From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next] ipv6: Use 1280 as min MTU for ipv6 forwarding Date: Fri, 26 Feb 2010 04:34:59 -0800 (PST) Message-ID: <20100226.043459.22651337.davem@davemloft.net> References: <20100226092752.GA5969@babylon> <20100226.035947.242568281.davem@davemloft.net> <20100226123244.GB9114@babylon> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: uweber@astaro.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:54228 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935302Ab0BZMel (ORCPT ); Fri, 26 Feb 2010 07:34:41 -0500 In-Reply-To: <20100226123244.GB9114@babylon> Sender: netdev-owner@vger.kernel.org List-ID: From: Ulrich Weber Date: Fri, 26 Feb 2010 13:32:44 +0100 > Clients will set their MTU to 1280 if they receive a > ICMPV6_PKT_TOOBIG message with an MTU less than 1280. > > To allow encapsulating of packets over a 1280 link > we should always accept packets with a size of 1280 > for forwarding even if the path has a lower MTU and > fragment the encapsulated packets afterwards. > > In case a forwarded packet is not going to be encapsulated > a ICMPV6_PKT_TOOBIG msg will still be send by ip6_fragment() > with the correct MTU. > > Signed-off-by: Ulrich Weber Applied, thanks for fixing up this patch.