AutoRP and pim sparse

From: ccie taker (cheechew@hotmail.com)
Date: Thu Sep 14 2006 - 10:31:03 ART


I am confusing now with autorp in pim sparse mde environment. Theory state
that in sparse mode environment you need to have RP. Fair enough. I have
setup this to test it out and is proven RP is need.

However, in order for autoRP to work (224.0.0.39 and 224.0.0.40) dense-mode
must be facilitate the two group to work. I found that even all link in
sparse-mode and withut ip pim autorp listener, I am able to ping the
muilticast group from one end to another few hops away. I am confusing now.

Some one could help me to understand this.

R1 ----- sparse mode ----- R2 ----- sparse mode ----- R3

R1: able to ping 224.3.3.1
R2: RP candidate and mapping agent
R3: ip igmp join-group 224.3.3.1



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