%% You should probably cite draft-ietf-trill-rbridge-options instead of this I-D.
@techreport{eastlake-trill-rbridge-options-04,
    number =    {draft-eastlake-trill-rbridge-options-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-eastlake-trill-rbridge-options/04/},
    author =    {Donald E. Eastlake 3rd},
    title =     {{Rbridges: TRILL Header Options}},
    pagetotal = 17,
    year =      2009,
    month =     sep,
    day =       30,
    abstract =  {The TRILL base protocol specification, draft-ietf-trill-rbridge- protocol-13.txt, specifies minimal hooks for options. This draft specifies the format for options and an initial set of options.},
}