supports both 10gig and 1gig is a prime candidate for becoming a congestion point on downconversion...) should have some form of AQM. Of course, it's no CoDel or PIE, but you take what you get... /* Steinar */ -- Homepage: http://www.sesse.net/