Can P2P applications learn to play fair on networks?

Sun Oct 28 07:57:23 UTC 2007

On Sat, 27 Oct 2007, Sean Donelan wrote:

> Why artificially keep access link speeds low just to prevent upstream 
> network congestion?  Why can't you have big access links?

You're the one that says that statistical overbooking doesn't work, not 
anyone else.

Since I know people that offer 100/100 to residential users that upstream 
this with GE/10GE in their networks and they are happy with it, I don't 
agree with you about the problem description.

For statistical overbooking to work, a good rule of thumb is that the 
upstream can never be more than half full normally, and each customer 
cannot have more access speed than 1/10 of the speed of the upstream 
capacity.

So for example, you can have a large number of people with 100/100 
uplinked with gig as long as that gig ring doesn't carry more than approx 
500 meg peak 5 minute average and it'll work just fine.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se