[ih] ARPANET pioneer Jack Haverty says the internet was never finished

[Brian E Carpenter]

Actually inter-ISP diffserv is technically well defined now
as is mapping to MPLS and 5G classes of service. But indeed,
the issue for diffserv and multicast is the same: there is
no cost-effective business model across ISP boundaries.
Flat-rate best-effort capacity-based charging is still vastly
cheaper and simpler to implement. I can't see any reason that
will ever change.

Regards
    Brian

On 04-Mar-22 08:10, Dave Crocker via Internet-history wrote:
> 
>> The small amount of multicast address space really isn't a problem in
>> practice.  For any successful, scalable multicast deployment, you'll end up
>> with source-rooted trees and the forwarding state in the routers are (S,G)
>> tuples.
> 
> 
> Broadly, for anything like TOS or multicast, there are two different
> sets of issues, either of which can easily create showstoppers.
> 
> First is, of course, the mechanics.  What is the functional design?
> What is the basis for believing it will satisfy real-world needs?  How
> robust will it be?  How easy to operate?  Etc.
> 
> Second is gaining adoption across a very large range of entirely
> independent operators.  What are their immediate, compelling business
> incentives?
> 
> As we keep seeing, getting adoption of anything across an Internet
> infrastructure service, is more than a little challenging.
> 
> Cable TV's multicast is done within the span of a single administrative
> control.  And it's a relatively stable, constrained set of traffic.
> Generic Internet multicast is multiple administrations, with highly
> variable sets of traffic, across many administrations.  Very, very
> different game.
> 
> d/
>