Analysis of RED

• Goal: impact of RED on loss and delay of bursty (TCP) and less bursty or smooth (UDP) traffic

• RED eliminates loss bias against bursty traffic by increasing loss of less bursty traffic

• RED results in higher number of consecutive packet drops, which may lead to global TCP synchronization

• RED reduces average delay, but increases delay jitter of less bursty flows

• Thus, applications such as audio may suffer more with RED than Tail Drop

• Also, loss rate seen by a flow proportional to flow intensity is only true for Poisson arrivals

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