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Optimized IP-based vs. explicit paths for one-to-one backup in MPLS fast reroute

  • Michal Pioro
  • A. Tomaszewski
  • C. Zukowski
  • D. Hock
  • M. Hartmann
  • M. Menth
Publiceringsår: 2010
Språk: Engelska
Dokumenttyp: Konferensbidrag


Primary and backup paths in MPLS fast reroute

(FRR) may be established as shortest paths according to the

administrative link costs of the IP control plane, or as explicitly

calculated arbitrary paths. In both cases, the path layout can

be optimized so that the maximum link utilization for a set

of considered failure scenarios is minimized. In this paper, we

propose a linear program for the optimization of the path layout

for explicitly calculated paths, which can either produce single

paths and route entire traffic along those paths, or generate

multiple paths and spread the traffic among those paths providing

load balancing. We compare the resulting lowest maximum link

utilization in both cases with the lowest maximum link utilization

that can be obtained by optimizing unique IP-based paths. Our

results quantify the gain in resource efficiency usage provided

by optimized explicit multiple paths or explicit single paths as

compared to optimized IP-based paths.


  • Electrical Engineering, Electronic Engineering, Information Engineering


14th International Telecommunications Network Strategy and Planning Symposium NETWORKS 2010
  • Networking-lup-obsolete

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