%% You should probably cite draft-ietf-trill-group-keying instead of this I-D.
@techreport{eastlake-trill-group-keying-00,
    number =    {draft-eastlake-trill-group-keying-00},
    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-group-keying/00/},
    author =    {Donald E. Eastlake 3rd},
    title =     {{TRILL: Group Keying}},
    pagetotal = 26,
    year =      2016,
    month =     jul,
    day =       8,
    abstract =  {This document specifies a general group keying protocol and provides a use profile for its application to TRILL Extended RBridge Channel message security.},
}