On Sun, Oct 21, 2007, Christopher E. Brown wrote:

Where is there a need to go beyond simple remarking and WRED? Marking P2P as scavenger class and letting the existing QoS configs in the network deal with it works well.

Because the p2p client authors (and users!) are out to maximise throughput and mess entirely with any concept of fairness. Ah, if people understood cooperativeness..

A properly configured scavenger class allows up to X to be used at any one timer where X is the capacity unused by the rest of the traffic at that time.

Adrian