%% You should probably cite draft-ietf-l3vpn-mvpn-mib instead of this I-D.
@techreport{zzhang-mvpn-mib-00,
    number =    {draft-zzhang-mvpn-mib-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-zzhang-mvpn-mib/00/},
    author =    {Saud Asif and Andy Green and Sameer Gulrajani and Pradeep Jain and Zhaohui (Jeffrey) Zhang},
    title =     {{MPLS/BGP Layer 3 VPN Multicast Management Information Base}},
    pagetotal = 30,
    year =      2012,
    month =     mar,
    day =       5,
    abstract =  {This memo defines an 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 in MPLS/BGP-based Layer-3 VPN (MVPN) on an MVPN router.},
}