A router architecture based upon ForCES （Forwarding and Control Element Separation）, which is being standardized by IETF ForCES working group, gains its competitive advantage over traditional router architectures in...A router architecture based upon ForCES （Forwarding and Control Element Separation）, which is being standardized by IETF ForCES working group, gains its competitive advantage over traditional router architectures in flexibility, programmability, and cost-effectiveness. In this paper, design and implementation of a ForCES-based router （ForTER） is illustrated. Firstly, the implementation architecture of ForTER is discussed. Then, a layered software model, which well illustrates ForCES features, is proposed. Based on the model, design and implementation of Control Element （CE） and Forwarding Element （FE） in ForTER are introduced in detail. Moreover, security for ForTER is considered and an algorithm to prevent DoS attacks is presented. Lastly, experiments of ForTER are illustrated for routing and running routing protocols, network management, DoS attack prevention, etc. The experimental results show the feasibility of the ForTER design. Consequently, the ForTER implementation basically testifies the feasibility of ForCES architecture and some IETF ForCES specifications.展开更多
研究发现,Linux的内核模块具有良好的可控性而Linux的软中断具有极强的实时性。提出把两者有机地结合起来作为逻辑功能块(Logical Functional B lock,LFB)的实现机制,并用流标识号(PkfID)来描述LFB。实验表明采用这种方法实现的LFB能很...研究发现,Linux的内核模块具有良好的可控性而Linux的软中断具有极强的实时性。提出把两者有机地结合起来作为逻辑功能块(Logical Functional B lock,LFB)的实现机制,并用流标识号(PkfID)来描述LFB。实验表明采用这种方法实现的LFB能很好地满足ForCES需求(RFC 3654)。展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos. 60573116 and 60603072the National High Technology Development 863 Program of China under Grant No. 2007AA01Z201+1 种基金the Zhejiang Provincial NSF China under Grant Nos. Z106829, Y106747the Zhejiang Sci & Tech Project under Grant No. 2006C11215.
文摘A router architecture based upon ForCES （Forwarding and Control Element Separation）, which is being standardized by IETF ForCES working group, gains its competitive advantage over traditional router architectures in flexibility, programmability, and cost-effectiveness. In this paper, design and implementation of a ForCES-based router （ForTER） is illustrated. Firstly, the implementation architecture of ForTER is discussed. Then, a layered software model, which well illustrates ForCES features, is proposed. Based on the model, design and implementation of Control Element （CE） and Forwarding Element （FE） in ForTER are introduced in detail. Moreover, security for ForTER is considered and an algorithm to prevent DoS attacks is presented. Lastly, experiments of ForTER are illustrated for routing and running routing protocols, network management, DoS attack prevention, etc. The experimental results show the feasibility of the ForTER design. Consequently, the ForTER implementation basically testifies the feasibility of ForCES architecture and some IETF ForCES specifications.
文摘研究发现,Linux的内核模块具有良好的可控性而Linux的软中断具有极强的实时性。提出把两者有机地结合起来作为逻辑功能块(Logical Functional B lock,LFB)的实现机制,并用流标识号(PkfID)来描述LFB。实验表明采用这种方法实现的LFB能很好地满足ForCES需求(RFC 3654)。
