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Date:      Thu, 20 Jan 2011 20:00:46 +0100
From:      Petr Lampa <lampa@fit.vutbr.cz>
To:        bzeeb-lists@lists.zabbadoz.net, ticso@cicely7.cicely.de
Cc:        freebsd-net@freebsd.org, ume@freebsd.org
Subject:   Re: strange netstat -ian output
Message-ID:  <20110120190046.GA41950@fit.vutbr.cz>
In-Reply-To: <20110120161445.GX39356@cicely7.cicely.de>

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After our private mail exchange with B.Walter I've looked at the sources and 
RFC drafts and realised that Node Information ICMPv6 was taken out from KAME 
in 2000 and that code was implemented according draft-07. The group address 
was then changed in draft-13 (2006) to the same format as solicited node 
address. This was not reflected in source and it's questionable if it has to.
Some more research about how this is currently implemented in other *BSD
and Linux systems should be done first. It's easy to change 4bytes hash to
3bytes hash, but we will loose back compatibility with older systems.
Perhaps, some sysctl setting would solve this. In any case I've also
opened another bug report for this:
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/154169

Petr Lampa

-- 
Computer Centre                             E-mail: lampa@fit.vutbr.cz
Faculty of Information Technology           Web: http://www.fit.vutbr.cz/
Brno University of Technology               Fax:  +420 54114-1270
Bozetechova 2, 612 66 Brno, Czech Republic  Phone: +420 54114-1225



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