From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Subject: Re: Cannot re-enable 'auto' for IPv6 link local? Date: Tue, 24 Sep 2013 16:04:10 -0700 Message-ID: <52421A6A.8050703@candelatech.com> References: <5242181A.6090300@candelatech.com> <20130924225700.GC4446@order.stressinduktion.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: netdev Return-path: Received: from mail.candelatech.com ([208.74.158.172]:46568 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752706Ab3IXXEK (ORCPT ); Tue, 24 Sep 2013 19:04:10 -0400 Received: from [192.168.100.236] (firewall.candelatech.com [70.89.124.249]) (authenticated bits=0) by ns3.lanforge.com (8.14.2/8.14.2) with ESMTP id r8ON4AGk018559 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 24 Sep 2013 16:04:10 -0700 In-Reply-To: <20130924225700.GC4446@order.stressinduktion.org> Sender: netdev-owner@vger.kernel.org List-ID: On 09/24/2013 03:57 PM, Hannes Frederic Sowa wrote: > On Tue, Sep 24, 2013 at 03:54:18PM -0700, Ben Greear wrote: >> At one time, I'm fairly certain this worked, but not having much >> luck in a hacked 3.9.11+ kernel: >> >> The goal is to enable the link-local address to be auto-configured. >> At start of this, there is no /proc/sys/net/ipv6/config/eth30 dir >> because all IPv6 addrs were removed (I suppose). >> >> # ./local/sbin/ip -6 addr add 2345::18 dev eth30 >> # echo 1 > /proc/sys/net/ipv6/conf/eth30/autoconf >> # cat /proc/sys/net/ipv6/conf/eth30/autoconf >> 1 >> # ./local/sbin/ip -6 addr del 2345::18 dev eth30 >> # cat /proc/sys/net/ipv6/conf/eth30/autoconf >> cat: /proc/sys/net/ipv6/conf/eth30/autoconf: No such file or directory >> >> >> What is the proper way to turn on ipv6 auto configuration? > > This issue is fixed by commit 876fd05ddbae03166e7037fca957b55bb3be6594 ("ipv6: > don't disable interface if last ipv6 address is removed"). > > Greetings, > > Hannes > Thanks! I'll add that to my 3.9 kernel. A secondary problem in my case is that the NIC and/or fibre cable has issues and it had just lost link and I did not notice right away... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com