[j-nsp] Analyzing traffic content

[Cydon Satyr]

Hello experts.
This is not directly tied to Juniper, but any help is welcomed.
What I'm curios about is what kind of tools you use in your network to
gather statistics/analyze traffic patterns on your links to other upstream
provider/peering partners.

For example, how do you analyze how much of your bandwidth your customers
use for video content, p2p traffic, vpn, web-surfing, etc? How much of your
% is youtube traffic, how much is email traffic?

I hope the question makes sense.

Best regards