%% You should probably cite rfc7552 instead of this I-D.
@techreport{ietf-mpls-ldp-ipv6-17,
    number =    {draft-ietf-mpls-ldp-ipv6-17},
    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-mpls-ldp-ipv6/17/},
    author =    {Rajiv Asati and Carlos Pignataro and Syed Kamran Raza and Vishwas Manral and Rajiv Papneja},
    title =     {{Updates to LDP for IPv6}},
    pagetotal = 24,
    year =      2015,
    month =     feb,
    day =       25,
    abstract =  {The Label Distribution Protocol (LDP) specification defines procedures to exchange label bindings over either IPv4 or IPv6 networks, or both. This document corrects and clarifies the LDP behavior when an IPv6 network is used (with or without IPv4). This document updates RFCs 5036 and 6720.},
}