Robert Brockway wrote: > On Tue, 20 Apr 2010, Edward Ned Harvey wrote: > > >> I imagine a world where MLB generates a data stream of the Red Sox in the >> World Series. They send one data stream, and it multicasts to all the >> millions of people watching. The stream is kept as consolidated as possible >> > > Actually this sort of thing was done long ago. As far back as 1992-4 I > saw concerts & shuttle launches over multicast. > > >> I wonder if my expectations are totally off? Does IPv6 multicast satisfy >> the scenario of video multicast to millions of simultaneous viewers? >> > > Are there problems with IPv4 multicast scalability? > > Cheers, > Scalability is good, IME, but interoperability between vendors, vendor implementations, and according to standards is somewhat lacking in V4 because it's a bunch of add-in hacks. With IpV6 it is much more integrated, so, I believe it will start to get much more use.
(yes, IETF used to, and probably still does (though I haven't checked) multicast meetings. The thing is, it has to be enabled at every single hop along the way to work properly, and many ISPs just don't, or do it wrong, or the equipment they use has bugs, or... With IPv6, since it's in-by-design, this ought to 'just work'. (speculation and hopefulness) _______________________________________________ Discuss mailing list Discuss@lopsa.org http://lopsa.org/cgi-bin/mailman/listinfo/discuss This list provided by the League of Professional System Administrators http://lopsa.org/
