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==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 ''p<sub>d</sub>'', and whenever the queue is empty, ''p'' is decreased by a constant ''p<sub>i</sub><p<sub>d</sub>''.
For a given mix of Internet traffic, ''p'' will slowly converge to a value that keeps the queue within its bounds.
==Stochastic Fair Blue==
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