[100595] in North American Network Operators' Group
Re: Can P2P applications learn to play fair on networks?
daemon@ATHENA.MIT.EDU (Mikael Abrahamsson)
Sun Oct 28 03:58:23 2007
Date: Sun, 28 Oct 2007 08:57:23 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: nanog@merit.edu
In-Reply-To: <Pine.GSO.4.64.0710271926370.2128@clifden.donelan.com>
Errors-To: owner-nanog@merit.edu
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@swm.pp.se
