Why should we set qLans bw to 80-90% from the DL cap given by the ISP?

[Walgus]

Hi, i read somewhere in this forum that the qLAN root bandwidth should be set to 80%, up to 90% of the contracted download line and i always wondered why is this so? I tried following this tip but then my p2p downloads cant go any higher than the 80% set on the qLan root, meaning that the 20% left is just sitting there unused.

[SeventhSon]

The point of QoS is NOT to have the queues build up, not use all the bandwidth, so if you keep accepting packet at the maximum rate (and thus increasing latency for incoming packets), it's already to late to do shaping, the packets already arrive with a delay.

You can't control what packets are sent to you directly.