The Benefits of Using Explicit Congestion Notification (ECN) (RFC8087)
Original Publication Date: 2017-Mar-01
Included in the Prior Art Database: 2017-Mar-08
Internet Society Requests For Comment (RFCs)
G. Fairhurst: AUTHOR [+2]
Internet transports (such as TCP and Stream Control Transmission Protocol (SCTP)) are implemented in endpoints (Internet hosts) and are designed to detect and react to network congestion. Congestion may be detected by loss of an IP packet or, if Explicit Congestion Notification (ECN) [RFC3168] is enabled, by the reception of a packet with a Congestion Experienced (CE) marking in the IP header. Both of these are treated by transports as indications of congestion. ECN may also be enabled by other transports: UDP applications that provide congestion control may enable ECN when they are able to correctly process the ECN signals [RFC8085] (e.g., ECN with RTP [RFC6679]).
Internet Engineering Task Force (IETF) G. Fairhurst Request for Comments: 8087 University of Aberdeen Category: Informational M. Welzl ISSN: 2070-1721 University of Oslo March 2017
The Benefits of Using Explicit Congestion Notification (ECN)
The goal of this document is to describe the potential benefits of applications using a transport that enables Explicit Congestion Notification (ECN). The document outlines the principal gains in terms of increased throughput, reduced delay, and other benefits when ECN is used over a network path that includes equipment that supports Congestion Experienced (CE) marking. It also discusses challenges for successful deployment of ECN. It does not propose new algorithms to use ECN nor does it describe the details of implementation of ECN in endpoint devices (Internet hosts), routers, or other network devices.
Status of This Memo
This document is not an Internet Standards Track specification; it is published for informational purposes.
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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 7841.
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/rfc8087.
Fairhurst & Welzl Informational [Page 1]
RFC 8087 Benefits of ECN March 2017
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