%% You should probably cite rfc7432 instead of this I-D.
@techreport{ietf-l2vpn-evpn-00,
    number =    {draft-ietf-l2vpn-evpn-00},
    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-evpn/00/},
    author =    {Rahul Aggarwal and Ali Sajassi and Wim Henderickx and Dr. Nabil N. Bitar and Ravi Shekhar and John Drake},
    title =     {{BGP MPLS Based Ethernet VPN}},
    pagetotal = 39,
    year =      2012,
    month =     feb,
    day =       27,
    abstract =  {This document describes procedures for BGP MPLS based Ethernet VPNs (E-VPN).},
}