From owner-svn-src-all@freebsd.org  Thu Dec 17 19:20:54 2015
Return-Path: <owner-svn-src-all@freebsd.org>
Delivered-To: svn-src-all@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 82778A4AA2F;
 Thu, 17 Dec 2015 19:20:54 +0000 (UTC)
 (envelope-from glebius@FreeBSD.org)
Received: from cell.glebius.int.ru (glebius.int.ru [81.19.69.10])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "cell.glebius.int.ru", Issuer "cell.glebius.int.ru" (not verified))
 by mx1.freebsd.org (Postfix) with ESMTPS id 0EFBE1316;
 Thu, 17 Dec 2015 19:20:53 +0000 (UTC)
 (envelope-from glebius@FreeBSD.org)
Received: from cell.glebius.int.ru (localhost [127.0.0.1])
 by cell.glebius.int.ru (8.15.2/8.15.2) with ESMTPS id tBHJKp5x050439
 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);
 Thu, 17 Dec 2015 22:20:51 +0300 (MSK)
 (envelope-from glebius@FreeBSD.org)
Received: (from glebius@localhost)
 by cell.glebius.int.ru (8.15.2/8.15.2/Submit) id tBHJKp4O050438;
 Thu, 17 Dec 2015 22:20:51 +0300 (MSK)
 (envelope-from glebius@FreeBSD.org)
X-Authentication-Warning: cell.glebius.int.ru: glebius set sender to
 glebius@FreeBSD.org using -f
Date: Thu, 17 Dec 2015 22:20:51 +0300
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: Steven Hartland <steven@multiplay.co.uk>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r292379 - in head/sys: netinet netinet6
Message-ID: <20151217192051.GM42340@FreeBSD.org>
References: <201512162226.tBGMQSvs098886@repo.freebsd.org>
 <20151217003824.GG42340@FreeBSD.org> <5672C6AE.7070407@freebsd.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <5672C6AE.7070407@freebsd.org>
User-Agent: Mutt/1.5.23 (2014-03-12)
X-BeenThere: svn-src-all@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: "SVN commit messages for the entire src tree \(except for &quot;
 user&quot; and &quot; projects&quot; \)" <svn-src-all.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/>
List-Post: <mailto:svn-src-all@freebsd.org>
List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>,
 <mailto:svn-src-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 17 Dec 2015 19:20:54 -0000

  Steven,

another feasible solution for the design described in the 156226
would be to run STP on the switches, and if_bridge(4) instead of
if_lagg(4) on FreeBSD, also with STP enabled. Would work perfectly.

Of course, if switches are dumb and cheap, and can't do STP,
then a tiny bpf-writer is the right solution.

P.S. When I was running network in my university dormitory, we
used a lot of cheap solutions, and a lot of dirty workarounds,
but none of the latter made its way to FreeBSD kernel. You can
also ask Eugene Grosbein, he also has huge experience of living
on not so pleasant workarounds, but not pushing them agrressively
into the kernel.

-- 
Totus tuus, Glebius.