%% You should probably cite draft-ietf-trill-multilevel-single-nickname instead of this I-D.
@techreport{zhang-trill-multilevel-single-nickname-00,
    number =    {draft-zhang-trill-multilevel-single-nickname-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-zhang-trill-multilevel-single-nickname/00/},
    author =    {Mingui Zhang and Donald E. Eastlake 3rd and Radia Perlman},
    title =     {{Single Area Border RBridge Nickname for TRILL Multilevel}},
    pagetotal = 9,
    year =      2015,
    month =     mar,
    day =       9,
    abstract =  {A major issue in multilevel TRILL is how to manage RBridge nicknames. In this document, the area border RBridge uses a single nickname in both Level 1 and Level 2. RBridges in Level 2 must obtain unique nicknames but RBridges in different Level 1 areas may have the same nicknames.},
}