%% You should probably cite rfc8300 instead of this I-D.
@techreport{ietf-sfc-nsh-28,
    number =    {draft-ietf-sfc-nsh-28},
    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-sfc-nsh/28/},
    author =    {Paul Quinn and Uri Elzur and Carlos Pignataro},
    title =     {{Network Service Header (NSH)}},
    pagetotal = 40,
    year =      2017,
    month =     nov,
    day =       3,
    abstract =  {This document describes a Network Service Header (NSH) imposed on packets or frames to realize Service Function Paths (SFPs). The NSH also provides a mechanism for metadata exchange along the instantiated service paths. The NSH is the Service Function Chaining (SFC) encapsulation required to support the SFC architecture (defined in RFC 7665).},
}