From owner-freebsd-net@FreeBSD.ORG  Tue Jul 29 20:41:05 2008
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
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 00064106564A
	for <freebsd-net@freebsd.org>; Tue, 29 Jul 2008 20:41:04 +0000 (UTC)
	(envelope-from sam@freebsd.org)
Received: from ebb.errno.com (ebb.errno.com [69.12.149.25])
	by mx1.freebsd.org (Postfix) with ESMTP id CB0E68FC18
	for <freebsd-net@freebsd.org>; Tue, 29 Jul 2008 20:41:04 +0000 (UTC)
	(envelope-from sam@freebsd.org)
Received: from trouble.errno.com (trouble.errno.com [10.0.0.248])
	(authenticated bits=0)
	by ebb.errno.com (8.13.6/8.12.6) with ESMTP id m6TKf4hM091570
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Tue, 29 Jul 2008 13:41:04 -0700 (PDT) (envelope-from sam@freebsd.org)
Message-ID: <488F8060.70600@freebsd.org>
Date: Tue, 29 Jul 2008 13:41:04 -0700
From: Sam Leffler <sam@freebsd.org>
Organization: FreeBSD Project
User-Agent: Thunderbird 2.0.0.9 (X11/20071125)
MIME-Version: 1.0
To: "John T. Yocum" <jtyocum@publicmx.com>
References: <20080729114237.45525xviqzjqf9nh@www.publicmx.com>
In-Reply-To: <20080729114237.45525xviqzjqf9nh@www.publicmx.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-DCC-Misty-Metrics: ebb.errno.com; whitelist
Cc: freebsd-net@freebsd.org
Subject: Re: ath using hostap sets MTU to 2290
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
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: Tue, 29 Jul 2008 20:41:05 -0000

John T. Yocum wrote:
> Hello,
>
> I have a system running pfSense, which is built on top of FreeBSD 
> 7.0-RELEASE-p3. In the system I have an Atheros wireless card, which 
> when I enable hostap, changes it's MTU to 2290. If an explanation is 
> listed on a man page, I apologize, I did try searching.
>
> Any ideas why this might happen? It doesn't appear to be a pfSense 
> issue, as it appears their code actually tries to set the MTU to 1500.
>
> Only reason I ask here, is I noticed in my searching on Google, I 
> noticed others that aren't running pfSense have their MTU set to 2290.
MTU on an 802.11 network is 2290.  If you don't want the default then 
change it.  If you cannot then please provide the exact steps you take 
that do not work.

    Sam