动态服务链中上下文感知数据传递的SDN控制器

B. Martini, F. Paganelli, A. Mohammed, M. Gharbaoui, A. Sgambelluri, P. Castoldi
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引用次数: 32

摘要

软件定义网络(SDN)、网络功能虚拟化(NFV)等网络控制和管理技术的最新进展,将使网络能够更灵活、更及时地有效应对应用业务需求。我们认为,SDN和NFV功能可以在下一代业务覆盖网络(ngson)中得到利用,以解决上下文感知的端到端数据交付服务,并在动态配置为虚拟功能时使用自适应的中间盒服务组合。在本文中,我们提出了一个面向服务的SDN控制器,该控制器允许通过动态建立的虚拟中间盒功能序列可编程地提供数据传递路径,从而在NGSON中实现自适应网络服务链的部署。通过这种方式,可以在利用NGSON的上下文感知和自适应能力的同时,满足一组扩展的QoS需求,包括业务数据要遍历的处理功能规范。在实验测试平台上进行了用例分析,以验证所提出的方法在区分业务数据处理的同时优化交换机中转发表的使用的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
SDN controller for context-aware data delivery in dynamic service chaining
Recent advances in network control and management technologies, such as software defined networking (SDN) and network function virtualization (NFV), are expected to make the network effectively able to cope with application service requirements in a more flexible and timely manner. We argue that SDN and NFV capabilities can be exploited in Next Generation Service Overlay Networks (NGSONs) for addressing contex-aware end-to-end data delivery services with adaptive composition of middlebox services when dynamically provisioned as virtual functions. In this paper we present a Service-Oriented SDN controller that allows for the programmable provision of data delivery paths through a dynamically established sequence of virtual middlebox functions, thereby accomplishing the deployment of adaptive network service chains in NGSON. In this way, an extended set of QoS requirements can be addressed that include specifications on processing functions to be traversed by service data while taking advantages from context-awareness and self-adaptation capabilities of NGSON. A use case analyis have been carried out on an experimental testbed about the effectiveness of the proposed approach in differentiating service data processing while optimizing the use of forwarding tables in the switches.
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