%% You should probably cite rfc6888 instead of this I-D.
@techreport{ietf-behave-lsn-requirements-09,
    number =    {draft-ietf-behave-lsn-requirements-09},
    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-behave-lsn-requirements/09/},
    author =    {Simon Perreault and Ikuhei Yamagata and Shin Miyakawa and Akira Nakagawa and Hiroyuki Ashida},
    title =     {{Common requirements for Carrier Grade NATs (CGNs)}},
    pagetotal = 17,
    year =      2012,
    month =     aug,
    day =       9,
    abstract =  {This document defines common requirements for Carrier-Grade NAT (CGN). It updates RFC 4787.},
}