Operation of Blue
A Blue queue maintains a drop/mark probability p, and drops/marks packets with probability p as they enter the queue. Whenever the queue overflows, p is increased by a small constant pd, and whenever the queue is empty, p is decreased by a constant pi
Assuming the mix of traffic on the interface doesn't change, p will slowly converge to a value that keeps the queue within its bounds with full link utilisation.
Read more about this topic: Blue (queue Management Algorithm)
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