WB Vol.1 Multicast - 8.4 PIM Sparse-Dense Mode

R6 (FHR)

(*, 224.0.1.40), 00:33:08/00:02:26, RP 150.7.5.5, flags: SJPCL
  Incoming interface: FastEthernet0/0.146, RPF nbr 155.7.146.4
  Outgoing interface list: Null

R4

(*, 239.0.0.1), 00:00:48/stopped, RP 0.0.0.0, flags: D
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Serial0/1/0, Forward/Sparse-Dense, 00:00:48/00:00:00
    FastEthernet0/1, Forward/Sparse-Dense, 00:00:48/00:00:00

(155.7.146.6, 239.0.0.1), 00:00:48/00:02:16, flags: T
  Incoming interface: FastEthernet0/1, RPF nbr 155.7.146.6
  Outgoing interface list:
    Serial0/1/0, Forward/Sparse-Dense, 00:00:48/00:00:00

R5 (RP for 224.10.10.10, but no RP for 239.0.0.1. It's dense mode group)

(*, 239.0.0.1), 00:00:51/stopped, RP 0.0.0.0, flags: D
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Serial0/1/0, Forward/Sparse-Dense, 00:00:51/00:00:00
    FastEthernet0/0, Forward/Sparse-Dense, 00:00:51/00:00:00

(155.7.146.6, 239.0.0.1), 00:00:51/00:02:14, flags: T
  Incoming interface: Serial0/1/0, RPF nbr 155.7.45.4
  Outgoing interface list:
    FastEthernet0/0, Forward/Sparse-Dense, 00:00:51/00:00:00

SW2

(*, 239.0.0.1), 00:01:10/stopped, RP 0.0.0.0, flags: D
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Port-channel1, Forward/Sparse-Dense, 00:01:10/00:00:00
    Vlan58, Forward/Sparse-Dense, 00:01:10/00:00:00

(155.7.146.6, 239.0.0.1), 00:01:10/00:02:06, flags: T
  Incoming interface: Vlan58, RPF nbr 155.7.58.5
  Outgoing interface list:
    Port-channel1, Forward/Sparse-Dense, 00:01:10/00:00:00

SW4 (LHR)

(*, 239.0.0.1), 00:02:32/stopped, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan10, Forward/Sparse-Dense, 00:02:32/00:00:00
    Port-channel1, Forward/Sparse-Dense, 00:02:32/00:00:00

(155.7.146.6, 239.0.0.1), 00:01:04/00:01:58, flags: LT
  Incoming interface: Port-channel1, RPF nbr 155.7.108.8
  Outgoing interface list:
    Vlan10, Forward/Sparse-Dense, 00:01:04/00:00:00, H