%% You should probably cite rfc7796 instead of this I-D.
@techreport{ietf-l2vpn-vpls-pe-etree-11,
    number =    {draft-ietf-l2vpn-vpls-pe-etree-11},
    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-l2vpn-vpls-pe-etree/11/},
    author =    {Yuanlong Jiang and Lucy Yong and Manuel Paul},
    title =     {{Ethernet-Tree (E-Tree) Support in Virtual Private LAN Service (VPLS)}},
    pagetotal = 26,
    year =      2015,
    month =     dec,
    day =       17,
    abstract =  {This document specifies a generic Virtual Private LAN Service (VPLS) solution, which uses VLANs to indicate root or leaf traffic to support Ethernet-Tree (E-Tree) services. A VPLS Provider Edge (PE) model is illustrated as an example for the solution. In the solution, E-Tree VPLS PEs are interconnected by Pseudowires (PWs), which carry the VLAN indicating the E-Tree attribute. The MAC address-based Ethernet forwarding engine and the PW work in the same way as specified in RFC 4762 and RFC 4448, respectively. A signaling mechanism is described to support E-Tree capability and VLAN mapping negotiation.},
}