usdPimMRouteNextHopJoinTypeSSRP
1.3.6.1.4.1.4874.2.2.43.1.1.13.1.9
This object indicates whether or not the interface was added as
a result of receiving <*, *, RP> join in case of <*, *, RP> entry
OR inherited as outgoing interface from corresponding <*, *, RP>
entry in case of <*, G> entry.