Meritve ravni storitev v poslovnih internetnih omrežjih

Špenko, Aleš (author), Kos, Andrej (mentor)

V magistrskem delu se osredotočamo na delovanje sistema za spremljanje parametrov o ravni storitve (SLA), ki so predmet dogovora med naročnikom in ponudnikom storitev. Vse več naročnikov storitev se želi prepričati, ali jim je zagotovljena takšna kvaliteta storitev, kot so jo naročili in jo tudi plačajo. Zaradi tega morajo ponudniki storitev začeti spremljati kakovost storitev, da lahko uporabniku kadarkoli pokažejo oziroma dokažejo kakšno raven storitev mu zagotavljajo. V uvodnem poglavju je opisano, kaj sploh je sporazum o ravni storitve (SLA). V njem so opisani tudi parametri SLA, ki jih spremljamo s sistemom SmartSLA. Drugo poglavje opisuje OAM in predstavlja standarde, na katerih temelji delovanje samega sistema. Opisani so standardi, ki delujejo na drugem sloju ISO OSI modela, in sicer IEEE 802.3ah, IEEE 802.1ag in Y.1731. Na koncu poglavja pa sledi še opis standarda RFC 5357 TWAMP, ki deluje na tretjem sloju ISO OSI modela. Sledi tretje poglavje, kjer najprej predstavimo zahteve po sistemu za spremljanje parametrov SLA. Nato so na kratko opisana orodja na trgu in primerjava le teh. Sledi opis postopkov, ki smo jih uporabili pri izvajanju meritev SLA parametrov. Predstavljeni so optoelektrični moduli Smart SFP. Sledi opis merilne sonde in poteka meritev s sistemom Smart SLA. V zadnjem, četrtem, poglavju je predstavljen primer zahtev, na osnovi katerih smo opravili meritve in izvedba meritev. V prvem podpoglavju je opisan potek izvajanja meritev. Nato sledi opis meritev, ki so bile opravljene na testnem poligonu. Kot zadnje podpoglavje pa predstavimo primerjavo rezultatov meritev na različnih tehnologijah. Sledi še sklep, v katerem strnemo svoja dognanja.

• Language: Slovenian
• Keywords: OAM, parametri SLA, SmartSLA
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-88459
• Publication date in RUL: 06.01.2017

Secondary language

• Language: English
• Title: Service level measurements in business internet networks

Abstract

This master’s dissertation focuses on a system for monitoring service-level agreement (SLA) parameters, which should be previously agreed upon between the client and service provider. More and more subscribers are trying to persuade, or to ensure the quality of such services as ordered and paid for. As a result, service providers must begin to monitor the quality of services to the user at any time to show or demonstrate level of service they provide. The first chapter contains an explanation of service-level agreements (SLA). There are also portrayed parameters that are being monitored through Smart SLA system. Next chapter focuses on OAM and standards the system was built on. We describe IEEE 802.3ah, IEEE 802.1ag and Y.1731 standards being used on the second layer of ISO OSI model. We finish the chapter with a description of RFC 5357 TWAMP standard, which is being used on the third level of ISO OSI model. Following is a third chapter that describes demands for measuring system SLA parameters. Afterwards we explicate and compare tools on the market. Next comes description of procedures that were used at performing measurments of SLA parameters. We represent Smart SFP optoelectronic modules. Then we describe measurement probe and procedure of measuring using Smart SLA. The last, fourth, chapter represents the practical part of this dissertation. It presents an example of demands on which measurments were based on and depicts how measurements are carried out. We start by describing the measuring process and follow with sample measurements, carried out on the testing ground. Finally, we compare results of measurements using different technologies. At the end there is a conclusion in which we sum up our discoveries.

• Keywords: OAM, SLA parameters, SmartSLA