Byte and Packet Congestion Notification (RFC7141)
Original Publication Date: 2014-Feb-01
Included in the Prior Art Database: 2014-Feb-27
Internet Society Requests For Comment (RFCs)
B. Briscoe: AUTHOR [+2]
This document provides recommendations of best current practice for how we should correctly scale congestion control functions with respect to packet size for the long term. It also recognises that expediency may be necessary to deal with existing widely deployed protocols that don't live up to the long-term goal.
Internet Engineering Task Force (IETF) B. Briscoe Request for Comments: 7141 BT BCP: 41 J. Manner Updates: 2309, 2914 Aalto University Category: Best Current Practice February 2014 ISSN: 2070-1721
Byte and Packet Congestion Notification
This document provides recommendations of best current practice for dropping or marking packets using any active queue management (AQM) algorithm, including Random Early Detection (RED), BLUE, Pre- Congestion Notification (PCN), and newer schemes such as CoDel (Controlled Delay) and PIE (Proportional Integral controller Enhanced). We give three strong recommendations: (1) packet size should be taken into account when transports detect and respond to congestion indications, (2) packet size should not be taken into account when network equipment creates congestion signals (marking, dropping), and therefore (3) in the specific case of RED, the byte- mode packet drop variant that drops fewer small packets should not be used. This memo updates RFC 2309 to deprecate deliberate preferential treatment of small packets in AQM algorithms.
Status of This Memo
This memo documents an Internet Best Current Practice.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on BCPs is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7141.
Briscoe & Manner Best Current Practice [Page 1]
RFC 7141 Byte and Packet Congestion Notification February 2014
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