%% You should probably cite rfc8503 instead of this I-D.
@techreport{ietf-bess-mvpn-mib-12,
    number =    {draft-ietf-bess-mvpn-mib-12},
    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-bess-mvpn-mib/12/},
    author =    {Hiroshi Tsunoda},
    title =     {{BGP/MPLS Layer 3 VPN Multicast Management Information Base}},
    pagetotal = 57,
    year =      2018,
    month =     sep,
    day =       16,
    abstract =  {This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects to configure and/or monitor Multicast communication over IP Virtual Private Networks (VPNs) supported by the Multiprotocol Label Switching/Border Gateway Protocol (MPLS/BGP) on a Provider Edge (PE) router.},
}