[mpls] I-D Action: draft-ietf-mpls-rsvp-shared-labels-00.txt
internet-drafts@ietf.org Tue, 19 December 2017 06:08 UTC
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Subject: [mpls] I-D Action: draft-ietf-mpls-rsvp-shared-labels-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Multiprotocol Label Switching WG of the IETF. Title : Signaling RSVP-TE tunnels on a shared MPLS forwarding plane Authors : Harish Sitaraman Vishnu Pavan Beeram Tejal Parikh Tarek Saad Filename : draft-ietf-mpls-rsvp-shared-labels-00.txt Pages : 21 Date : 2017-12-18 Abstract: As the scale of MPLS RSVP-TE networks has grown, so 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 control plane state. 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. That is, it allows many more LSPs to be supported than there are forwarding plane labels available. This work introduces the notion of pre-installed 'per Traffic Engineering (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 MPLS forwarding plane. This document also introduces the ability to mix different types of label operations along the path of an LSP, thereby allowing the ingress router or an external controller to influence how to optimally place a LSP in the network. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-mpls-rsvp-shared-labels/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-mpls-rsvp-shared-labels-00 https://datatracker.ietf.org/doc/html/draft-ietf-mpls-rsvp-shared-labels-00 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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