7 Citations (Scopus)
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Abstract

Traditional traffic measurements meter throughput on time scales in the order of 5 minutes, e.g., using the Multi Router Traffic Grapher (MRTG) tool. The time scale on which users and machines perceive Quality of Service (QoS) is, obviously, orders of magnitudes smaller. One of many possible reasons for degradation of the perceived quality, is congestion on links along the path network packets traverse. In order to prevent quality degradation due to congestion, network links have to be dimensioned in such a way that they appropriately cater for traffic bursts on time scales similarly small to the time scale that determines perceived QoS. It is well-known that variability of link load on small time scales (e.g., 10 milliseconds) is larger than on large time scales (e.g., 5 minutes). Few quantitative figures are known, however, about the magnitude of the differences between fine and coarse-grained measurements. The novel aspect of this paper is that it quantifies the differences in measured link load on small and large time scales. The paper describes two case studies. One of the surprising results is that, even for a network with 2000 users, the difference between short-term and long-term average load can be more than 100%. This leads to the conclusion that, in order to prevent congestion, it may not be sufficient to use the 5 minute MRTG maximum and add a small safety margin.
Original languageUndefined
Place of PublicationEnschede
PublisherCentre for Telematics and Information Technology (CTIT)
Number of pages18
Publication statusPublished - Aug 2003

Publication series

NameCTIT technical reports
PublisherUniversity of Twente, Centre for Telematics and Information Technology (CTIT)
No.2003-36

Keywords

  • METIS-217483
  • EWI-5815
  • IR-41386

Cite this

van de Meent, R., Pras, A., Mandjes, M. R. H., van den Berg, H. L., & Nieuwenhuis, L. J. M. (2003). Traffic Measurements for Link Dimensioning, A Case Study. (CTIT technical reports; No. 2003-36). Enschede: Centre for Telematics and Information Technology (CTIT).
van de Meent, R. ; Pras, Aiko ; Mandjes, M.R.H. ; van den Berg, Hans Leo ; Nieuwenhuis, Lambertus Johannes Maria. / Traffic Measurements for Link Dimensioning, A Case Study. Enschede : Centre for Telematics and Information Technology (CTIT), 2003. 18 p. (CTIT technical reports; 2003-36).
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abstract = "Traditional traffic measurements meter throughput on time scales in the order of 5 minutes, e.g., using the Multi Router Traffic Grapher (MRTG) tool. The time scale on which users and machines perceive Quality of Service (QoS) is, obviously, orders of magnitudes smaller. One of many possible reasons for degradation of the perceived quality, is congestion on links along the path network packets traverse. In order to prevent quality degradation due to congestion, network links have to be dimensioned in such a way that they appropriately cater for traffic bursts on time scales similarly small to the time scale that determines perceived QoS. It is well-known that variability of link load on small time scales (e.g., 10 milliseconds) is larger than on large time scales (e.g., 5 minutes). Few quantitative figures are known, however, about the magnitude of the differences between fine and coarse-grained measurements. The novel aspect of this paper is that it quantifies the differences in measured link load on small and large time scales. The paper describes two case studies. One of the surprising results is that, even for a network with 2000 users, the difference between short-term and long-term average load can be more than 100{\%}. This leads to the conclusion that, in order to prevent congestion, it may not be sufficient to use the 5 minute MRTG maximum and add a small safety margin.",
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author = "{van de Meent}, R. and Aiko Pras and M.R.H. Mandjes and {van den Berg}, {Hans Leo} and Nieuwenhuis, {Lambertus Johannes Maria}",
note = "Imported from CTIT",
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month = "8",
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series = "CTIT technical reports",
publisher = "Centre for Telematics and Information Technology (CTIT)",
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van de Meent, R, Pras, A, Mandjes, MRH, van den Berg, HL & Nieuwenhuis, LJM 2003, Traffic Measurements for Link Dimensioning, A Case Study. CTIT technical reports, no. 2003-36, Centre for Telematics and Information Technology (CTIT), Enschede.

Traffic Measurements for Link Dimensioning, A Case Study. / van de Meent, R.; Pras, Aiko; Mandjes, M.R.H.; van den Berg, Hans Leo; Nieuwenhuis, Lambertus Johannes Maria.

Enschede : Centre for Telematics and Information Technology (CTIT), 2003. 18 p. (CTIT technical reports; No. 2003-36).

Research output: Book/ReportReportProfessional

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T1 - Traffic Measurements for Link Dimensioning, A Case Study

AU - van de Meent, R.

AU - Pras, Aiko

AU - Mandjes, M.R.H.

AU - van den Berg, Hans Leo

AU - Nieuwenhuis, Lambertus Johannes Maria

N1 - Imported from CTIT

PY - 2003/8

Y1 - 2003/8

N2 - Traditional traffic measurements meter throughput on time scales in the order of 5 minutes, e.g., using the Multi Router Traffic Grapher (MRTG) tool. The time scale on which users and machines perceive Quality of Service (QoS) is, obviously, orders of magnitudes smaller. One of many possible reasons for degradation of the perceived quality, is congestion on links along the path network packets traverse. In order to prevent quality degradation due to congestion, network links have to be dimensioned in such a way that they appropriately cater for traffic bursts on time scales similarly small to the time scale that determines perceived QoS. It is well-known that variability of link load on small time scales (e.g., 10 milliseconds) is larger than on large time scales (e.g., 5 minutes). Few quantitative figures are known, however, about the magnitude of the differences between fine and coarse-grained measurements. The novel aspect of this paper is that it quantifies the differences in measured link load on small and large time scales. The paper describes two case studies. One of the surprising results is that, even for a network with 2000 users, the difference between short-term and long-term average load can be more than 100%. This leads to the conclusion that, in order to prevent congestion, it may not be sufficient to use the 5 minute MRTG maximum and add a small safety margin.

AB - Traditional traffic measurements meter throughput on time scales in the order of 5 minutes, e.g., using the Multi Router Traffic Grapher (MRTG) tool. The time scale on which users and machines perceive Quality of Service (QoS) is, obviously, orders of magnitudes smaller. One of many possible reasons for degradation of the perceived quality, is congestion on links along the path network packets traverse. In order to prevent quality degradation due to congestion, network links have to be dimensioned in such a way that they appropriately cater for traffic bursts on time scales similarly small to the time scale that determines perceived QoS. It is well-known that variability of link load on small time scales (e.g., 10 milliseconds) is larger than on large time scales (e.g., 5 minutes). Few quantitative figures are known, however, about the magnitude of the differences between fine and coarse-grained measurements. The novel aspect of this paper is that it quantifies the differences in measured link load on small and large time scales. The paper describes two case studies. One of the surprising results is that, even for a network with 2000 users, the difference between short-term and long-term average load can be more than 100%. This leads to the conclusion that, in order to prevent congestion, it may not be sufficient to use the 5 minute MRTG maximum and add a small safety margin.

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BT - Traffic Measurements for Link Dimensioning, A Case Study

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van de Meent R, Pras A, Mandjes MRH, van den Berg HL, Nieuwenhuis LJM. Traffic Measurements for Link Dimensioning, A Case Study. Enschede: Centre for Telematics and Information Technology (CTIT), 2003. 18 p. (CTIT technical reports; 2003-36).