%% You should probably cite draft-ietf-ippm-active-passive instead of this I-D.
@techreport{morton-ippm-active-passive-01,
    number =    {draft-morton-ippm-active-passive-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-morton-ippm-active-passive/01/},
    author =    {Al Morton},
    title =     {{Active and Passive Metrics and Methods (and everything in-between)}},
    pagetotal = 9,
    year =      2015,
    month =     feb,
    day =       24,
    abstract =  {This memo provides clear definitions for Active and Passive performance assessment. The construction of Metrics and Methods can be described as Active or Passive. Methods can take on some of the attributes of both, and we refer to these as Hybrid Methods.},
}