Abstract

Flexible, fast, simple and efficient reliability schemes are required in the two-layer “IP over WDM” architecture envisioned for the future optical Internet. Ideally, these schemes must provide a swift resilience scheme at the physical WDM layer (or Optical Layer) that continuously adapts itself to the traffic changes of the highly dynamic IP layer. Restoration schemes have been long used at the IP layer to cope with such traffic dynamics, and may be extended to work in IP over WDM and, more specifically, GMPLS¹ solutions. In its broadest definition, upon failure of the working path a restoration scheme searches for a restoration path to reach the destination.^2,3

© 2002 Optical Society of America