From owner-freebsd-net Fri Sep 13 3:51:35 2002 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 B976F37B400 for ; Fri, 13 Sep 2002 03:51:31 -0700 (PDT) Received: from web21409.mail.yahoo.com (web21409.mail.yahoo.com [216.136.232.79]) by mx1.FreeBSD.org (Postfix) with SMTP id 7455743E75 for ; Fri, 13 Sep 2002 03:51:31 -0700 (PDT) (envelope-from igbarn@yahoo.com) Message-ID: <20020913105131.85419.qmail@web21409.mail.yahoo.com> Received: from [194.159.6.17] by web21409.mail.yahoo.com via HTTP; Fri, 13 Sep 2002 11:51:31 BST Date: Fri, 13 Sep 2002 11:51:31 +0100 (BST) From: =?iso-8859-1?q?Iain=20Barnes?= Subject: gif intergace MTU problem - take 2 To: freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Ok, We have a number of 6over4 gif interfaces configured on our 4.6 release machine. The default MTU is configured as 1280, which is fine, but when attempting to increase this to a larger value, such as 1400, ifconfig reports that the new value has been applied correctly, but upon actually sending large packets we find that v6 fragmentation occurs at source. We need to increase the MTU to take into account a further layer of tunnelling applied downstream of the FreeBSD machine. It appears that the MTU isn't being honoured as set. Is this a known problem fixed by 4.6.2 ? Iain __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message