%% You should probably cite rfc8597 instead of this I-D.
@techreport{contreras-layered-sdn-03,
    number =    {draft-contreras-layered-sdn-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-contreras-layered-sdn/03/},
    author =    {Luis M. Contreras and Carlos J. Bernardos and Diego Lopez and Mohamed Boucadair and Paola Iovanna},
    title =     {{Cooperating Layered Architecture for Software-Defined Networking (CLAS)}},
    pagetotal = 21,
    year =      2018,
    month =     nov,
    day =       22,
    abstract =  {Software-Defined Networking (SDN) advocates for the separation of the control plane from the data plane in the network nodes and its logical centralization on one or a set of control entities. Most of the network and/or service intelligence is moved to these control entities. Typically, such an entity is seen as a compendium of interacting control functions in a vertical, tightly integrated fashion. The relocation of the control functions from a number of distributed network nodes to a logical central entity conceptually places together a number of control capabilities with different purposes. As a consequence, the existing solutions do not provide a clear separation between transport control and services that rely upon transport capabilities. This document describes an approach called Cooperating Layered Architecture for Software-Defined Networking (CLAS), wherein the control functions associated with transport are differentiated from those related to services in such a way that they can be provided and maintained independently and can follow their own evolution path.},
}