From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhuyj Subject: Re: ipv6:remove ipv6 global address after the interface is down Date: Tue, 01 Apr 2014 18:12:09 +0800 Message-ID: <533A90F9.3050807@gmail.com> References: <533A8737.8050108@gmail.com> <20140401093544.GF24150@order.stressinduktion.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: Paul Gortmaker , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: In-Reply-To: <20140401093544.GF24150@order.stressinduktion.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 04/01/2014 05:35 PM, Hannes Frederic Sowa wrote: > On Tue, Apr 01, 2014 at 05:30:31PM +0800, zhuyj wrote: >> Hi, Paul >> >> With kernel 2.6.34.x, the following problem will appear. >> >> TargetA ------------------------- TargetB >> 3000::1/64 3000::2/64 >> >> TargetA >> - bring the interface down by doing an "ifconfig eth1 down" >> - bring the interface back up by doing an "ifconfig eth1 up" >> >> TargetB >> - ping6 3000::1 >> ping6 succeeds the first time >> - after bringing the interface on TargetA down and then back up, >> ping6 to the interface fails. >> >> With the latest mainline kernel(3.4+), this problem is resolved. When >> eth1 is down, ipv6 address and route item are removed. >> But with kernel 2.6.34.x, when eth1 is down, ipv6 address remains while >> route item is removed. >> >> So when eth1 is up and assign the previous ipv6 address, with 2.6.34.x, >> some errors will appear. But with latest mainline kernel, it can work well. >> >> So I made a patch to fix this problem in kernel 2.6.34.x. Please merge >> this to kernel2.6.34.x. > 2.6.34 stable is EOL and won't get updated anymore. If this is problem is also > present in other, still maintained, stable kernel this would be possible. Hi, Hannes It is fortunate. I checked other stable kernel. They can work well. Maybe this patch can only fix the problem on 2.6.34.x. > > Can you identify the upstream commit which repaired this problem and when it > got introduced? commit 73a8bd74 [ipv6:Revert 'administrative down' address handling changes] can fix this problem. Best Regards! Zhu Yanjun > > Thanks, > > Hannes > >