From: gladston@br.ibm.com
Date: Thu Apr 21 2005 - 14:05:36 GMT-3
Suppose R5 is the Hub, R1 and R2 are spokes.
R5 is the RP mapping agent.
R1 and R2 are RPs.
R2 is elected the RP for all groups.
R4 is PIM neighbor of R1.
There is a source for group 239.1.1.1 connected to R4.
There is a client for group 239.1.1.1 connected to R5.
R4 registers with RP R2 and forwards multicast.
R5 receives the IGMP join from the client and joins the Shared Tree.
R5 joins the Shortest tree.
Now, as R5 is the Hub connected to R2 and R1 via the same multipoint interface, it seems it is necessary a method to differentiate the join/prune from R1 and from R2 (nbma mode).
Would you agree?
Would you agree even considering R2 and R1 are RPs and the main method is Sparse-mode, although it should reverse to Dense-mode if the RP is lost?
source----->R4-----R1------------ s0/0 R5---------destination
|
|
R2------------
R2 - RP (elected)
R1 - RP
R5 - Agent
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