%% You should probably cite draft-ietf-bess-evpn-irb-mcast instead of this I-D.
@techreport{lin-bess-evpn-irb-mcast-01,
    number =    {draft-lin-bess-evpn-irb-mcast-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-lin-bess-evpn-irb-mcast/01/},
    author =    {Wen Lin and Zhaohui (Jeffrey) Zhang and John Drake},
    title =     {{EVPN Inter-subnet Multicast Forwarding}},
    pagetotal = 8,
    year =      2015,
    month =     may,
    day =       8,
    abstract =  {This document describes inter-subnet multicast forwarding procedures for Ethernet VPNs (EVPN).},
}