the task states that SW2 should be responsible for the group tp RP mapping; the network is running in sparse mode. The SG configured SW2 to use loopback 0 as the interface with the following command:
ip pim send-rp-discovery lo0 scope 16
I use the following command without specifying any interface and it worked out fine:
ip pim send-rp-discovery scope 16
My thought is since the task did not specify anything in the line of "use SW2's most reliable interface for RP mappings" I did not specify it.
Can someone please explain the difference between the two commands and what's best to use as far as the CCIE lab goes.