This object contains an first unused value for fsDhcp6SrvIncludePrefixIndex in the fsDhcp6SrvIncludePrefixTable, or a zero to indicate that next index does not exists. This object will give the first empty index value for example when user create the four rows of fsDhcp6SrvIncludePrefixTable with index 2,5,6,8.Then fsDhcp6SrvIncludePrefixTableNextIndex object will return the value 1 as next unused Index.