[mpls] RFC 8577 on Signaling RSVP-TE Tunnels on a Shared MPLS Forwarding Plane
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Subject: [mpls] RFC 8577 on Signaling RSVP-TE Tunnels on a Shared MPLS Forwarding Plane
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A new Request for Comments is now available in online RFC libraries. RFC 8577 Title: Signaling RSVP-TE Tunnels on a Shared MPLS Forwarding Plane Author: H. Sitaraman, V. Beeram, T. Parikh, T. Saad Status: Standards Track Stream: IETF Date: April 2019 Mailbox: harish.ietf@gmail.com, vbeeram@juniper.net, tejal.parikh@verizon.com, tsaad.net@gmail.com Pages: 24 Characters: 50113 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-mpls-rsvp-shared-labels-09.txt URL: https://www.rfc-editor.org/info/rfc8577 DOI: 10.17487/RFC8577 As the scale of MPLS RSVP-TE networks has grown, the number of Label Switched Paths (LSPs) supported by individual network elements has increased. Various implementation recommendations have been proposed to manage the resulting increase in the amount of control-plane state information. However, those changes have had no effect on the number of labels that a transit Label Switching Router (LSR) has to support in the forwarding plane. That number is governed by the number of LSPs transiting or terminated at the LSR and is directly related to the total LSP state in the control plane. This document defines a mechanism to prevent the maximum size of the label space limit on an LSR from being a constraint to control-plane scaling on that node. It introduces the notion of preinstalled 'per-TE link labels' that can be shared by MPLS RSVP-TE LSPs that traverse these TE links. This approach significantly reduces the forwarding-plane state required to support a large number of LSPs. This couples the feature benefits of the RSVP-TE control plane with the simplicity of the Segment Routing (SR) MPLS forwarding plane. This document is a product of the Multiprotocol Label Switching Working Group of the IETF. This is now a Proposed Standard. STANDARDS TRACK: This document specifies an Internet Standards Track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the Official Internet Protocol Standards (https://www.rfc-editor.org/standards) for the standardization state and status of this protocol. 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