%% You should probably cite rfc3440 instead of this I-D.
@techreport{ietf-adslmib-adslext-12,
    number =    {draft-ietf-adslmib-adslext-12},
    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-adslmib-adslext/12/},
    author =    {Faye Ly and Gregory Bathrick},
    title =     {{Definitions of Extension Managed Objects for Asymmetric Digital Subscriber Lines}},
    pagetotal = 36,
    year =      2002,
    month =     sep,
    day =       23,
    abstract =  {This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes additional managed objects used for managing Asymmetric Digital Subscriber Line (ADSL) interfaces not covered by the ADSL Line MIB (RFC 2662). {[}STANDARDS-TRACK{]}},
}