Re: A concern about draft-acg-mboned-multicast-models recommendations

On Thu, 1 Mar 2018, Manfredi, Albert E wrote:

>
> I get that inter-domain, with PIM-SM, that simplicity cannot exist. So 
> inter-domain, SSM is actually simpler. It removes that rendezvous point 
> complication, and then having to find a better route around it, for the 
> multicasts.

It makes it easier for the network, but it might make it harder for the 
applications.

Personally I do not know enough about what multicast applications are out 
there and why it might make their lives much easier if ASM exists, but I 
imagine these exist. The classic case was a many-user video conference 
where you had no application layer protocol to understand who might be 
sending video to you. I remember the 90ties where there was a multicast 
group with lots of webcams in it, so you could get real time glimpses 
of the world. There you just pointed your client to the multicast group 
and it split up each camera into a separate window, without any need for a 
source discovery protocol in the client.

-- 
Mikael Abrahamsson    email: [email protected]

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