%% You should probably cite draft-dhjain-bess-bgp-l3vpn-yang instead of this I-D.
@techreport{keyupate-bess-bgp-l3vpn-cfg-02,
    number =    {draft-keyupate-bess-bgp-l3vpn-cfg-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-keyupate-bess-bgp-l3vpn-cfg/02/},
    author =    {Keyur Patel and Dhanendra Jain},
    title =     {{Yang Data Model for BGP/MPLS L3 VPNs}},
    pagetotal = 21,
    year =      2015,
    month =     dec,
    day =       28,
    abstract =  {This document defines a YANG data model that can be used to configure and manage BGP Layer 3 VPNs.},
}