From owner-freebsd-hackers@FreeBSD.ORG  Sun Dec  7 08:01:25 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id A273416A4CE
	for <freebsd-hackers@freebsd.org>;
	Sun,  7 Dec 2003 08:01:25 -0800 (PST)
Received: from asarian-host.net (mail.asarian-host.net [194.109.160.70])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E1AA943FE0
	for <freebsd-hackers@freebsd.org>;
	Sun,  7 Dec 2003 08:01:23 -0800 (PST)
	(envelope-from admin@asarian-host.net)
Comments: To protect the identity of the sender, certain header
	fields are either not shown, or masked. Anonymous email
	accounts can be requested by filling in the appropriate
	form at: https://asarian-host.net/cgi-bin/signup.cgi
Received: (from root@localhost)
	by mail.asarian-host.net (8.12.10/8.12.10) id hB7G1NjI038032
	for freebsd-hackers@freebsd.org; Sun, 7 Dec 2003 17:01:23 +0100 (CET)
	(envelope-from admin@asarian-host.net)
From: Mark <admin@asarian-host.net>
Received-SPF: pass (asarian-host.net: SASL permitted sender)
Message-Id: <200312071601.HB7G1LGQ038007@asarian-host.net>
Date: Sun, 07 Dec 2003 16:01:23 GMT
X-Authenticated-Sender: admin@asarian-host.net
X-Trace: P4j7IoGIgEnYMY8C80PYNbIMOny1At0Sp5IKrAi5ij7pTEshM/lEg3/k9iE91ttqbbaukHn/T5kKUoQMpY9eLA==
X-Complaints-To: abuse@asarian-host.net
X-Abuse-Info: Please be sure to forward a copy of ALL headers,
	otherwise we are unable to process your complaint
Organization: Asarian-host
To: <freebsd-hackers@freebsd.org>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
X-Auth: Asarian-host PGP signature
	iQEVAwUAP9NO0zFqW1BleBN9AQGIkQf/fftuGOMlZzbbBZN5A4z3+8f/avE0wFDB
	s079ZMTs55qDVzzJhclqEtFZrUpBkWVmbXFOpKlWud7OW1lWbtIWGo9ugQV2Mw+M
	7TPKvXQFGFU5YnFaI/okKQEfHpOa/68u8H8g92nPpNfR6nC1iZyebTONGrHpXiM1
	YUx03dDVtmtb9oY0C54PYcq/Au3wvdqGLoLgv22h2sqDkIpfXJOkkvBvuMrJ0K0I
	qlFGzP4Y0q0WtvU711moUuFHOlIBz+lkOhoTTp/LiBHjg/zcF2kJNUuczvpowmcv
	BlUAxLlemQdGKxOcqS0e1/tLpE3k7bI/W4s/eoS8JdQPQ74wBHkvqw==
	=puxe
Subject: Explicit Congestion Notification
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 07 Dec 2003 16:01:25 -0000

Hello,

Someone on the freebsd-questions list suggested I ask my question on the
hackers list. So here goes. If this is the wrong place, then you have my
apologies.

I am looking for a way to enable Explicit Congestion Notification for TCP on
FreeBSD 4.7R (IPv4). And google is really not very helpful in that regard.
Nor the FreeBSD site, for that matter. I found "option TCP_ECN" for the
kernel. Does that option alone suffice? I still rather hope this can be
controlled with a sysctl maneouvre. But if a kernel recompile is required, I
rather know what to do exactly.

Thank you for your time.

- Mark