NDLI: On shaping TCP traffic at edge gateways

Content Provider	IEEE Xplore Digital Library
Author	Huan-Yun Wei Shih-Chiang Tsao Ying-Dar Lin
Copyright Year	2004
Description	Author affiliation: Dept. of Comput. & Inf. Sci., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan (Huan-Yun Wei; Shih-Chiang Tsao; Ying-Dar Lin)
Abstract	Many security and QoS functions have been deployed at edge gateways to provide policy-based network management. For QoS functions, the bandwidth management system can manage the narrow WAN access links. When managing the TCP traffic, pass-through TCP flows can introduce large buffer requirement, latency, buffer overflows, and unfairness among flows competing for the same queue. This study evaluates possible TCP-aware approaches through self-developed implementations in Linux, testbed emulation, and live WAN measurement. The widely deployed TCP rate control (TCR) approach is found to be more vulnerable to WAN packet losses and less compatible to several TCP sending operating systems. The proposed PostACK approach can preserve TCR's advantages while avoiding TCR's drawbacks. PostACK emulates per-flow queuing but relocates the queuing of data to the queuing of ACKs in the reverse direction, hence minimizes buffer requirement up to 96%. PostACK also has 10% goodput improvement against TCR under lossy WAN. Experimental results can be reproduced through our open sources: (1) tcp-masq: a modified Linux kernel; (2) wan-emu: a testbed for conducting switched LAN-to-WAN or WAN-to-LAN experiments with RTT/loss/jitter emulations.
Starting Page	833
Ending Page	839
File Size	776234
Page Count	7
File Format	PDF
ISBN	0780387945
DOI	10.1109/GLOCOM.2004.1378077
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wide area networks Traffic control Linux Emulation Telecommunication traffic Bandwidth Communication system traffic control Delay Buffer overflow Automatic testing
Content Type	Text
Resource Type	Article

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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
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