%% You should probably cite rfc6674 instead of this I-D.
@techreport{ietf-softwire-gateway-init-ds-lite-06,
    number =    {draft-ietf-softwire-gateway-init-ds-lite-06},
    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-softwire-gateway-init-ds-lite/06/},
    author =    {David Ward and Frank Brockners and Sebastian Speicher and Sri Gundavelli},
    title =     {{Gateway Initiated Dual-Stack Lite Deployment}},
    pagetotal = 15,
    year =      2011,
    month =     dec,
    day =       17,
    abstract =  {Gateway-Initiated Dual-Stack lite (GI-DS-lite) is a variant of Dual- Stack lite (DS-lite) applicable to certain tunnel-based access architectures. GI-DS-lite extends existing access tunnels beyond the access gateway to an IPv4-IPv4 NAT using softwires with an embedded context identifier that uniquely identifies the end-system the tunneled packets belong to. The access gateway determines which portion of the traffic requires NAT using local policies and sends/ receives this portion to/from this softwire.},
}