From owner-freebsd-net@FreeBSD.ORG Tue Mar 15 18:26:08 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B6F121065670 for ; Tue, 15 Mar 2011 18:26:08 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta03.westchester.pa.mail.comcast.net (qmta03.westchester.pa.mail.comcast.net [76.96.62.32]) by mx1.freebsd.org (Postfix) with ESMTP id 76AEC8FC13 for ; Tue, 15 Mar 2011 18:26:08 +0000 (UTC) Received: from omta15.westchester.pa.mail.comcast.net ([76.96.62.87]) by qmta03.westchester.pa.mail.comcast.net with comcast id KWHM1g00D1swQuc53WS827; Tue, 15 Mar 2011 18:26:08 +0000 Received: from koitsu.dyndns.org ([98.248.33.18]) by omta15.westchester.pa.mail.comcast.net with comcast id KWS51g00W0PUQVN3bWS6Ea; Tue, 15 Mar 2011 18:26:07 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 9DD359B422; Tue, 15 Mar 2011 11:26:03 -0700 (PDT) Date: Tue, 15 Mar 2011 11:26:03 -0700 From: Jeremy Chadwick To: Steve Polyack Message-ID: <20110315182603.GA37095@icarus.home.lan> References: <4D7F69FF.2020608@comcast.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D7F69FF.2020608@comcast.net> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: freebsd-net@freebsd.org, freebsd-stable Subject: Re: MAC address / per-proto ARP caching in 8.1-RELEASE X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Mar 2011 18:26:08 -0000 On Tue, Mar 15, 2011 at 09:30:39AM -0400, Steve Polyack wrote: > Is anyone aware of some sort of facility in either FreeBSD > 8.1-RELEASE or the em(4) driver which would cause it to cache MAC > addresses / ARP entries for hosts on a per-protocol basis? > > [snipping remaining details; readers can read it here instead:] > [http://lists.freebsd.org/pipermail/freebsd-stable/2011-March/061908.html] The only thing I can think of would be flowtable, but I'm not sure if it's enabled by default on 8.1-RELEASE-p2. You can try the following sysctl to disable it (I would recommend setting this in sysctl.conf and rebooting; I don't know what happens in the case you set it on a live system that's already experiencing the MAC issue you describe). net.inet.flowtable.enable=0 Details: http://conferences.sigcomm.org/sigcomm/2009/workshops/presto/papers/p37.pdf -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP 4BD6C0CB |