R4
/ \
R1 R3
| |
R2 R5
| |
--------- <----- Ethernet
|
R6
All interfaces have pim sparse-dense mode enabled.
All routers have R4 configured as static RP (4.4.4.4).
R6 has a igmp join-group 239.0.0.6 on its ethernet interface.
After R5 sends a ping to 239.0.0.6, R6 does reply.
However this is how the mroute tables look on R5 and R2:
R5#show 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, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.0.0.6), 00:35:13/stopped, RP 4.4.4.4, flags: SP
Incoming interface: Serial1/0, RPF nbr 172.12.35.3
Outgoing interface list: Null
(172.12.25.5, 239.0.0.6), 00:00:14/00:02:51, flags: PT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
(*, 224.0.1.40), 00:49:30/00:02:16, RP 4.4.4.4, flags: SJPL
Incoming interface: Serial1/0, RPF nbr 172.12.35.3
Outgoing interface list: Null
R2#show 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, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.0.0.6), 00:35:16/stopped, RP 4.4.4.4, flags: SP
Incoming interface: Serial1/0, RPF nbr 172.12.12.1
Outgoing interface list: Null
(172.12.25.5, 239.0.0.6), 00:00:17/00:02:44, flags: PT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
(*, 224.0.1.40), 00:51:48/00:02:14, RP 4.4.4.4, flags: SJPCL
Incoming interface: Serial1/0, RPF nbr 172.12.12.1
Outgoing interface list: Null
How can R6 get the ping request when all the outgoing interface lists towards R6 are NULL?
Thanks,
-B
