Research And Complement Of Multiprotocol Label Swtiching Recovery Mechanism

The multiprotocol label switching (MPLS) technology become the current standard most unity, the most promising label switching technology, which in the resolution of network scalability, the implementation of traffic engineering, at the same time supports a wide range of specific QoS requirements of IP protection and many other aspects of business has a unique technological advantages. It is increasingly applied to large-scale carrier-class network. There are very high requirements for security and stability of a large-scale core network. It requires that rapid detection, and using effective self-healing strategies to improve the viability of the core network, which exist not only in network congestion, routing failure, etc. but under normal network events to maintain stability, and the need for natural disasters, social crisis such as immediate response to emergencies. Therefore, to strengthen the MPLS network monitoring, management and maintenance of the significant particularly necessary on the basis of MPLS OAM emerged.Based on the conclusion of the existing specification of MPLS OAM and fault detection mechanism, this paper focus on the MPLS fault recovery and conduct an in-depth analysis study. First of all, this paper has taken an in-depth study in the MPLS core layer based on the process and framework, and has designed the methods to realize MPLS forward mapping in the IP layer, as well as MPLS tag library to handle packet forwarding mode. Then we developed the fault recovery methods in the IP network layer, and the method which is directly in the MPLS layer fault recovery bypassing the IP layer. At last this paper on how to integrate fault recovery in the core has an in-depth analysis and comparison.This paper realized MPLS Forwarding control on the core layer through the user console. On the one hand, this paper achieved a rapid fault recovery, on the other hand, it also in line with the specification of MPLS OAM. The advantage of this design guarantee the network providing continuous service capacity, and reduce the network delay caused by network fault, and improve the viability of the core network.In large-scale core network, fault recovery as a function of the kernel, usually integrated in the system kernel implementations. Because of the hardware environment in our laboratory, as well as for MPLS OAM, fault detection process with the realization of the Recovery program, this paper select the LINUX platform, user client to realize the protection switching strategy. This paper give a key technology to achieve protection switching analysis, and then sets out in detail the overall summary of the achievement of the protection switch design, detailed design, and finally realize the procedure of experimental verification.