Multicast Tunnel RPF Failure

Lessons Discussion
6

Thanks for your explanation.
I understand better the use of ip mroute.

But I still have 2 questions:

  1. In the case you have R1-R2-R3*(RP)-R4-R5, with senders and receivers in all R%, would you have to configure ip mroute in R1,R2,R4 and R5?

In the case you have many senders and receivers in both sides R1 and R2, and a tunnel between them, would you recommend to implement pim sparse-dense mode or bidir multicat implementation?

I have in the lab 2 L3 in this config:
SW-R1-R2-SW2
I have R1 and R2 with pim sparse-dense-mode + ip routing
I used:

ip routing
ip multicast-routing distributed

router eigrp 100
 network 0.0.0.0 0.0.0.0
 exit

I didn’t use ip mroute. And even having senders and receivers in both sides they were communicating well in multicast.
why didn’t I need ip mroute?