高速网络PPP协议的实现及其安全机制的研究

Implementation of PPP in High-speed Network and Research of Its Security Mechanism

研究了ＰＰＰ协议在高速ＳＤＨ／ＳＯＮＥＴ光纤网络上的实现技术，并将其应用到高速路由器的工程实践中．实现的ＰＰＰ协议软件向下和底层硬件驱动程序接口处理收到的ＰＰＰ报文；向上和网络层协议ＩＰ，ＩＰＸ接口将ＩＰ／ＩＰＸ报文送交ＩＰ／ＩＰＸ协议处理，形成发送网络层报文的控制机制。还研究了ＰＰＰ协议的安全问题，包括协议的加密和认证机制，确保报文转发过程中的高速和安全性。

The article presents the implementation technology of PPP protocol over high-speed SDH/SONET fiber networks, and applies it to the building of high-speed router.In the implementation architecture, PPP software has a lowed-level interface with hardware drivers,which processes received PPP packets. The higher-level interfaces include those with network layer protocols suck as IP and IPX which send IP/IPX packets to network layer for further processing,and provide the complete control mechanisms for sending network layer packets. Additionally, we discuss the security problem of PPP protocol, including encryption and authentication techniques, which ensures the safety of packets in transit.