%% You should probably cite rfc3070 instead of this I-D.
@techreport{ietf-l2tpext-fr-01,
    number =    {draft-ietf-l2tpext-fr-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-ietf-l2tpext-fr/01/},
    author =    {Suhail Nanji and Rohit verma and Rene Tio and Vipin Rawat},
    title =     {{Layer Two Tunneling Protocol (L2TP) over Frame Relay}},
    pagetotal = 7,
    year =      2000,
    month =     nov,
    day =       28,
    abstract =  {This document describes how L2TP is implemented over Frame Relay Permanent Virtual Circuits (PVCs) and Switched Virtual Circuits (SVCs). {[}STANDARDS-TRACK{]}},
}