Prune in Dense Mode Partial Meshed

From: gladston@br.ibm.com
Date: Wed Jul 14 2004 - 12:53:15 GMT-3

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I understand the problem that arises when a spoke router sends a Prune message to the Hub in a partial-meshed FR subnet, causing a second spoke to lost multicast packets because it did not see the Prune.
 
I am trying to figure out why it is different with Sparse-mode. As I view it if R1 (hub) receives a message from R2 (spoke A) to stop sending multicast out Serial0, R3 (spoke B) will not hear the message either, as it occurs with Dense-mode.

  Any Tip?

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