Hi Barbara, > OTT video does not use multicast. IPTV deployments do use multicast. Those > that I'm aware of require use of the provider-supplied CE router, which has > an IGMP proxy (and MLD proxy if IPv6 multicast is supported) for LAN-to-WAN > multicast management. Where Wi-Fi distribution of these multicast streams is > supported, it is only done on a dedicated (and highly managed and somewhat > proprietary) Wi-Fi network, that is distinct from the general-purpose (and > not "professionally" managed) Wi-Fi network. The LAN interfaces of the > provider-supplied CE router do tend to have IGMP/MLD snooping, to keep from > flooding the general-purpose network interfaces with large multicast streams. > There may also be a coax networking interface. If there is, this also tends > to be dedicated and highly managed. Where Ethernet is used for distribution > of multicast, it is done so that the provider STBs are all attached to the > provider CE router via the same Ethernet port (and no other devices use that > port) and the re are no intervening routers. I mentioned at the last IETF that I expect some "home networks" to have managed and unmanaged segments. I don't consider the dedicated, managed segments to be part of the homenet domain. I would hope that the provider-supplied CE router would support homenet on its general purpose network interfaces. > > I'd be curious to learn about multicast IPTV deployments that allow users to > supply their own CE routers and send multicast streams on network segments > that are also used for general-purpose home networking (especially > general-purpose Wi-Fi networks).
The above is correct. Provider-supplied CPEs are currently necessary and intermediate routers are not supported. The TV streams can be on a separate VLAN. But this is what is currently done because of the difficulty of doing it over the regular home network. It doesn't mean we should design Homenet in the same way. I'd rather see that providers supply Homenet routers to their customers and that the multicast TV streams just work. Cheers, Sander _______________________________________________ homenet mailing list [email protected] https://www.ietf.org/mailman/listinfo/homenet
