【作者】 罗峰；

【导师】 董黎刚；

【作者基本信息】 浙江工商大学 ， 通信与信息系统， 2011， 硕士

【摘要】 随着互联网流量和规模的不断增大,对路由器的性能要求越来越高。基于ForCES (Forwarding and Control Elements Separation,转发件与控制件分离)架构的路由器的集中式控制平面的存储和计算能力等受到一定限制,难以满足未来网络需求。所以,研究分布式路由协议的实现,提高控制平面的性能以更好地满足未来网络的需求,具有实际应用意义。本文主要研究面向ForCES架构的分布式OSPF协议实现的若干关键技术,主要包括：(1)面向ForCES架构的分布式OSPF协议的实现模型；(2)面向ForCES架构的分布式OSPF协议实现模型的分析与研究；(3)面向ForCES架构的分布式OSPF路由表管理与路由同步机制的研究。在以上关键技术研究的基础上,本文主要做了以下几方面的工作。(1)根据对Zebra OSPF路由协议模块的耦合性的研究,对面向ForCES架构的分布式OSPF路由协议模块进行分解。(2)从理论上分析与比较两种面向ForCES架构的分布式OSPF实现模型,通过分析与比较OSPF协议中Hello包处理、泛洪信息处理以及OSPF的收敛性,选择了一种较好的模型进行详细设计与实现。(3)对面向ForCES架构的分布式OSPF同步机制进行研究,提出了面向ForCES架构的分布式OSPF路由表管理以及路由表和转发表同步的实现方案。(4)对面向ForCES架构的分布式OSPF的相关模块进行设计与实现,主要包括分布式OSPF控制模块和转发模块的设计与实现。(5)最后,对本文所实现的面向ForCES架构的分布式OSPF协议进行功能测试和性能分析。测试结果验证了分布式OSPF实现模型的可行性与正确性,同时,通过性能分析得出本文所设计的分布式OSPF路由器在Hello包的处理以及所产生的Flooding信息流量方面优于集中式OSPF路由器。更多还原

【Abstract】 As the Internet flow and scale continuous increase, the performance requirements of routers is getting higher and higher. Centralized control plane in is ForCES-based router suffer certain limits, such as storage and computing power. Therefore, it is difficult to meet future network demand. So, it is significant to study distributed routing protocols to improve control plane of the performance for satisfying the needs of future network.This thesis mainly studies some key techniques of distributed OSPF in ForCES-based routers, including:(1) decomposition scheme of distributed OSPF implementation; (2) analysis of distributed OSPF implementation; (3) routing table management and routing synchronization mechanism.Depending on the study of the above key technologies, this thesis mainly completes the following tasks.(1) The module of Zebra OSPF routing protocols are allocated to CE and FE, based on the coupling between modules.(2) Two kinds of distributed OSPF implementations are theoretically compared and analyzed in terms of hello packet processing, flooding processing, and protocol convergence.(3) Synchronization mechanism in distributed OSPF is studied. The scheme of the routing table management and routing synchronization for ForCES architecture is designed.(4) The scheme of distributed OSPF for the ForCES architecture has been implemented. (5) Finally, we carried out experiments to test and analyze distributed OSPF for ForCES architecture. The test results show the scheme of distributed OSPF is feasible and correct. Furthermore, through the performance analysis, we found that this design of distributed OSPF router is superior to the centralized OSPF routers in hello packet processing and flooding information flows.更多还原