Is this really a discussion for this list-server? I don't know about all of you, but I don't have the time to continually read a re-hash of age-old discussion. Peter Lothberg <roll@Stupi.SE> wrote:
On the radio1:: "101 north is congested, take 280 instead"
Guess what hapens 5 minutes laster; On the radio2:: "280 north is congested, take 101 instead"
goto on the radio1
Goto the theory of control systems :) This is a textbook case of a system with too strong negative feedback loop. There are two ways to deal with that -- reduce the feedback (say, make the announcement in a barely intelligible speech, so only 1/3rd of drivers will get it :), or increase inertia of the system (by posting 10MPH speed limit :), so announcements can come fast enough to compensate each other. Seriously, the load-sensitive traffic management _can_ be done, but to do it you a) need full knowledge of the load patterns, plus some historical data, and b) have a way to control system in steps less drastic than rerouting an entire flow. Can't be done with ciscos, or any existing routers... --vadim