Change prio for specified traffic, not limiting bandwidth

[janus006]

Hi,
I'm trying to find how to lower the priority of my p2p traffic. I don't want to limit the bandwidth, simply want that the p2p will slow down (upload/download) as soon as any other traffic is active. And when there is no traffic, open the full pipe.
I can only find information about some kind of HFSC, PRIQ configuring bandwidth limit.
Is it possible to lower to prio of the traffic itself ?
Or it's better to lower the prio of the dedicated IP for p2p ?

Any tutorial to recomend ?

[stephenw10]

If you can match that traffic with a firewall rule you can put it in a lower priority queue.

Or you can match other traffic and put that in a higher priority queue.

It's most effective for upload though since there you are directly queuing traffic leaving your WAN.

Steve