%% You should probably cite draft-ietf-softwire-lw4over6 instead of this I-D.
@techreport{cui-softwire-b4-translated-ds-lite-07,
    number =    {draft-cui-softwire-b4-translated-ds-lite-07},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-cui-softwire-b4-translated-ds-lite/07/},
    author =    {Yong Cui and Qiong Sun and Mohamed Boucadair and Tina Tsou (Ting ZOU) and Yiu Lee and Ian Farrer},
    title =     {{Lightweight 4over6: An Extension to the DS-Lite Architecture}},
    pagetotal = 16,
    year =      2012,
    month =     jul,
    day =       13,
    abstract =  {This document specifies an extension to DS-Lite called Lightweight 4over6. This mechanism moves the translation function from the tunnel concentrator (AFTR) to initiators (B4s), and hence reduces the mapping scale on the concentrator to a per-subscriber level. To delegate the NAPT function to the initiators, port-restricted IPv4 addresses are allocated to the initiators.},
}