%% You should probably cite rfc2794 instead of this I-D.
@techreport{ietf-mobileip-mn-nai-06,
    number =    {draft-ietf-mobileip-mn-nai-06},
    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-mobileip-mn-nai/06/},
    author =    {Pat R. Calhoun and Charles E. Perkins},
    title =     {{Mobile IP Network Access Identifier Extension for IPv4}},
    pagetotal = 9,
    year =      2000,
    month =     jan,
    day =       5,
    abstract =  {Our proposal defines a way for the mobile node to identify itself, by including the NAI along with the Mobile IP Registration Request. This memo also updates RFC 2290 which specifies the Mobile-IPv4 Configuration option for IPCP, by allowing the Mobile Node's Home Address field of this option to be zero. {[}STANDARDS-TRACK{]}},
}