%% You should probably cite draft-fang-bess-data-center-interconnect instead of this I-D.
@techreport{fang-l3vpn-data-center-interconnect-03,
    number =    {draft-fang-l3vpn-data-center-interconnect-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-fang-l3vpn-data-center-interconnect/03/},
    author =    {Luyuan Fang and Rex Fernando and Dhananjaya Rao},
    title =     {{BGP/MPLS IP VPN Data Center Interconnect}},
    pagetotal = 13,
    year =      2014,
    month =     jul,
    day =       4,
    abstract =  {This document discusses two categories of inter-connections of BGP/MPLS IP VPN and Data Center (DC) overlay networks. In the first category, DC overlay virtual network is built with BGP/MPLS IP VPN (IP VPN) technologies, and the inter-connection of IP VPN in the DC either to IP VPN in other DCs or to IP VPN in the WAN enables end-to- end IP VPN connectivity. In the second category, DC overlay network uses non IP VPN overlay technologies, and the inter-connection of any overlay virtual network in the DC to IP VPN in the WAN provides end user connectivity through stitching of different overlay technologies.},
}