S6#sh run int fa 0/2
Building configuration...

Current configuration : 150 bytes
!
interface FastEthernet0/2
 no switchport
 ip address 180.40.7.97 255.255.255.224
 ip pim sparse-dense-mode
 ip igmp join-group 225.225.225.255
end

S6#
RACK18AS>4
[Resuming connection 4 to r4 ... ]

R4#ping 225.225.225.255

Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 225.225.225.255, timeout is 2 seconds:

Reply to request 0 from 180.40.7.97, 44 ms
R4#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, Z - Multicast Tunnel
       Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.39), 01:47:41/stopped, RP 0.0.0.0, flags: D
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    FastEthernet0/0, Forward/Dense, 01:47:41/00:00:00

(180.40.7.129, 224.0.1.39), 00:00:40/00:02:19, flags: PT
  Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(*, 224.0.1.40), 02:09:05/00:02:10, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    FastEthernet0/0, Forward/Dense, 02:09:06/00:00:00

R4#
RACK18AS>3
[Resuming connection 3 to r3 ... ]

R3#sh ip pim rp
Group: 225.225.225.255, RP: 180.40.7.129, v2, v1, next RP-reachable in 00:01:03
R3#