The IP address which when combined with the corresponding
value of hwPimStarGRpfRoutePrefixLength identifies the route
used to find the RPF interface towards the RP. The
InetAddressType is given by the hwPimStarGRpfNextHopType
object.
This address object is only significant up to
hwPimStarGRpfRoutePrefixLength bits. The remainder of the
address bits are zero.