%% You should probably cite draft-ietf-pim-lasthop-threats instead of this I-D.
@techreport{savola-pim-lasthop-threats-02,
    number =    {draft-savola-pim-lasthop-threats-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-savola-pim-lasthop-threats/02/},
    author =    {James Lingard and Pekka Savola},
    title =     {{Last-hop Threats to Protocol Independent Multicast (PIM)}},
    pagetotal = 11,
    year =      2006,
    month =     jun,
    day =       15,
    abstract =  {An analysis of security threats has been done for some parts of the multicast infrastructure, but the threats specific to the last-hop ("Local Area Network") attacks by hosts on the PIM routing protocol have not been well described in the past. This memo aims to fill that gap.},
}