Task 5.3 - RPF Failure

Hello,

I am working on Task 5.3 and I am experiencing what I believe to RPF failure once R3 switches to a source tree.

R3's perspective:

(192.10.1.1, 225.25.25.25), 00:00:45/00:02:22, flags: LJT
Incoming interface: Serial1/0.2, RPF nbr 141.1.123.2
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 00:00:45/00:03:06

R3#sh ip route 192.10.1.1
Routing entry for 192.10.1.0/24
Known via "ospf 1", distance 110, metric 65, type inter area
Redistributing via rip
Advertised by rip metric 1
Last update from 141.1.123.1 on Serial1/0.2, 00:33:15 ago
Routing Descriptor Blocks:
* 141.1.123.1, from 150.1.1.1, 00:33:15 ago, via Serial1/0.2
Route metric is 65, traffic share count is 1


As you can see, the receiving neighbor for multicast traffic does not match the next-hop for the return traffic, thus dropping. I could switch this to OSPF p-t-mp on the hub, but that was explicitly stated not to happen in a previous task.

Does anyone else have a solution -- did you encounter this?

Thanks.

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