vRtrPimNgSSMGroupMask 1.3.6.1.4.1.6527.3.1.2.50.1.19.1.3

The value of vRtrPimNgSSMGroupMask indicates the mask which is combined with vRtrPimNgSSMGroupAddress to get the range of multicast group addresses to be used for Source Specific Multicast(SSM).