(usagi-users 02922) Re: IPv6 Multicast on recent Linux Kernels

[Stig Venaas <Stig.Venaas@xxxxxxxxxx>]

On Wed, Apr 21, 2004 at 02:46:40PM +0900, YOSHIFUJI Hideaki / ?$B5HF#1QL@ wrote:
> In article <OF632B4C9E.CE204BC4-ON88256E7D.001B4C0D-88256E7D.001B7716@xxxxxxxxxx> (at Tue, 20 Apr 2004 22:59:58 -0600), David Stevens <dlstevens@xxxxxxxxxx> says:
> 
> > A multicast router should not be needed if you're talking about
> > groups that should be forwarded by the HA, but I don't think
> > that'll work  with or without a multicast router right now.
> 
> Multicast router SHOULD be required to "forward" multicast packets.

There are two implementations for IPv6, one written for exactly this
purpose, of so called MLD/IGMP proxies. In addition to just proxying
the MLD/IGMP, they also forward packets on the interfaces the joins
came from. They are both user space implementations. They could
probably be more efficient, but they are useful. One is called ecmh,
look for it with google, or I believe, earlier threads on this list.

Stig