Research On Optimization Method Of MPLS VPN Network For Railway Data Network

In today’s society,the Internet technology is developing more and more rapidly,and the railway business is also increasing day by day.In order to meet the needs of railway power environment monitoring,video conferencing,pass enger tickets,GSM-R(Global System for Mobile Communications-Railway)and other services,the railway system has established its own virtual private network,using the cross-domain MPLS VPN(Multiple Protocol of Label Swap Virtual Private Network)architecture data network to carry railway critical network traffic.With the continuous development of high-speed railways,the substantial increase in business traffic will lead to a significant increase in the CPU occupancy rate of routers in the railway data communication network,and a downward trend in the data transmission rate.This paper aims to optimize the railway data network network,reduce the burden on the routers in the network,improve the data transmission rate,and better adapt to the current network environment with increasing traffic.Based on the research on the main principles and key technologies of the railway data network cross-domain MPLS VPN network,this paper focuses on the optimization of the traditional railway data network network architecture.Optimize the routing protocol of the live network.Firstly,aiming at the optimization of the traditional railway data network network architecture,a technical scheme of the second group network of the cross-domain MPLS VPN Option C scheme is proposed,which replaces the cross-domain MPLS VPN Option B networking method in the existing backbone network.The core of this technical solution is to use e NSP(Enterprise Network Simulation Platform)enterprise network simulation platform to simulate the backbone network to complete the optimization of the backbone network network architecture.By testing the CPU usage of ASBR(Autonomous System Border Router)routers before and after optimization,it is concluded that the second group network of the cross-domain MPLS VPN Option C solution is more suitable for the railway large-traffic network environment.By using the technical solution,the network performance of the railway data network is effectively improved.Secondly,for the optimization of routing protocols in harbin sites,an optimization technical scheme from OSPF(Open Shortest Path First)to ISIS(Int ermediate System to Intermediate System)in IGP(Interior Gateway Protocol)is proposed.The core of this technical solution is to use the i Master NCE Huawei network management system to optimize the IGP protocol of the existing network of the harbin site.By testing the two parameters of the ASBR router CPU usage and the IP receiving packet rate before and after optimization,it is concluded that the ISIS protocol in the IGP protocol is better than OSPF.The conclusion is that the protocol is more suitable for the railway large-traffic network environment.After using this technical solution,the CPU usage rate of the router is no longer greatly improved when the network is expanded,and the impact of the expansion on the router is significantly reduced.At the same time,the IP receiving packet rate has also been improved and is more stable than the rate before optimization,reducing traffic fluctuations.