NDLI: Research on Errors of Utilized Bandwidth Measured by NetFlow

Content Provider	IEEE Xplore Digital Library
Author	Haiting Zhu Xiaoguo Zhang Wei Ding
Copyright Year	2011
Abstract	NetFlow is a popular technology in network management nowadays. It supports administrators to get various performance metrics. But metric values estimated from NetFlow records may inaccurate in some circumstance. This paper aims at studying the errors of utilized bandwidth measured by NetFlow. At first, packet streams with a specific format were collected from the backbone by passive measurement and these packet streams are called IP Traces that are used as our experimental data. Then, by using IP Traces, NetFlow records were produced according to NetFlow principles using different sampling ratios and the utilized bandwidths are calculated by NetFlow records at different time granularities. These utilized bandwidths called measured values will be compared to the true values that are directly calculated using IP Traces. At last, the relative errors of utilized bandwidth are presented based on measured values and true values. The experimental results show that bigger time granularity results in smaller error of utilized bandwidth measured by NetFlow, and smaller sampling ratio produces smaller errors. However, if the two factors are considered separately, the error is still large. Only when time granularity is big enough and the sampling ratio is small enough the error could be acceptable. If we want to acquire the satisfying precision, time granularity and sampling ratio need to be set properly. The study results of this paper can provide some guidance and reference for estimating utilized bandwidth with NetFlow.
Starting Page	45
Ending Page	49
File Size	169154
Page Count	5
File Format	PDF
ISBN	9781457704079
DOI	10.1109/ICNDC.2011.17
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Estimation error IP Trace Measurement uncertainty Utilized bandwidth Bandwidth NetFlow Time measurement IP networks Monitoring Measurement error
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

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