problem of the Internet dumb network dumb as in mute -- as in it can't talk to us about its internal state can't tell us how much bandwidth it has can't tell us why it changed its route can't change a route because we want it to can't tell us if it's being attacked for something built for communication, it's pretty disappointingly uncommunicative makes it hard to manage and provision/engineer its growth no wonder we engineer blind so much of the time ok but there's dumb and there's idiotic a routing architecture that requires humans in various NOCs to tweak link weights for good performance? that can't have been "plan A". need for greater Internet transparency grenville's nice talk on the topic http://caia.swin.edu.au/talks/031002A/031002A.pdf largely goes back to measurement. the energy we've invested in measurement of this infrastructure is far less than has been invested in any other aspect of this infrastructure, and now we're wondering why we're having a hard time getting a handle on it. [kc: not that i'm bitter :) ]