This read-create value, ranging 0 to 255, sets the priority this Candidate-RP advertises in its Candidate-RP-Advertisements, where numerically lower values mean higher priority and zero is the highest. It lets an admin influence which of several candidate RPs the BSR selects to serve a given multicast group range. For example, an admin wanting a particular router to win RP election over others with the default of 192 would lower this value, such as to 10, on the preferred router.