Utjecaj preusmjeravanja tokova na protokol TCP CUBIC u softverski upravljanim mrežama

undergraduate thesis

• Title (english): Effects of rerouting flows on TCP CUBIC protocol in software defined networks
• Author: Domagoj Ursa
• Mentor: Željko Ilić (mentor)
• Committee member: Željko Ilić (predsjednik povjerenstva)
• Committee member: Matija Džanko (član povjerenstva)
• Committee member: Matija Šulc (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Softversko upravljanje mrežama koncept je mrežne arhitekture koji je trenutno u nastanku i nameće se kao rješenje problema koji se pojavljuju u tradicionalnim arhitekturama. Glavna ideja koju predstavlja SDN u odnosu na tradicionalnu arhitekturu mreža je odvajanje kontrolne cjeline od podatkovne. Tim odvajanjem postiže se velika apstrakcija mreže, pa se aplikacijama i mrežnim uslugama cijela mreža prikazuje kao jedan logički komutator. Odvajanje kontrolne cjeline od podatkovne postiže se tako da mrežni uređaji, kao što su usmjerivači i komutatori ostaju bez svoje odgovornostikontrole mreže, već jednostavno prihvaćaju i procesiraju naredbe koje dolaze iz centraliziranog SDN upravljača. Centralizacijom mreže u kontrolnom sloju u jednu logičku točku pojednostavljuje se oblikovanje i upravljanje cijele mreže. Dodatno, mrežniadministratori dobivaju mogućnost podešavanja, upravljanja, osiguravanja i optimizacije mrežnih resursa s dinamičkim automatiziranim SDN programima. Unutar koncepta SDN razvijen je protokol OpenFlow koji je razvijen sa svrhom razmjena poruka između centraliziranog upravljača i mrežnih uređaja. Kako je ta komunikacija od velike važnosti i mora se osigurati neometan i pouzdan promet, komunikacija se odvija sigurnim kanalom TLS (engl. Transport Layer Security) sesije. SDN omogućava mrežnim administratorima istraživanje raznih mrežnih uvjeta sa stvarnim parametrima bez narušavanja stvarnog mrežnog prometa. Moguće je istraživati, uspoređivati i analizirati razne protokole kao npr. TCP te pratiti ponašanje tih protokola u različitim mrežnim uvjetima. Jednostavnije ispitivanje protokola dovodi do lakšeg otkrivanja nedostataka i samim time do pronalaska rješenja tih nedostatka i jednostavne implementacije novijih rješenja u stvarnu mrežu.

Abstract (english)

The Software-defined networking (SDN) concept is a network architecture currently into making and is imposed as a solution to problems that arise in tradition network architectures. The main idea represented by the SDN compared to the traditional network architectures is in the SDN architecture, the control and data planes are decoupled. As a result of this separation the underlying network infrastructure is abstracted from the applications, so for applications and network services the entire network appears as a single logical switch. Separating the control plane from the data plane is achieved so that network devices such as routers and switches are losing their responsibility of network control, they only need to listen and perform actions coming from the centralized SDN controller. Sterilization of network in the control panel into one logical point simplifies the whole design and management of the entire network. In addition, network administrators gain the ability to adjust, control and optimization of network resources with dynamic automated SDN applications.The ONF is a non-profit industry consortium that is leading the advancement of SDN and standardizing critical elements of the SDN architecture such as the protocol OpenFlow, which structures communication between the control and data planes of supported network device.Because the communication between the controller and network devices is of great importance and must ensure a smooth and reliable transport, communicationchannel issecured by TLS (Transport Layer Security) sessions. The SDN enables network administrators to explore a variety of network conditions with actual parameters without disturbing the actual network traffic. It is possible to explore, compare and analyze variousprotocols such as TCP (Transmission Control Protocol) and monitor the behavior of these protocols in a variety of network conditions. Simpler protocol testing leads to easier detection of disadvantages and therefore easier to find a solution for these problems and simpler implementation of new solutions in real networks.

• Keywords: SDN; apstrakcija; OpenFlow; SDN upravljač; TCP; TCP CUBIC
• Keywords (english): SDN; abstraction; OpenFlow; SDN controller; TCP; TCP CUBIC
• Language: croatian
• URN:NBN: urn:nbn:hr:168:760593
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 14:13:35