I have three points of confusion after reading the multicast config guide for 5.3.x -- actually, there are many others, but these are the ones currently at my depth.
1. When configuring the router for multicast routing -- is it enough to assign interfaces under "multicast-routing", or do interfaces also need to be added to "router pim" -- if pim config is not necessary if multicast-routing is configured, then what are the use cases for the pim subconfig section?
2. If the RPF for a S,G that has been joined is an interface that is not in multicast-routing or router pim, will the stream be accepted, or does the RFP interface need to be added to multicast-routing or router pim to succeed?
3. Is there a default PIM mode on XR? Or does PIM-SM, PIM-SSM, and PIM-BIDIR all run concurrently and respond according to the configuration and IGMP reports that are received? -- if not concurrent, what is necessary to set PIM for SSM?
The config guide used varying terminology for seemingly synonymous concepts, so I apologize if the answers are in there and I am just missing them.
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