> Approaches like > http://www.wired.com/science/discoveries/news/2006/04/70619 > obviously don't scale to small time operators. But if you can vaccuum up close > to the core at full wire speed (and there is no reason to think you can't, > since > there are switches which deal with that) you don't have to deal with > periphery that much.
Remember, there is no core. I say that half-jokingly. Sniffing at the core will only net you a small set of potentially asymmetrical traffic flow.
