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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Optical Crossconnects and IP
In article <[email protected]>, Fletcher E Kittredge <[email protected]> wrote: > http://smg.ulb.ac.be/Preprints/Fortz99_29.html > > mentions it was in Infocon 2000... > > And oh, yes, most definitely worth the read. A very interesting paper, but it does have a key assumption that may limit its applicability: "The above definition of the general routing problem is equivalent to the one used e.g. in Awduche et al. Its most controversial feature is the assumption that we have an estimate of a demand matrix." The approach laid out by Fortz and Thorup is very pleasant in its ability to show that a simple weight-based model can come close to optimal traffic engineering. But without any way to quantify how accurate our estimate of the demand matrix is, we cannot know whether the projected weights are actually even close to optimal. And considering the elasticity of demand, I would argue that an accurate demand matrix cannot be constructed for most Internet backbones given currently available tools and understanding. I would be happy to be wrong about this. -- Shields.
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