Marshall Eubanks wrote:
I have yet to find one that is interested in interdomain multicast. (They already have infrastructure to get "their" channels, typically by
satellite, and they have no interest in other channels.) I think that this will only
change if sufficiently many internet video channels become popular enough that they can't ignore
them.
The situation can not change, because the currently standardized multicast protocols and its underlying models are incompatible to basic operation/revenue requirements of the real world ISPs.
That is, the protocols does not have proper revenue model to support automatic negotiation between ISPs and between an end user's multicast source and an ISP that manual configuration by ISPs is inevitable.
As a result, current multicast sources are strongly tied to ISPs's internal operations.
It is easier to use unicast for interdomain transmission between ISPs or even between regions within ISPs.
The source of the problem is that multicast is resource reserving communication that each group should be charged from its ISP proportional to the area and time of each group, which can not be controlled today.
Masataka Ohta
PS
I am promoting broadcast with several ISPs in Japan and knows how they are operating.
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