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The source reaches two receiver branches through the rendezvous point.
Confirm unicast reachability, then send a multicast ping before either receiver joins.
Add the group membership on the east receiver.
The rendezvous point forwards toward the east branch.
Send another multicast ping to verify that the joined group responds.
Join the same group on the west receiver.
The multicast route now lists both outgoing interfaces.
Remove the membership on the east receiver.
The west branch remains in the outgoing list and multicast still responds.
Remove the last membership and check that multicast no longer responds.
Join the east receiver again to restore the outgoing path.
Verify the group responds again after the receiver rejoins.