This object contains an unused value for fsDhcp6SrvClientIndex in the fsDhcp6SrvClientTable, 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 fsDhcp6SrvClientTable with index 2,5,6,8. Then GET operation of fsDhcp6SrvClientTableNextIndex object will return the value 1 as next unused Index.