Re: if_bridge and IPv6?

From: Andrew Thompson (thompsa_at_freebsd.org)
Date: 08/30/05

  • Next message: Bruce A. Mah: "Re: if_bridge and IPv6?" 
    Date: Tue, 30 Aug 2005 13:26:50 +1200
To: "Bruce A. Mah" <bmah@freebsd.org>

    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
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