@misc{rfc8685,
    series =    {Request for Comments},
    number =    8685,
    howpublished =  {RFC 8685},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC8685},
    url =       {https://www.rfc-editor.org/info/rfc8685},
    author =    {Fatai Zhang and Quintin Zhao and Oscar Gonzalez de Dios and R. Casellas and Daniel King},
    title =     {{Path Computation Element Communication Protocol (PCEP) Extensions for the Hierarchical Path Computation Element (H-PCE) Architecture}},
    pagetotal = 27,
    year =      2019,
    month =     dec,
    abstract =  {The Hierarchical Path Computation Element (H-PCE) architecture is defined in RFC 6805. It provides a mechanism to derive an optimum end-to-end path in a multi-domain environment by using a hierarchical relationship between domains to select the optimum sequence of domains and optimum paths across those domains. This document defines extensions to the Path Computation Element Communication Protocol (PCEP) to support H-PCE procedures.},
}