%% You should probably cite rfc4636 instead of this I-D.
@techreport{ietf-mip4-faerr-02,
    number =    {draft-ietf-mip4-faerr-02},
    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-mip4-faerr/02/},
    author =    {Charles E. Perkins},
    title =     {{Foreign Agent Error Extension for Mobile IPv4}},
    pagetotal = 6,
    year =      2005,
    month =     sep,
    day =       21,
    abstract =  {This document specifies a new extension for use by Foreign Agents operating Mobile IP for IPv4. Currently, a foreign agent cannot supply status information without destroying the ability for a mobile node to verify authentication data supplied by the home agent. The new extension solves this problem by making a better place for the foreign agent to provide its status information to the mobile node. {[}STANDARDS-TRACK{]}},
}