%% You should probably cite rfc8159 instead of this I-D.
@techreport{ietf-l2tpext-keyed-ipv6-tunnel-07,
    number =    {draft-ietf-l2tpext-keyed-ipv6-tunnel-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-ietf-l2tpext-keyed-ipv6-tunnel/07/},
    author =    {Maciek Konstantynowicz and Giles Heron and Rainer Schatzmayr and Wim Henderickx},
    title =     {{Keyed IPv6 Tunnel}},
    pagetotal = 12,
    year =      2016,
    month =     oct,
    day =       14,
    abstract =  {This document describes a tunnel encapsulation for Ethernet over IPv6 with a mandatory 64-bit cookie for connecting Layer 2 (L2) Ethernet attachment circuits identified by IPv6 addresses. The encapsulation is based on the Layer 2 Tunneling Protocol Version 3 (L2TPv3) over IP and does not use the L2TPv3 control plane.},
}