%% You should probably cite draft-xuclad-spring-sr-service-chaining instead of this I-D.
@techreport{xu-clad-spring-sr-service-chaining-00,
    number =    {draft-xu-clad-spring-sr-service-chaining-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-xu-clad-spring-sr-service-chaining/00/},
    author =    {Francois Clad and Xiaohu Xu and Clarence Filsfils and Daniel Bernier and Bruno Decraene and Chaitanya Yadlapalli and Wim Henderickx and Stefano Salsano and Shaowen Ma},
    title =     {{Segment Routing for Service Chaining}},
    pagetotal = 35,
    year =      2017,
    month =     dec,
    day =       22,
    abstract =  {This document defines data plane functionality required to implement service segments and achieve service chaining in SR-enabled MPLS and IP networks, as described in the Segment Routing architecture.},
}