'''Blue''' is an [[active queue management]] algorithm for a [[Routernetwork (computing)|routerscheduler]] or other [[computer network]] device. Like [[random early detection]] (RED), it operates by randomly dropping or marking packet with [[explicit congestion notification]] packets in a router's queue before it overflows. Unlike RED, however, it requires little or no tuning on the part of the network administrator.<ref name="mich">{{Cite journal |title=BLUE: A New Class of Active Queue Management Algorithms |author1=Wu-chang Feng |author2=Dilip D. Kandlur |author3=Debanjan Saha |author4=Kang G. Shin |year=1999 |month=April |url=http://www.eecs.umich.edu/techreports/cse/99/CSE-TR-387-99.pdf |publisher= University of Michigan |work= Computer Science Technical Report |issue=CSE–TR–387–99 |accessdate= June 8, 2013 }}</ref>
