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Lastbalanseringstekniker över trådade samt trådlösa länkar
University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
2014 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Load-balancing techniques over wired and wirelesslinks (English)
Abstract [sv]

Dagens datornätverk är konstruerade för att leverera ett högt trafikflöde samt en säker leverans av data paket. För ett högt trafikflöde inom datanätverk används lastbalansering. Detta arbete jämför två stycken olika lastbalanseringsmetoder, Per-paket och Per-destination och jämför hur lastbalanceringsmetoderna agerar över trådade samt trådlösa länkar med fokus på Transmission Control Protocol (TCP) och File Transfer Protocol (FTP) throughput. Arbetet analyserar också paketförluster över trådlösa länkar med de olika lastbalanseringsmetoderna. Båda lastbalanseringsteknikerna, Per-paket och Per-destination testades i två olika scenarion. I det första scenariot kopplades två nätverk ihop med två trådade länkar. I det andra scenariot kopplades samma nätverk ihop med två trådlöst bryggade länkar. I det trådlösa scenariot mättes även oönskade paket så som återsändningar och dublett Acknowledgement (ACK) paket. I genomsnitt gav Per-paket lastbalansering en högre genomströmning av trafik i scenario ett. I scenario två gav per-destination högre paket genomströmning än per-paket. Per-paket gav också en större del oönskad trafik

Abstract [en]

Today’s computer networks are designed to deliver high throughput and reliable delivery, a big part of designing high-performing networks is to load-balance in order to achieve high data-rates. This work compares the two different load-balancing methods Per-packet and Per-destination load-balancing and their behaviours in a wired and in a wireless environ-ment. This paper focuses on the throughput of Transmission Control Protocol (TCP) and File Transfer Protocol (FTP) in such scenarios and also measures unwanted traffic such as retransmissions and duplicate ACKs to analyse TCP’s behaviour in a wireless load-balanced environment.

Per-packet and Per-destination load-balancing was tested in two scenarios, in scenario one both load-balancing methods was used to load-balance between two networks connected with dual wired links. In scenario two the same test was repeated between two networks connected together with dual wireless bridged links. Additionally retransmissions, duplicate Acknowledgement (ACK) packets and amount of packets out of order was also measured during scenario two. In average Per-packet load-balancing achieved higher data-rates in a wired environment while per-destination achieved higher data-rates in a wireless environment. The amount of unwanted traffic was increased while using per-packet load-balancing over wireless links

Place, publisher, year, edition, pages
2014. , p. 14
Keywords [en]
load balancing, 802.11a, 802.3, cef, wireshark, iperf, ftp, per, packet, destination
Keywords [sv]
lastbalansering, 802.11a, 802.3, cef, wireshark, iperf, ftp, per, paket, destination
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:hv:diva-6372Local ID: EDT501OAI: oai:DiVA.org:hv-6372DiVA, id: diva2:730833
Subject / course
Computer enigeering
Educational program
Nätverksteknik
Supervisors
Examiners
Available from: 2014-06-30 Created: 2014-06-30 Last updated: 2018-01-11Bibliographically approved

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