To show the PIM state on Router 2 and Router 3 (the upstream routers), use the show pim join extensive command:
user@router2> show pim join extensive
232.1.1.1 10.4.1.2 sparse
Upstream interface: fe-1/1/3.0
Upstream State: Local Source
Keepalive timeout: 209
Downstream Neighbors:
Interface: so-1/0/2.0
10.10.71.1 State: Join Flags: S Timeout: 209
To show the PIM state on Router 1 (the router connected to the receiver), use the show pim join extensive command:
user@router1> show pim join extensive
232.1.1.1 10.4.1.2 sparse
Upstream interface: so-1/0/2.0
Upstream State: Join to Source
Keepalive timeout: 209
Downstream Neighbors:
Interface: fe-0/2/3.0
10.3.1.1 State: Join Flags: S Timeout: Infinity