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InterTubes: A Study of the US Long-Haul Fiber-Optic Infrastructure [pdf]
- JTon 11y agoVery interesting study. I don't see any mention of the use of optical protection switching to mitigate the risk of a single fiber cut. Recent advancements in DSP have made it possible to optically protect a link over hundreds (and sometimes thousands) of kilometers. Assuming the provider has diverse infrastructure (paths) available.
- erentz 11y agoPhysical layer protection has mostly gone out of favor due to its inefficiencies. Resiliency is handled well by higher layers (IP/MPLS). Still understanding shared risk at the physical layer is important to the configuration of protection schemes at those higher layers.