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Date:      Fri, 20 Jun 2014 13:08:12 +0900 (JST)
From:      Hiroki Sato <hrs@FreeBSD.org>
To:        ler@lerctr.org
Cc:        freebsd-net@freebsd.org
Subject:   Re: IPv6: "xxx::x already configured" in logs... why?
Message-ID:  <20140620.130812.1612764660960146940.hrs@allbsd.org>
In-Reply-To: <20140619140801.GA65420@thebighonker.lerctr.org>
References:  <20140612202349.GA65079@thebighonker.lerctr.org> <20140619.181129.1279477227287764712.hrs@allbsd.org> <20140619140801.GA65420@thebighonker.lerctr.org>

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Larry Rosenman <ler@lerctr.org> wrote
  in <20140619140801.GA65420@thebighonker.lerctr.org>:

le> > le> Ideas? (I may be an idiot, so any criticism welcomed).
le> > le>
le> > le> if you need the 1841's config, I can supply that as well.  It's using a Hurricane
le> > le> electric Tunnel.
le> >
le> >  How frequent were the log message added into /var/log/messages?  And
le> >  when did it start to happen after boot.  Just after lagg0 is
le> >  configured?
le> >
le> > -- Hiroki
le> Looks like:
le>
le> Jun 12 07:00:01 thebighonker kernel: in6_ifadd: 2001:470:1f0f:3ad:223:7dff:fe9e:6e8a is already configured

 Thank you.  Three more questions:

 1. output of "ifconfig lagg0", "ifconfig bce0", and "ifconfig bce1".

 2. output of "netstat -s -i".

 3. output of "ndp -p".

 The cause of the message is that the automatically-configured address
 is not recognized as "configured" one and FreeBSD IPv6 stack is
 trying to add it every time a Router Advertisement message is
 received.  I am still not sure why it happened, but the above three
 would help for further investigation.

-- Hiroki

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