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Re: Can P2P applications learn to play fair on networks?
- From: Sam Stickland
- Date: Tue Oct 23 11:35:48 2007
Iljitsch van Beijnum wrote:
On 23-okt-2007, at 15:43, Sam Stickland wrote:Oh, you mean to do this based on traffic volume, and not current traffic
rate? I suspose an external monitoring/billing tool would need track
this and reprogram the neccessary router/switch, but it's the sort of
infrastructure most ISPs would need to have anyway.
What I would like is a system where there are two diffserv traffic
classes: normal and scavenger-like. When a user trips some
predefined traffic limit within a certain period, all their traffic
is put in the scavenger bucket which takes a back seat to normal
traffic. P2P users can then voluntarily choose to classify their
traffic in the lower service class where it doesn't get in the way
of interactive applications (both theirs and their neighbor's).
Surely you would only want to set traffic that falls outside the
limit as scavenger, rather than all of it?
If the ISP gives you (say) 1 GB a month upload capacity and on the 3rd
you've used that up, then you'd be in the "worse effort" traffic class
for ALL your traffic the rest of the month. But if you voluntarily
give your P2P stuff the worse effort traffic class, this means you get
to upload all the time (although probably not as fast) without having
to worry about hurting your other traffic. This is both good in the
short term, because your VoIP stuff still works when an upload is
happening, and in the long term, because you get to do video
conferencing throughout the month, which didn't work before after you
went over 1 GB.
I was thinking more along the lines of: everything above 512 kbps (that
isn't already marked worse-effort) gets marked worse effort, all of the