[Pce] RFC 8751 on Hierarchical Stateful Path Computation Element (PCE)
rfc-editor@rfc-editor.org Tue, 31 March 2020 18:34 UTC
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Subject: [Pce] RFC 8751 on Hierarchical Stateful Path Computation Element (PCE)
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A new Request for Comments is now available in online RFC libraries. RFC 8751 Title: Hierarchical Stateful Path Computation Element (PCE) Author: D. Dhody, Y. Lee, D. Ceccarelli, J. Shin, D. King Status: Informational Stream: IETF Date: March 2020 Mailbox: dhruv.ietf@gmail.com, younglee.tx@gmail.com, daniele.ceccarelli@ericsson.com, jongyoon.shin@sk.com, d.king@lancaster.ac.uk Pages: 21 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-pce-stateful-hpce-15.txt URL: https://www.rfc-editor.org/info/rfc8751 DOI: 10.17487/RFC8751 A stateful Path Computation Element (PCE) maintains information on the current network state received from the Path Computation Clients (PCCs), including computed Label Switched Paths (LSPs), reserved resources within the network, and pending path computation requests. This information may then be considered when computing the path for a new traffic-engineered LSP or for any associated/dependent LSPs. The path-computation response from a PCE helps the PCC to gracefully establish the computed LSP. The Hierarchical Path Computation Element (H-PCE) architecture allows the optimum sequence of interconnected domains to be selected and network policy to be applied if applicable, via the use of a hierarchical relationship between PCEs. Combining the capabilities of stateful PCE and the hierarchical PCE would be advantageous. This document describes general considerations and use cases for the deployment of stateful, but not stateless, PCEs using the hierarchical PCE architecture. This document is a product of the Path Computation Element Working Group of the IETF. INFORMATIONAL: This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/retrieve/bulk Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC