%% You should probably cite draft-ietf-l2tpext-keyed-v6-tunnel-yang instead of this I-D.
@techreport{sun-l2tpext-keyed-v6-tunnel-yang-01,
    number =    {draft-sun-l2tpext-keyed-v6-tunnel-yang-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-sun-l2tpext-keyed-v6-tunnel-yang/01/},
    author =    {Qi Sun and Ian Farrer and Bing Liu and Giles Heron},
    title =     {{A YANG Data Model for Keyed IPv6 Tunnels}},
    pagetotal = 14,
    year =      2015,
    month =     jul,
    day =       6,
    abstract =  {This document defines a YANG data model for the configuration and management of Keyed IPv6 tunnels. The data model includes configuration data and state data. Due to the stateless nature of keyed IPv6 tunnels, a model for NETCONF notifications is not necessary.},
}