drop frames to prevent congestion, after the average load of a given queue is
extrapolated.
Maximum Drop probability fields specify the maximum drop probability of a given
traffic on the queue to be dropped. Thus, if the average filling level of a given queue
gets closer to 100%, the drop probability will get closer to the drop probability
specified. The selections of the DP levels are made at the port classification, where
each port has a specific DPL (drop precedence level) which can be used. DPL equal 0
means that no packet should be used at the election, and 1, 2 or 3 will select which
queue will be used by the port with thresholds configured at the maximum DP levels.
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