%% You should probably cite draft-boucadair-sfc-requirements instead of this I-D.
@techreport{boucadair-chaining-requirements-01,
    number =    {draft-boucadair-chaining-requirements-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-boucadair-chaining-requirements/01/},
    author =    {Mohamed Boucadair and Christian Jacquenet and Yuanlong Jiang and Li Hongyu and Ron Parker},
    title =     {{Requirements for Service Function Chaining}},
    pagetotal = 10,
    year =      2013,
    month =     aug,
    day =       22,
    abstract =  {This document identifies the requirements for the Service Function Chaining.},
}