基于标签的POF网络虚拟化技术研究

针对SDN新一代转发控制分离技术——协议无感知转发(POF),提出了协议字段全开放的SDN网络虚拟化架构。该架构提出了基于标签的网络虚拟化技术和POF物理交换机流表分配技术,通过网络虚拟化中间件将POF交换机与POF控制器之间传递的消息进行转换,对物理网络中传输的数据进行标签封装,从而区分不同网络切片与虚拟链路的流量信息。与已有的虚拟化中间件Flow Visor、Open Virtex、Co Visor等相比,该虚拟化中间件全面支持POF协议,通过物理网络中的数据的标签化处理,实现了SDN转发平面全字段开放的网络虚拟化。同时,基于该套架构,实现了POF网络虚拟化中间件系统POFHyper Visor,并验证了该POF网络虚拟化中间件系统的功能与性能,经测试,虚拟化消息处理能力损失在17.1%~29.9%。

Label-based POF Network Virtualization

Based on a new-generation forwarding control separation technology of the SDN - Protocol Oblivious Forwarding (POF) , A SDN network virtualized architecture and middleware with all packet data open is proposed, which is based on the label-based network virtualization technology and the POF physical switch flow table allocation technology. The network virtualization middleware transfer the message between POF switches and POF controller to virtualize the network substrate. The packet transferred in substrate network is labeled to distinguish between different network slices and virtual link traffic information. Compared with the existing virtualization middleware FlowVisor, OpenVirtex, CoVisor, etc, the virtualization middleware fully supports the POF protocol.,Through the physical network data label processing, the network application achieves the SDN network forwarding plane full field open. Based on this architecture, the POF network virtualization middleware system POFHyperVisor is implemented, The function and performance of the POF network virtualized middleware system is also verified. The loss of virtualized message processing ability is tested between 17.1-29.9% .