基于BGP/MPLS VPN技术的跨域校园网仿真分析

针对跨域校园网在管理、 维护和扩展问题, 采用BGP/MPLS（Border Gateway Protocol/Multi Protocol Label Switching）VPN(Virtual Private Network)技术对跨域校园网进行规划。以OPNET仿真软件为平台, 先构建跨域的3个校区, 并按照业务系统划分3个VPN, 对网络进行配置, 实现各校区相同VPN业务之间的通信； 然后在每个校区增加一个VPN业务, 对网络进行扩展。对比扩展前后网络性能仿真结果可看出, 业务扩展后, P(Provider)和PE(Provider Edge)设备的CPU利用率比较平稳； 网络延时没有明显增加的趋势； 负载虽有增加, 但变化仍然比较平稳。在跨域校园网中应用BGP/MPLS VPN技术, 具有很好的扩展性。

Simulation Analysis of Inter-Domain Campus Network Based on BGP/MPLS VPN

Aimed at the high demand for inter domain campus network in management, maintenance and scalability, the inter domain campus network has been constructed using the technique of BGP/MPLS （Border Gateway Protocol/Multi-Protocol Label Switching） VPN (Virtual Private Network). With the OPNET simulation software, the inter domain campus network which contains the three school ranges across the region, divides VPN service in accordance with business system and network configuration realizes the communication in the school range through the same VPN service. The network propertyis analyzed. The expanding inter domain campus network which adds a VPN service in each school range has been constructed. By comparing to the simulatedresult of the network property of two scenarios, we conclude: CPU utilization of the P and PE (Provider Edge) devices before and after the services expansion, is relatively stable, no greater impact; The expanded network latency and load compared to the original network did not show a monotonically increasing trend, network delay actually decrease the load increases, but the changeis relatively stable. In summary, the inter domain campus network in the BGP/MPLS VPN technology has good scalability.