From owner-freebsd-net@FreeBSD.ORG  Wed Jan 12 22:44:30 2005
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id C068416A4CE
	for <freebsd-net@freebsd.org>; Wed, 12 Jan 2005 22:44:30 +0000 (GMT)
Received: from postal2.es.net (postal2.es.net [198.128.3.206])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7CD9143D2F
	for <freebsd-net@freebsd.org>; Wed, 12 Jan 2005 22:44:30 +0000 (GMT)
	(envelope-from oberman@es.net)
Received: from ptavv.es.net ([198.128.4.29])
        by postal2.es.net (Postal Node 2) with ESMTP (SSL) id IBA74465;
        Wed, 12 Jan 2005 14:44:30 -0800
Received: from ptavv (localhost [127.0.0.1])
	by ptavv.es.net (Tachyon Server) with ESMTP id D590B5D08;
	Wed, 12 Jan 2005 14:44:29 -0800 (PST)
To: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?=
	<jinmei@isl.rdc.toshiba.co.jp>
In-reply-to: Your message of "Wed, 12 Jan 2005 12:00:36 PST."
             <20050112200036.B058C5D07@ptavv.es.net> 
Date: Wed, 12 Jan 2005 14:44:29 -0800
From: "Kevin Oberman" <oberman@es.net>
Message-Id: <20050112224429.D590B5D08@ptavv.es.net>
cc: freebsd-net@freebsd.org
cc: nesg@es.net
Subject: Re: [nesg] Re: IPv6 TCP transfers are hanging 
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 12 Jan 2005 22:44:31 -0000

Tatuya-san,

I think this is almost certainly a network issue. I suspect that the MTU
is really NOT 1500. It's probably a couple of bytes less due to
tunneling or something similar. Unfortunately when I tried ping6 to test
with various packet sizes, my FreeBSD 5.3-Stable box did a reboot. (No
panic or dump.) Not very nice. Guess I need to look at this.

Sorry to have wasted people's time on this.

If it turns out that I am wrong about this, I'll send another report.

Thanks for your time!
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634