%% You should probably cite rfc7902 instead of this I-D.
@techreport{ietf-bess-pta-flags-01,
    number =    {draft-ietf-bess-pta-flags-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-ietf-bess-pta-flags/01/},
    author =    {Eric C. Rosen and Thomas Morin},
    title =     {{Registry and Extensions for P-Multicast Service Interface Tunnel Attribute Flags}},
    pagetotal = 5,
    year =      2015,
    month =     aug,
    day =       6,
    abstract =  {RFC6514 defines the "P-Multicast Service Interface Tunnel (PMSI Tunnel) attribute". This attribute contains an octet of "flags". Only one flag is defined in that RFC, but there is now a need to define additional flags. Since the RFC did not create a registry for the assignment of flag bits, this document updates the RFC by creating a registry for that purpose. This document also defines a new BGP Extended Community, "Additional PMSI Tunnel Attribute Flags", that can be used to carry additional flags for the PMSI Tunnel attribute.},
}