January 2001
Intermediate to advanced
368 pages
11h 35m
English
Content preview from IP Quality of Service
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130 Chapter 6: Per-Hop Behavior: Congestion Avoidance and Packet Drop Policy
RED—Proactive Queue Management for Congestion
Avoidance
The behavior of TCP sources due to tail-drop underscores the need for proactive queue
management to signal congestion before the queue is full, and to control queue sizes to
minimize queuing delays. RED is a congestion avoidance mechanism proposed by Sally
Floyd and Van Jacobson
3
. It is an active queue management technique intended to provide
considerable performance advantages over a traditional tail-drop approach.
RED takes a proactive approach to congestion. Instead of waiting until the queue is
completely filled ...
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