[multrans] How does the receiver initially acquire the <Source, Group> address pair?

[Tom Taylor <[e-mail]>]

I am thinking of the IPTV case.

I need help in understanding how receiver address acquisition works in 
the absence of v4/v6 transition issues. I assume the receiver gets the 
address pair from some sort of signalling exchange with a network node 
(please verify), but would this node be located in the core network 
serving the receiver or hang off the backbone network beyond that (which 
is where I assume the sources lie)?

Of course, in some cases the addresses could be configured by management 
action.

Tom Taylor