From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Thery Subject: Re: Lost packets after switching Wi-Fi AP Date: Tue, 31 Oct 2006 09:46:19 +0100 Message-ID: <45470D5B.5010105@bull.net> References: <4546127D.10403@bull.net> <20061030211923.79292f8d@griffin.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:4807 "EHLO ecfrec.frec.bull.fr") by vger.kernel.org with ESMTP id S1422881AbWJaInA (ORCPT ); Tue, 31 Oct 2006 03:43:00 -0500 To: Jiri Benc In-Reply-To: <20061030211923.79292f8d@griffin.suse.cz> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Jiri Benc wrote: > On Mon, 30 Oct 2006 15:55:57 +0100, Benjamin Thery wrote: >> When I switch my Mobile Node between 2 Wi-Fi Access Points, there is a >> period of time where all the packets I send are lost, although I got >> the netlink event SIOCGIWAP 'up' for the new AP. The device is >> supposed to be ready, but the packets are lost. > > Which wireless card are you using? Which version of the kernel? Hi Jiri, The kernel version is 2.6.16.20 (the latest kernel version officially supported by MIPv6). I'd like to use a 2.6.19 but unfortunately not all the IPv6 mobility patches are in. I reproduced the problem with an Intel Pro Wireless 2200 (latest driver version: 1.2.0) and a pcmcia "D-Link Airplus G+ DWL-G650+" using the ndiswrapper version 1.25. But I'm not sure the problem is wireless-specific. And as I wrote in my first message I'm also surprised that when noop_enqueue() is used, the return code is NET_XMIT_CN, whereas the packet seems to be dropped. Thanks for your help. Benjamin > Jiri > -- B e n j a m i n T h e r y - BULL/DT/Open Software R&D http://www.bull.com