Agree. I would not architect around multi-hop multicast, subnet OK, targeted probably.
Not sure everyone has had the pleasure of running large IP multicast infrastructures running video, it is a wonderful challenge. It also has the side benefit of encouraging poorly designed applications. Interoperability on even core routers for IP multicast barely exists. In a home environment, although smaller, will be even less wonderful. Just the race conditions between PIM and the IGP are always challenging. On 2/20/15, 1:50 PM, "Joel M. Halpern" <[email protected]> wrote: >It seems pretty clear that over time, the bulk of video will be unicast, >in order to meet on-demand needs. There will always be a few items that >folks really want to watch live, and thus where multicast may add value. > But making multicast the design driver for home networking >archtiecture seems backwards to me. > >Yours, >Joel > >On 2/20/15 1:22 PM, Dave Taht wrote: >> On Fri, Feb 20, 2015 at 10:10 AM, Mikael Abrahamsson <[email protected]> >>wrote: >>> On Fri, 20 Feb 2015, Toerless Eckert wrote: >>> >>>> So foremost, it would be good to understand if there really is home L2 >>>> equipment that MUST see MLD to operate correctly. Otherwise i'd >>>>happily >>>> ignore the problem and say there is enough bandwidth to just NOT DO >>>>snooping >>>> but have multicast be flooded in the L2 segments. >>> >>> >>> I know of ATA (VoIP) devices with 10/half uplinks that fall over HARD >>>when >>> they receive two simultaneous IPTV streams when doing channel >>>switching. >>> >>> So it's not only about bandwidth, but about how much traffic these >>>kinds of >>> devices are designed to receive. >>> >>> Also, remember that we're going to 4k IPTV streams that might be in >>>the 20 >>> megabit/s range, and we might be doing multiples of them. All devices >>>on the >>> subnet will receive this if there is no MLD/PIM snooping precent. >> >> Is there a formal definition of IPTV? as used here, it seems to imply >>multicast. >> >> Frankly, until now, I was expecting the world to go to a HAS model for >>content, >> especially big content. >> >>> >>> -- >>> Mikael Abrahamsson email: [email protected] >>> >>> _______________________________________________ >>> homenet mailing list >>> [email protected] >>> https://www.ietf.org/mailman/listinfo/homenet >> >> >> > >_______________________________________________ >homenet mailing list >[email protected] >https://www.ietf.org/mailman/listinfo/homenet > _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
