usdPimMRouteSenderDRAddr 1.3.6.1.4.1.4874.2.2.43.1.1.12.1.15

The address of the designated router on the sender's subnet in case of <S, G> entries. The sender designated router register encapsulates data to RP. Set to 0.0.0.0 for <*, G> and <*, *, RP> entries.