Perform the following basic PIM configuration tasks:
Enable PIM (required)
Add interfaces so the protocol establishes adjacencies with the neighboring routers (required)
Configure a way to calculate group-to-RP mapping (required) by either:
Static group-to-RP mapping
Enable Candidate RP/Bootstrap mechanism on some routers.
Enable unicast routing protocols to learn routes toward the RP/source for reverse path forwarding (required)
Add SSM ranges (optional)
Enable Candidate BSR (optional)
Enable Candidate RP (optional)
Change hello interval (optional)
Configure route policies (bootstrap-export, bootstrap-import, import join and register)