基于SDN的跨域路由集中化：一个支持BGP演化的模型和仿真框架
Routing Centralization Across Domains via SDN: A Model and Emulation Framework for BGP Evolution
摘要：
在这项工作中，我们提出了一个激进的，渐进式部署的互联网路由模式，其中多个网络的控制平面是集中的。这遵循软件定义网络（SDN）范例，尽管是在涉及多个自治系统（AS）的域间级别。多域SDN集中化可以通过将路由功能外包给外部承包商来实现，外部承包商通过多AS网络控制器提供域间路由服务。拟议的模型有望成为不断发展的BGP的工具，并使用多个网络的鸟瞰图来受益于域间路由的各个方面，例如收敛属性、策略冲突解决、域间故障排除和协作安全。除了提出的范例，我们引入了一个公开的仿真平台，建立在Mininet和Quagga路由软件之上，用于在混合BGP-SDN AS级网络中进行实验。作为概念验证，我们特别关注利用多域集中化来改善BGP的缓慢收敛。我们构建并公开了针对此用例定制的第一个多AS控制器，并通过实验证明SDN集中化有助于线性减少BGP收敛时间和随着SDN部署扩展的流失率。
英文摘要：
In this work, we propose a radical, incrementally-deployable Internet routing paradigm in which the control plane of multiple networks is centralized. This follows the Software Defined Networking (SDN) paradigm, although at the inter-domain level involving multiple Autonomous Systems (AS). Multi-domain SDN centralization can be realized by outsourcing routing functions to an external contractor, which provides inter-domain routing services facilitated through a multi-AS network controller. The proposed model promises to become a vehicle for evolving BGP and uses the bird's eye view over several networks to benefit aspects of inter-domain routing, such as convergence properties, policy conflict resolution, inter-domain troubleshooting, and collaborative security. In addition to the proposed paradigm, we introduce a publicly available emulation platform built on top of Mininet and the Quagga routing software, for experimenting in hybrid BGP-SDN AS-level networks. As a proof of concept we focus specifically on exploiting multi-domain centralization to improve BGP's slow convergence. We build and make publicly available a first multi-AS controller tailored to this use case and demonstrate experimentally that SDN centralization helps to linearly reduce BGP convergence times and churn rates with expanding SDN deployments.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
