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Scalability Evaluation of VOIP over Various MPLS Tunneling under OPNET Modeler
This paper studies and evaluate Scalability of Voice over IP (VOIP) on various MPLS Tunneling technologies. Several works have been carried out to evaluate the performances of VOIP in different IP and MPLS architectures. According to our research, no scientific work has been done analyzing scalability by increasing the load of VOIP packets in different MPLS tunneling technologies. This was a motivation for us to propose a scalability study of the VOIP technology in the various scenarios (IP, MPLS, MPLS VPN and MPLS VPN protected by IPsec). The study was conducted on 64 different scenarios by changing MPLS tunneling technology and rising the packet load to the order of 2 ^ n ranging from 64 to 475000. The obtained results showed that the IP network is affected by a high latency and a bad MOS score. While MPLS remains scalable even in high load scenario (475000 bytes). IPsec on MPLS VPN isn't a good choice to add additional security level, from results it's shown clearly that from scenario of 46875 bytes on load, VOIP become unusable. This study carried out under OPNET Modeler 14.5, the evaluation criteria are jitter, latency, loss rate and MOS score.
MPLS, MPLS VPN, Scalability VOIP, VOIP.
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