%% You should probably cite draft-ietf-pim-mtid instead of this I-D.
@techreport{cai-pim-mtid-00,
    number =    {draft-cai-pim-mtid-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-cai-pim-mtid/00/},
    author =    {Yiqun Cai and Heidi Ou},
    title =     {{PIM Multi-Topology ID (MT-ID) Join-Attribute}},
    pagetotal = 10,
    year =      2008,
    month =     oct,
    day =       27,
    abstract =  {This document introduces a new type of PIM Join Attribute that extends PIM signaling to identify a topology that should be used when constructing a particular multicast distribution tree.},
}