%% You should probably cite rfc2735 instead of this I-D.
@techreport{ietf-ion-nhrp-vpn-03,
    number =    {draft-ietf-ion-nhrp-vpn-03},
    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-ion-nhrp-vpn/03/},
    author =    {Bernhard H. Petri and Barbara A. Fox},
    title =     {{NHRP Support for Virtual Private Networks}},
    pagetotal = 12,
    year =      1999,
    month =     oct,
    day =       25,
    abstract =  {The NBMA Next Hop Resolution Protocol (NHRP) is used to determine the NBMA subnetwork addresses of the "NBMA next hop" towards a public internetworking layer address. This document describes the enhancements necessary to enable NHRP to perform the same function for private internetworking layer addresses available within the framework of a Virtual Private Network (VPN) service on a shared NBMA network. {[}STANDARDS-TRACK{]}},
}