NDLI: The power of explicit congestion notification

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Metarouting

One more bit is enough

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HLP: a next generation inter-domain routing protocol

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BLINC: multilevel traffic classification in the dark

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The power of explicit congestion notification

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Dynamic pipelining: making IP-lookup truly scalable

A DoS-limiting network architecture

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Towards an evolvable internet architecture

The power of explicit congestion notification

Content Provider	ACM Digital Library
Author	Kuzmanovic, Aleksandar
Abstract	Despite the fact that Explicit Congestion Notification (ECN) demonstrated a clear potential to substantially improve network performance, recent network measurements reveal an extremely poor usage of this option in today's Internet. In this paper, we analyze the roots of this phenomenon and develop a set of novel incentives to encourage network providers, end-hosts, and web servers to apply ECN.Initially, we examine a fundamental drawback of the current ECN specification, and demonstrate that the absence of ECN indications in TCP control packets can dramatically hinder system performance. While security reasons primarily prevent the usage of ECN bits in TCP SYN packets, we show that applying ECN to TCP SYN ACK packets can significantly improve system performance without introducing any novel security or stability side-effects. Our network experiments on a cluster of web servers show a dramatic performance improvement over the existing ECN specification: throughput increases by more than 40%, while the average web response-time simultaneously decreases by nearly an order of magnitude.In light of the above finding, using large-scale simulations, modeling, and network experiments, we re-investigate the relevance of ECN, and provide a set of practical recommendations and insights: (i) ECN systematically improves the performance of all investigated AQM schemes; contrary to common belief, this particularly holds for RED. (ii) The impact of ECN is highest for web-only traffic mixes such that even a generic AQM algorithm with ECN support outperforms all non-ECN-enabled AQM schemes that we investigated. (iii) Primarily due to moderate queuing levels, the superiority of ECN over other AQM mechanisms largely holds for high-speed backbone routers, even in more general traffic scenarios. (iv) End-hosts that apply ECN can exercise the above performance benefits instantly, without waiting for the entire Internet community to support the option.
Starting Page	61
Ending Page	72
Page Count	12
File Format	PDF
ISBN	1595930094
DOI	10.1145/1080091.1080100
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2005-08-22
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Congestion control Explicit congestion notification Active queue management
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

The power of explicit congestion notification

An Experimental Study of the Efficiency of Explicit Congestion Notification

The effects of active queue management and explicit congestion notification on web performance.

Implementing explicit congestion notification in ns-3

Design and Implementation of the Traffic Control Module in ns-3

NEWQUE with Per-flow Scheduling: Performance improvement of Active Queue Management algorithm

A new approach to Active Queue Management for TCP with ECN

The effects of Active Queue Management and Explicit Congestion Notification on DNS traffic

Techniques for eliminating packet loss in congested tcp/ip networks (1997).

The power of explicit congestion notification

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The power of explicit congestion notification

An Experimental Study of the Efficiency of Explicit Congestion Notification

The effects of active queue management and explicit congestion notification on web performance.

Implementing explicit congestion notification in ns-3

Design and Implementation of the Traffic Control Module in ns-3

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