This read-create IpAddress specifies the IP address of the neighbor router on the path toward the multicast source (RPF neighbor) for this static multicast route entry. Admins configure this to manually pin the reverse-path-forwarding next hop for a given multicast source, overriding what the unicast routing table would otherwise select. For example, an admin sets tpStaticMrouteRpfNeigbor to a specific upstream router's address to force multicast traffic from a given source to be accepted via that particular neighbor.