%% You should probably cite rfc2460 instead of this I-D.
@techreport{ietf-ipngwg-ipv6-spec-v2-01,
    number =    {draft-ietf-ipngwg-ipv6-spec-v2-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-ipngwg-ipv6-spec-v2/01/},
    author =    {Bob Hinden and Dr. Steve E. Deering},
    title =     {{Internet Protocol, Version 6 (IPv6) Specification}},
    pagetotal = 39,
    year =      1998,
    month =     apr,
    day =       7,
    abstract =  {This document specifies version 6 of the Internet Protocol (IPv6), also sometimes referred to as IP Next Generation or IPng. {[}STANDARDS-TRACK{]}},
}