%% You should probably cite draft-ietf-l2tpext-sbfd-discriminator instead of this I-D.
@techreport{gp-l2tpext-sbfd-discriminator-00,
    number =    {draft-gp-l2tpext-sbfd-discriminator-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-gp-l2tpext-sbfd-discriminator/00/},
    author =    {Vengada Prasad Govindan and Carlos Pignataro},
    title =     {{Advertising S-BFD Discriminators in L2TPv3}},
    pagetotal = 5,
    year =      2015,
    month =     mar,
    day =       5,
    abstract =  {This document defines a new AVP for advertising one or more S-BFD Discriminators using the L2TPv3 Control Protocol AVP.},
}