From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Tomt Subject: Re: unregister_netdevice: waiting for tun6to4 to become free. Date: Thu, 23 Sep 2004 09:13:26 +0200 Sender: netdev-bounce@oss.sgi.com Message-ID: <41527796.4010204@tomt.net> References: <20040920212453.GA15392@ee.oulu.fi> <414F7CD9.3090008@pobox.com> <414FC92F.6090009@tomt.net> <20040921121332.GR31616@rei.reeler.org> <4151E680.80203@tomt.net> <20040922211942.GA1674@postel.suug.ch> <41523670.1090603@tomt.net> <41523EC5.20805@tomt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: Thomas Graf In-Reply-To: <41523EC5.20805@tomt.net> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org (CC'ed to netdev) I can taste the bug now :-) Me and Thomas Graf have been discussing this a bit off-list; so for those on netdev, this is my current setup: server A sets up a sit tunnel to server B. server B has a sit tunnel to Provider. All communication between A, B and Provider is going over ethernet on the physical layer. server B is the one getting stuck in "waiting for to become free.." when ifdown'ing (ip tunnel del) the interface to Provider. If I boot with net.ipv6.conf.default.forward = 1 in sysctl.conf - but then after the boot do echo 1 > /proc/sys/net/ipv6/conf/all/forward (to actually get it running) we'll crash and burn when taking down the interface. Only setting /proc/sys/net/ipv6/conf/all/forward = 1, but never touch default, it goes down cleanly. I have the ipv6/conf/default/forwarding set in sysctl.conf on all the routers, and it seems zebra sets the ipv6/conf/all/forwarding later on.