Nowadays, enterprises rely on Internet connectivity to deliver intra-enterprise services among the enterprise network. Due to the continuous evolution of Internet services, interconnecting enterprise offices, data centers and headquarters became an important business resource. The interconnection provides enterprises capabilities of offering services in a more agile and flexible way, thus resulting in a significant competitive advantage. Wide Area Network (WAN) is the communication network providing such connectivity to enterprises. Traditional WAN implementations are based on Multiprotocol Label Switching (MPLS) connectivity, a high-performance connectivity service that exploits private circuits leasing. The limit of the MPLS is the static nature of its links and high expenses, both for customer and for the provider of the service. Overprovisioning and under utilization of the resources are the major drawback of the traditional approach. Software Defined Networking (SDN) is the networking paradigm bringing revolution to WANs. By centralizing the control logic of the network, SDN provides network agility and characteristics necessary to adapt the performance to enterprise needs. This thesis’ objective is to present an implementation of Software Defined WAN (SD-WAN) solution based on open source components. SD-WAN introduces SDN at the enterprise locations to dynamically control the access to the WAN. The proposed architecture is based on OpenDaylight controller, Open vSwitch virtual appliances and a set of services for network monitoring and policy based path selection. Our implementation provides a secured overlay WAN with high performance (in terms of delay, losses and jitter) over public WAN connectivity. Our implementation offers a low cost solution to enterprises by avoiding the use of MPLS.
Oggigiorno, le aziende sfruttano la connettività Internet al fine di erogare servizi attraverso la rete aziendale. Data la continua evoluzione dei servizi Internet, l’interconnessione aziendale tra i vari uffici remoti, le banche dati e il quartier generale risulta in un’importante risorsa economica. L’interconnessione consente alle aziende di offrire servizi in modo più agile e flessibile, costituendo così un notevole vantaggio competitivo. La Wide Area Network (WAN) è la rete di comunicazione che provvede a offrire suddette interconnessioni tra le varie filiali aziendali. Le reti WAN tradizionali si basano su connettività Multiprotocol Label Switching (MPLS), un servizio di interconnessione che offre alte performance tramite leasing di circuiti privati. Il limite dei circuiti MPLS è dovuto alla natura statica di essi ed agli alti costi, sia per il cliente che per l’erogatore del servizio. L’overprovisioning e il sottoutilizzo di risorse MPLS rappresentano lo svantaggio dell’approccio tradizionale. Software Defined Networking (SDN) è il paradigma di rete che sta rivoluzionando le reti WAN. Centralizzando la logica di controllo della rete, SDN offre l’agilità e le caratteristiche necessarie ad adattare le prestazioni alle reali necessità delle aziende. L’obiettivo di tesi è presentare un’implementazione di rete Software Defined WAN (SD-WAN) basata su software open source. SD-WAN introduce l’SDN nelle filiali aziendali per offrire un accesso dinamico alla rete WAN. Nel cuore della nostra implementazione troviamo il controllore di rete SDN OpenDaylight, gli apparati virtuali Open vSwitch e servizi per il monitoring di rete e selezione di percorsi basati su policy aziendali. La nostra implementazione fornisce un overlay di rete WAN sicuro caratterizzato da alte prestazioni (in termini di ritardo, jitter e perdite di pacchetti) su reti WAN pubbliche. Non utilizzando MPLS, il costo della nostra soluzione per un’azienda risulta molto più contenuto.
An enterprise network based on SD-WAN
MARALIT, ALVIN JAN
2017/2018
Abstract
Nowadays, enterprises rely on Internet connectivity to deliver intra-enterprise services among the enterprise network. Due to the continuous evolution of Internet services, interconnecting enterprise offices, data centers and headquarters became an important business resource. The interconnection provides enterprises capabilities of offering services in a more agile and flexible way, thus resulting in a significant competitive advantage. Wide Area Network (WAN) is the communication network providing such connectivity to enterprises. Traditional WAN implementations are based on Multiprotocol Label Switching (MPLS) connectivity, a high-performance connectivity service that exploits private circuits leasing. The limit of the MPLS is the static nature of its links and high expenses, both for customer and for the provider of the service. Overprovisioning and under utilization of the resources are the major drawback of the traditional approach. Software Defined Networking (SDN) is the networking paradigm bringing revolution to WANs. By centralizing the control logic of the network, SDN provides network agility and characteristics necessary to adapt the performance to enterprise needs. This thesis’ objective is to present an implementation of Software Defined WAN (SD-WAN) solution based on open source components. SD-WAN introduces SDN at the enterprise locations to dynamically control the access to the WAN. The proposed architecture is based on OpenDaylight controller, Open vSwitch virtual appliances and a set of services for network monitoring and policy based path selection. Our implementation provides a secured overlay WAN with high performance (in terms of delay, losses and jitter) over public WAN connectivity. Our implementation offers a low cost solution to enterprises by avoiding the use of MPLS.| File | Dimensione | Formato | |
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https://hdl.handle.net/10589/139954