Document Type Replaced Internet-Draft (individual)
Authors Toke Høiland-Jørgensen  , Paul McKenney  , Dave Taht  , Jim Gettys  , Eric Dumazet 
Last updated 2015-05-14 (latest revision 2014-11-10)
Replaced by RFC 8290, RFC 8290
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Expired & archived
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IESG IESG state Replaced by draft-ietf-aqm-fq-codel, draft-ietf-aqm-fq-codel
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo presents the FQ-CoDel hybrid packet scheduler/AQM algorithm, a critical tool for fighting bufferbloat and reducing latency across the Internet. FQ-CoDel mixes packets from multiple flows and reduces the impact of head of line blocking from bursty traffic. It provides isolation for low-rate traffic such as DNS, web, and videoconferencing traffic. It improves utilisation across the networking fabric, especially for bidirectional traffic, by keeping queue lengths short; and it can be implemented in a memory- and CPU-efficient fashion across a wide range of hardware.


Toke Høiland-Jørgensen (toke.hoiland-jorgensen@kau.se)
Paul McKenney (paulmck@linux.vnet.ibm.com)
Dave Taht (d+ietf@teklibre.com)
Jim Gettys (jg@freedesktop.org)
Eric Dumazet (edumazet@gmail.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)