Inline bandwidth measurements: Implementation difficulties and their solutions

Tomoaki Tsugawa, Cao Le Thanh Man, Go Hasegawa, Masayuki Murata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We have proposed the concept of inline network measurement, which involves the concept of "plugging" an active bandwidth measurement into an active TCP connection. Mechanisms using this method have the advantage of requiring no extra traffic for measuring available bandwidth, whereas other active measurement tools cannot fundamentally avoid adding probing traffic onto the network. However, when the inline network measurement algorithms are implemented in general-purpose computers, some problems arise, such as the clock resolution of the kernel system, Interrupt Coalescence (IC) deployed in network interface cards, and the behavior of TCP receiver. In the present paper, we explain these difficulties and describe our current solutions. Furthermore, we implement the measurement algorithms and the solutions against those problems in a FreeBSD 4.10 kernel system, and present some results on experimental networks. The experimentally obtained results are used to verify the solutions and to confirm the effectiveness of our concept, inline network measurement, on actual networks. We also compare the performance of the packet interval-based approaches and packet-burst interval-based approaches, and demonstrate that using packet-burst for the measurement in high-speed networks is quite effective.

Original languageEnglish
Title of host publicationFifth IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Services, E2EMON'07
DOIs
Publication statusPublished - 2007 Oct 1
Externally publishedYes
Event5th IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Services, E2EMON'07 - Munich, Germany
Duration: 2007 May 212007 May 21

Publication series

NameFifth IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Services, E2EMON'07

Conference

Conference5th IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Services, E2EMON'07
CountryGermany
CityMunich
Period07/5/2107/5/21

Keywords

  • Available bandwidth
  • Clock resolution
  • Implementation
  • Inline network measurement
  • Interrupt Coalescence (IC)
  • Transmission control protocol (TCP)

ASJC Scopus subject areas

  • Computer Science Applications
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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