Path computation element: Difference between revisions

Revision as of 15:20, 25 June 2017

Revision as of 16:27, 18 July 2017

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Since the early days, the PCE architecture has evolved considerably to encompass more sophisticated concepts and allow application to more complicated network scenarios. This evolution includes Hierarchical PCE (H-PCE)<ref name=H-PCE>RFC 6805 [http://www.rfc-editor.org/rfc/rfc6805.txt "Hierarchical PCE"]</ref> and both Stateful and Active PCE.<ref name=Stateful>RFC 7399[http://www.rfc-editor.org/rfc/rfc7399.txt "Unanswered Questions in the Path Computation Element Architecture"]</ref>

A potential deployment of PCE separates the computation element from the client (the PCC) that request computation services. communicationsCommunications between the PCE and PCC are achieved using the Path Computation Element Communication Protocol (PCEP)<ref name=PCEP>RFC 5440 [http://www.rfc-editor.org/rfc/rfc5440.txt "Path Computation Element Communications Protocol"]</ref> which runs over the [[Transmission Control Protocol]] (TCP).

As the architecture has evolved, new protocol extensions have been developed to add functionality to support new applications and the new architectural elements. These developments are tracked by the PACE project<ref name=PACE>PACE [http://www.ict-pace.net/ "PACE: Next Steps in PAth Computation Element (PCE) Architectures"]</ref> which is funded by the [[European Union]]'s Seventh Framework Programme for research, technological development and demonstration under grant agreement no. 619712.