%% You should probably cite rfc8319 instead of this I-D.
@techreport{ietf-6man-maxra-03,
    number =    {draft-ietf-6man-maxra-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-6man-maxra/03/},
    author =    {Suresh Krishnan and Jouni Korhonen and Samita Chakrabarti and Erik Nordmark and Andrew Yourtchenko},
    title =     {{Support for adjustable maximum router lifetimes per-link}},
    pagetotal = 6,
    year =      2017,
    month =     jul,
    day =       3,
    abstract =  {The neighbor discovery protocol specifies the maximum time allowed between sending unsolicited multicast Router Advertisements from a router interface as well as the maximum router lifetime. It also allows the limits to be overridden by link-layer specific documents. This document allows for overriding these values on a per-link basis.},
}