%% You should probably cite rfc2983 instead of this I-D.
@techreport{ietf-diffserv-tunnels-02,
    number =    {draft-ietf-diffserv-tunnels-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-diffserv-tunnels/02/},
    author =    {David L. Black},
    title =     {{Differentiated Services and Tunnels}},
    pagetotal = 14,
    year =      2000,
    month =     jul,
    day =       13,
    abstract =  {This document considers the interaction of Differentiated Services (diffserv) with IP tunnels of various forms. This memo provides information for the Internet community.},
}