Performance Evaluation and Fault Repair Mechanism for Resilience of MPLS RSVP-TE Network with different application Traffic load balancing across Label Switched Path

Multi Protocol Label Switching is prominent technology in the service provider’s network as it provides efficient, reliable and fast transmission of packets across a network domain. This technology is generally used for implementing real-time applications such as voice and video applications because it provides efficient forwarding mechanism, lower network delay, scalability and anticipated results. So service providers implement this pioneering technology in their network domain so that network resources are utilized and managed in an effective way. This is due to its Traffic Engineering (TE) feature, which is used to manage the computer network effectively for efficient utilization of network resources such as bandwidth, link utilization etc. As network applications such as voice, video are increasingly being used today, so the requirements for fault tolerant networks is also increasing in order to carry sensitive voice or video traffic. The network mechanism to tolerate Faults as provided by MPLS network provides end to end “Quality of Service” .In this paper the performance of the MPLS RSVP TE network has been analyzed and how this network recover quickly from a failure situation inside an internet . The failure inside a network can be a failure of the network resource that leads to traffic drops in worst case scenario and hence results in initiating the new calculation of shortest path first around a failed resource. This paper will analyze Internet Protocol network capabilities to handle such failure situation as per the MPLS network architecture. In MPLS network, an incoming packet is classified only once as it enters into the MPLS domain and gets assigned label information and then all decisions over the path specified are based upon the attached label and not upon destination IP addresses. OPNET modeler 14.5 is used to simulate MPLS network scenario and the comparison before network failure, after network failure and after recovery is made based on some performance metrics such as voice jitter, voice packet end-to-end delay, voice delay variation, video packet delay variation and video packet end to end delay. The simulation results are analyzed and it shows that MPLS resource reservation protocol with the introduction of traffic engineering feature solution provides better performance during the network resource failure.