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Analytical performance and Evaluation of the Scalability of Layer 3 Tunneling Protocols: Case of Voice Traffic Over IP.


Faycal Bensalah, Najib El Kamoun and Ayoub BAHNASSE


Vol. 17  No. 4  pp. 361-369


With the proliferation of computer attacks and the sophistication of tools threatening data availability, network infrastructure security has become one of the most critical and challenging tasks. Virtual Private Network (VPN) technology allows two or more remote sites to be securely connected across an infrastructure, which is often publicly shared, such as the Internet. VPN technology is increasingly used by most companies because of its multiple advantages, but the latter influences the quality of the traffic carried. In this paper we will (i) study and measure the impact of different network layer VPN technologies on Voice over IP performance. (Ii) Determine the scalability of each technology with the load rise of the packets. The study was carried out under GNS3, simulating the different VPN technologies: GRE, IPsec, GRE over IPsec, DMVPN, and DMVPN protected by IPsec.


VPN, IPsec, GRE, DMVPN, GNS3, Scalability, VOIP.