%% You should probably cite draft-xu-lsr-isis-service-function-adv instead of this I-D.
@techreport{xu-isis-service-function-adv-04,
    number =    {draft-xu-isis-service-function-adv-04},
    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-isis-service-function-adv/04/},
    author =    {Xiaohu Xu and Nan Wu and Himanshu C. Shah and Luis M. Contreras},
    title =     {{Advertising Service Functions Using IS-IS}},
    pagetotal = 6,
    year =      2016,
    month =     oct,
    day =       31,
    abstract =  {Source Packet Routing in Networking (SPRING) WG is developing an MPLS source routing mechanism. This MPLS source routing mechanism can be leveraged to realize the service path layer functionality of the service function chaining (i.e., steering the selected traffic through a particular service function path) by encoding the service function path information as an MPLS label stack. This document describes how to advertise service functions and their corresponding attributes (e.g.,segment ID) using IS-IS.},
}