在支持SDN的GENI广域网基础设施上进行虚拟网络迁移
Virtual Network Migration on the GENI Wide-Area SDN-Enabled Infrastructure
摘要：
虚拟网络（VN）包含分配给网络底层中的底层物理资源的虚拟节点和链路的集合。VN迁移是将VN的逻辑拓扑重新映射到一组新的物理资源以提供故障恢复、节能或防御攻击的过程。提供对正在运行的应用程序透明的VN迁移是一项重大挑战。有效的迁移机制高度依赖于部署在物理基底中的技术。之前的工作考虑了数据中心和PlanetLab基础设施中的迁移。然而，很少有针对SDN启用广域网环境的努力-未来网络基础设施的重要组成部分。在这项工作中，我们有兴趣在设计，实施和评估的VN迁移在GENI作为这样一个未来的网络的一个工作例子。我们确定并提出技术，以解决关键的挑战：迁移过程中的资源的动态分配，管理主机连接到VN，流表迁移序列，以尽量减少数据包丢失。我们发现，GENI的虚拟化架构使得透明和高效的迁移具有挑战性。我们建议的替代品，可能会在GENI中采用，是值得采用的虚拟网络提供商，以促进迁移。
英文摘要：
A virtual network (VN) contains a collection of virtual nodes and links assigned to underlying physical resources in a network substrate. VN migration is the process of remapping a VN's logical topology to a new set of physical resources to provide failure recovery, energy savings, or defense against attack. Providing VN migration that is transparent to running applications is a significant challenge. Efficient migration mechanisms are highly dependent on the technology deployed in the physical substrate. Prior work has considered migration in data centers and in the PlanetLab infrastructure. However, there has been little effort targeting an SDN-enabled wide-area networking environment - an important building block of future networking infrastructure. In this work, we are interested in the design, implementation and evaluation of VN migration in GENI as a working example of such a future network. We identify and propose techniques to address key challenges: the dynamic allocation of resources during migration, managing hosts connected to the VN, and flow table migration sequences to minimize packet loss. We find that GENI's virtualization architecture makes transparent and efficient migration challenging. We suggest alternatives that might be adopted in GENI and are worthy of adoption by virtual network providers to facilitate migration.
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。
