Genial post… It helped me alot!

A Networker Blog.-

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PIM sparse mode (PIM SM)  the traffic from sources to the RP initially flows encapsulated in Register messages.

This activity is very intensive because of encapsulation/de-encapsulation mechanisms, also an SPT is built between the RP and the source (initiated by the RP), which results in (*, G) and (S, G) entries created between the RP and the source.

 

For the moment lets have this scenario

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There are two commands that you need for simple PIM sparse mode (PIM SM) deployment (assuming that the rendezvous point [RP] is learned automatically via Auto-RP or bootstrap router [BSR] mechanisms; if not, the RP address has to be manually configured (using the ip pim rp-address).

  • Global command ip multicast-routing enables support for IP multicast on a router.
  • Interface command ip pim sparse-mode enables PIM SM operation on the selected interface.

An additional command is the SPT threshold,  the default …

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