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Multiprotocol Label Switching (MPLS) is a standards-approved technology for speeding up network traffic flow and making it easier to manage. MPLS involves setting up a specific path for a given sequence of packets, identified by a label put in each packet, thus saving the time needed for a router to look up the address to the next node to forward the packet to. In this paper OPNET simulator is used to analyze MPLS network .
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Efficient Data Forwarding Mechanism in Backbone Networks by Employing MPLS Technology
Multiprotocol Label Switching (MPLS) is a relatively new WAN technology that is attracting the networking professionals around the globe. Many ISPs have already deployed it in their network. Yet, some other ISPs are in the pipeline to deploy it. Nevertheless, it has caught the attention of professionals soon after it was developed. Instead of the IP address or MAC address, MPLS works on small labels. These labels are inserted between Data Link layer and Network layer of the OSI model. Forwarding decisions are based on these labels; instead of looking at complex routing tables. The MPLS network is configured, and tested under different conditions. A comparison is drawn between the IP and MPLS network. The obtained results show that MPLS has a lower end to end delay and less CPU utilization. Furthermore, MPLS has lesser processing delay as compared to the IP network. The performance difference is basically due to the intelligent forwarding mechanism of MPLS technology. It is also important to further investigate this topic in terms of security considerations. The labels values are not encrypted during transmission, and there is no authorization mechanism defined. It will be highly beneficial to have more sophisticated suite of security tools to encounter threats and vulnerabilities.
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Improvement in Traffic Engineering using MPLS-TE
In traditional IGP, all traffic follows the shortest path computed by shortest path algorithm which soon gets congested. In this some paths are unutilized and some paths are over utilized. The over utilization of path results in congestion which causes packet drops and degrades quality of service (QoS). Congestion in the traffic can be minimized by allocating fixed path for the incoming traffic, which is possible through the MPLS network through explicit path setup. Traffic Engineering is the process of controlling the traffic flows in a network, so as to optimize resource utilization and network performance. MPLS Traffic Engineering attempts to correct the inefficiencies of typical datagram routing protocols by more evenly spreading the flow of traffic across all available resource. Our aim is to do the analysis of MPLS and non-MPLS network. Also we are going to implement the optimized path computation algorithm which will find out the most optimized path as an explicit path for all traffic in MPLS network. The algorithm guarantees conflict free network due to most optimized explicit path. Since the network will be conflict free, there will be no congestion, no packet drops which ultimately improves QoS.
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