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On the Resiliency of Virtual Network Functions

机译：虚拟网络功能的弹性

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摘要

Network functions virtualization is an emerging technology that can significantly improve the flexibility of network service provisioning and offer potential cost savings. However, it is critical that service providers offer high reliability and availability of the network and services when moving from proprietary hardware appliances to virtualized network functions on commodity servers. In a network consisting of physical appliances, providers can deploy redundant hardware and extra capacity to handle failures, although this is quite expensive in practice. Virtualization of network functions lead to more challenges for resiliency, but also bring new opportunities to address these challenges in a more cost-effective manner. In this article, we explain the resiliency requirements for virtual network functions in order to provide carrier grade services, summarize the existing solutions in the literature, highlight several research challenges, and present a concrete case study to demonstrate how to decompose a type of virtual router and thus enhance its resiliency.
机译：网络功能虚拟化是一项新兴技术，可以显着提高网络服务供应的灵活性并节省潜在成本。但是，至关重要的是，当从专有硬件设备转移到商用服务器上的虚拟化网络功能时，服务提供商必须提供高可靠性以及网络和服务的可用性。在由物理设备组成的网络中，提供商可以部署冗余硬件和额外的容量来处理故障，尽管这在实践中非常昂贵。网络功能的虚拟化带来了更多的弹性挑战，但也带来了以更具成本效益的方式应对这些挑战的新机会。在本文中，我们解释了虚拟网络功能的弹性要求，以提供运营商级的服务，总结了文献中现有的解决方案，重点介绍了一些研究挑战，并提出了一个具体的案例研究来演示如何分解一种虚拟路由器从而增强其弹性。

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