Editing Random early detection (section)

== Problems with classic RED ==
According to Van Jacobson, "there are not one, but two bugs in classic RED."<ref name="jgred">{{cite web
 | url=http://gettys.wordpress.com/2010/12/17/red-in-a-different-light/
 | title=RED in a Different Light
 | first = Jim | last=Gettys | date= 2010-12-17  |work=jg's Ramblings | accessdate =2010-12-27
}}</ref> Improvements to the algorithm were developed, and a draft paper<ref>{{cite journal
  | last1 = Jacobson | first1 = Van | last2 = Nichols | first2 = Kathy | last3 = Poduri | first3 = Kedar
  | title = RED in a Different Light | date = 1999-09-30
  | citeseerx = 10.1.1.22.9406 }}</ref> was prepared, but the paper was never published, and the improvements were not widely disseminated or implemented. There has been some work in trying to finish off the research and fix the bugs.<ref name="jgred" />

Pure RED does not accommodate [[quality of service]] (QoS) differentiation. [[Weighted random early detection|Weighted RED]] (WRED) and RED with In and Out (RIO)<ref>{{cite news
 | title= An Approach to Service Allocation in the Internet
 | url = http://tools.ietf.org/html/draft-clark-diff-svc-alloc-00
 | first1 = David D. | last1 = Clark | first2 = John | last2 = Wroclawski
 | newspaper = Ietf Datatracker
 |date=July 1997  | page = 12 | accessdate = 2011-05-27 | publisher = IETF
}}</ref> provide early detection with QoS considerations.