vRtrPimNgERPGrpPrefixGrpMask 1.3.6.1.4.1.6527.3.1.2.50.1.31.1.3

The value of vRtrPimNgERPGrpPrefixGrpMask indicates the mask which is combined with the value of vRtrPimNgERPGrpPrefixGrpAddr to get the range of multicast group addresses for which RP address information can be embedded.