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Date: Tue, 30 Aug 2005 13:26:50 +1200
From: Andrew Thompson <thompsa@freebsd.org>
To: "Bruce A. Mah" <bmah@freebsd.org>
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Subject: Re: if_bridge and IPv6?
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On Mon, Aug 29, 2005 at 06:19:42PM -0700, Bruce A. Mah wrote:
> If memory serves me right, Bruce A. Mah wrote:
> > If memory serves me right, Andrew Thompson wrote:
> > 
> > > From what I can tell this is from the bridge itself, does bridging work
> > > between ipv6 hosts on either side of the bridge?
> > 
> > Hmm...I haven't tried that yet.  Unfortunately I'm not in close
> > proximity to the system in question at the moment, so it'll be a few
> > hours (evening, San Francisco time) until I can try this.  I'll test and
> > report back.
> 
> Bridging of IPv6 packets going between two hosts on either side of the
> bridge appears to work just fine (to the point where I can do ping6 and
> ssh across the bridge).
 
Good to hear something works :)

> > PS.  Food for thought:  Should bridge devices have IFF_MULTICAST set?
> > Mine doesn't.
> > 
> > hornet# ifconfig bridge0
> > bridge0: flags=41<UP,RUNNING> mtu 1500
> >         inet (foo) netmask 0xffffff00
> >         inet6 (bar) prefixlen 64
> >         ether ac:de:48:cd:e2:32
> >         priority 32768 hellotime 2 fwddelay 15 maxage 20
> >         member: sis1 flags=3<LEARNING,DISCOVER>
> >         member: sis0 flags=3<LEARNING,DISCOVER>
> 
> This looks more and more suspicious to me.  IPv6 ND requires multicast
> to work and there are several explicit checks for IFF_MULTICAST in the
> IPv6 output path and neighbor discovery code.

I think you are right, i'll look into it.


Andrew