Re: Centralized Multicast:group address.

[Polly Huang <huang@catarina.usc.edu>]

On Wed, 2 Dec 1998, Paula Rincon Mancheno wrote:

> �	 Hi, I am working with Centralized Multicast and I don't know how to
> associate a list of RP nodes with a particular group address.
> 
> 	I mean, when you use a tree-type, you can indicate the address group as 
> 		$mrthandle switch-treetype 0x8003
> but  if you use:
> 		$mrthandle set_c_rp [list $n19 $n29]
> how can I indicate the address group for this list of nodes?

If you are asking 'can I specify group-specific candidate RPs(cores)', 
the short answer is no, not with the current implementation.

In selecting the RPs(cores), centralized mcast uses a pim-like 
bootstrap mechanism, in which the RP for group G rcv in node N is 
determined by a hash funciton H(G,N).   Currently, this hash function 
is set to be very simple: H(G,N)=highest candidate RP, for all G,N.

This is very unlikely, but you might mean 'can I have receivers 
on node $n19 $n29 joined to a specific group', the answer is yes. Just 
take a look at the multicast example scripts, tcl/ex/mcast.tcl or 
tcl/ex/newmcast/mcast*.tcl. 

hope this helps,
-Polly
> 
> 	Thanks for your attention.
> -- 
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