Fast Reroute Research And Application Based On Traffic Engineering With MPLS

Multi-protocol Label Switching (MPLS) technology appears after the 1990s, because of its fast speed with more advantages, such as multi-service support, quality of service, has obtained the considerable development, is playing more and more important role in the next generation telecommunication network. In order to ensure the reliability of MPLS network, MPLS Fast Reroute (FRR) based on traffic engineering with the ability to provide fast protection and switching LSP capacity. FRR can switch the data traffic immediately to the backup path when a node or link fails in the main LSP, owing to the backup LSP or tunnels are pre-established, thus data loss is reduced with greatest degree.This paper mainly centers on FRR technology based on MPLS network .First introduces MPLS traffic engineering and present situation of domestic and foreign FRR research, that provide the theory foundation to realize the MPLS-TE FRR. Then a new partial path model is proposed based on two kind of standard FRR analysis's foundation. The model expands RSVP Hello messages and defines a new Target Hello message. Target Hello message can quickly detect failures of MPLS tunnel between arbitrary nodes, so it helps to provides partial path protection. Compared with local protection, the new model is no longer limited to detection of a link or node that can effectively reduce the number of backup tunnels and massive bandwidth resources.Another focus of the paper is designed and implemented a distributed FRR, which improve the router performance of protection. The project uses the Facility multiple backup tunnel theoretically that a backup tunnel can protect many main tunnels and a main tunnel is protected by many backup tunnels. In the mechanism, the main processing units concentrate on RSVP messages and events to maintain the main tunnels and backup tunnels, at the same time, the line processing units distributed parallel fast detection and failover to the protective effect of milliseconds. Test results showed that deployment of such a distributed Fast Reroute that recovery time and packet loss rate decreased significantly and the network performance has the distinct enhancement.