%% You should probably cite draft-ietf-dhc-host-gen-id instead of this I-D.
@techreport{xia-dhc-host-gen-id-04,
    number =    {draft-xia-dhc-host-gen-id-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-xia-dhc-host-gen-id/04/},
    author =    {Frank Xia and Behcet Sarikaya and Sheng Jiang},
    title =     {{Prefix Assignment in DHCPv6}},
    pagetotal = 10,
    year =      2011,
    month =     apr,
    day =       24,
    abstract =  {This document describes a procedure for configuring hosts' IPv6 address which the prefix is assigned from a DHCPv6 server through DHCPv6 protocol while the interface identifiers are independently generated by the hosts. The method is applicable to Cryptographically Generated Addresses (CGA), and other host-generated IPv6 addresses.},
}