%% You should probably cite draft-ietf-mpls-sfl-control instead of this I-D.
@techreport{bryant-mpls-sfl-control-01,
    number =    {draft-bryant-mpls-sfl-control-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-bryant-mpls-sfl-control/01/},
    author =    {Stewart Bryant and George Swallow and Siva Sivabalan},
    title =     {{MPLS Flow Identification Considerations}},
    pagetotal = 11,
    year =      2017,
    month =     mar,
    day =       11,
    abstract =  {In draft-bryant-mpls-sfl-framework the concept of MPLS synonymous flow labels (SFL) was introduced. This document describes a control protocol that runs over an associated control header to request, withdrawn and extend the lifetime of such labels.},
}