wfIpv6AddrType 1.3.6.1.4.1.18.3.5.3.16.1.1.4.1.4

The type of address. Note that 'stateless(2)' refers to an address that was statelessly autoconfigured; 'stateful(3)' refers to a address which was acquired by via a stateful protocol (e.g. DHCPv6, manual configuration)