Label Switched Path (LSP) Preemption Policies for MPLS Traffic Engineering

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Publisher: IETF
Doc Type: Informational
Pages: 19
Abstract: When the establishment of a higher priority (Traffic Engineering Label Switched Path) TE LSP requires the preemption of a set of lower priority TE LSPs, a node has to make a local decision to select which TE LSPs will be preempted. The preempted LSPs are then rerouted by their respective \%Head-end Label Switch Router (LSR). This document presents a flexible policy that can be used to achieve different objectives: preempt the lowest priority LSPs; preempt the minimum number of LSPs; preempt the set of TE LSPs that provide the closest amount of bandwidth to the required bandwidth for the preempting TE LSPs (to minimize bandwidth wastage); preempt the LSPs that will have the maximum chance to get rerouted. Simulation results are given and a comparison among several different policies, with respect to preemption cascading, number of preempted LSPs, priority, wasted bandwidth and blocking probability is also included. This memo provides information for the Internet community.
Publication Date: 2007-04-01
Status Note: Informational
DOI: 10.17487/RFC4829
Link: https://doi.org/10.17487/RFC4829
Author(s): Jaudelice Oliveira
JP Vasseur
Leonardo Chen
Caterina Scoglio
Keyword(s): TE LSP, Multiprotocol Label Switching Protocol

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▶ IETF RFC 4829 (2007-04-01)

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Bibliographic Reference(s)

Peyravian, M. and Kshemkalyani, A. D. , "Decentralized Network Connection Preemption Algorithms", Computer Networks and ISDN Systems, vol. 30 (11), pp. 1029-1043, June 1998. EXTERNAL
Poretsky, S. and Gannon, T., "An Algorithm for Connection Precedence and Preemption in Asynchronous Transfer Mode (ATM) Networks", Proceedings of IEEE ICC 1998. EXTERNAL
de Oliveira, J. C. et al., "A New Preemption Policy for DiffServ-Aware Traffic Engineering to Minimize Rerouting", Proceedings of IEEE INFOCOM 2002. EXTERNAL
IETF RFC 2702 [Active*]
IETF RFC 3209 [Active*]
IETF RFC 3272 [Superseded*]
IETF RFC 3564 [Active*]
IETF RFC 4124 [Active*]
IETF RFC 4126 [Active*]
IETF RFC 4127 [Active*]
IETF RFC 4128 [Active*]

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<span class="citation"><cite>IETF RFC 4829</cite>, Label Switched Path (LSP) Preemption Policies for MPLS Traffic Engineering. Available at <a href="https://doi.org/10.17487/RFC4829" target="_blank" rel="noopener">https://doi.org/10.17487/RFC4829</a></span>

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IETF RFC 4829, Label Switched Path (LSP) Preemption Policies for MPLS Traffic Engineering
doi: 10.17487/RFC4829
url: https://doi.org/10.17487/RFC4829

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<li>
<cite id="bib-rfc4829">IETF RFC 4829</cite>, Label Switched Path (LSP) Preemption Policies for MPLS Traffic Engineering
<span class="doi">10.17487/RFC4829</span>
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Referenced By

IETF RFC 5712 [Active*]