The Design And Implementation Of LDP System In MPLS Technology

With the fast sprending of network applications, enterprises begin to use the information technology solution based on network to help them create benefit. VPN, what has high reliability and security, is an excellent carrier of intranet used by enterprises. Traditional VPN technology which based on L2TP/PPTP, has disADVantage of Weak encryption and authentication, low security. As the new generation VPN technology, MPLS VPN makes up for the disADVantage of the previous generation of VPN technology with higher security and flexibility. MPLS technology is a complete protocol architecture. The LDP is customized for MPLS as signaling protocol, it is used for MPLS Protocol label production, distribution, and recovery. In the complex network environment, routing oscillation causes low efficiency of LDP, equipment failure causes the forwarding interrupt. The LDP system discussed by this paper, develop an solution to improve these weak point.The LDP system discussed by this paper.adopted a modular and top-down design methodology. It divided the system to three independent modules, called MAIN, ADV, and NSR, which is used to create and MAINtance LDP session, process label, no stop routing.The LDP system picked C as development language, and each module has an independent thread with message queue as communication method.The LDP system in Comware V7, provides more effective solution then other LDP system with task queue, while it has completed all function defined in RFC 5036 by IETF. And it provides no stopping routing function, what makes it more reliable.