%% You should probably cite draft-ietf-trill-group-keying instead of this I-D.
@techreport{eastlake-trill-group-keying-01,
    number =    {draft-eastlake-trill-group-keying-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-eastlake-trill-group-keying/01/},
    author =    {Donald E. Eastlake 3rd},
    title =     {{TRILL: Group Keying}},
    pagetotal = 27,
    year =      2016,
    month =     dec,
    day =       29,
    abstract =  {This document specifies a general group keying protocol. It also provides use profiles for the application of this group keying protocol to multi-destination TRILL Extended RBridge Channel message security and TRILL over IP packet security.},
}