Obtaining Reliable Bit Rate Measurements in SNMP-Managed Networks

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Patrik Carlsson, Markus Fiedler, Kurt Tutschku, Stefan Chevul, Arne A. Nilsson
Title: Obtaining Reliable Bit Rate Measurements in SNMP-Managed Networks
Translated title: Insamlande av bit hastigheter i nätverk som stöder SNMP
Conference name: ITC Specialist Seminar
Year: 2002
Pagination: 114-123
City: Würzburg
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: Patrik.Carlsson@bth.se, Markus.Fiedler@bth.se, tutschku@informatik.uni-wuerzburg.de, Stefan.Chevul@bth.se, Arne.Nilsson@bth.se
Language: English
Abstract: The Simple Network Management Protocol, SNMP, is the most widespread standard for Internet management. As SNMP stacks are available on most equipment, this protocol has to be considered when it comes to performance management, traffic engineering and network control. However, especially when using the predominant version 1, SNMPv1, special care has to be taken to avoid erroneous results when calculating bit rates. In this work, we evalute six off-the-shelf network components. We demonstrate that bit rate measurements can be completely misleading if the sample intervals that are used are either too large or too small. We present solutions and work-arounds for these problems. The devices are evaluated with regards to their updating and response behavior.
Summary in Swedish: Vi undersöker vilka problem som kan finnas när man använder SNMP för att mäta prestanda i ett nätverk.
Subject: Telecommunications\General
Keywords: SNMP, bit rate measurement, MIB, polling, sampling, SNMP agents, response times