Interfaces in the NFV reference architectural framework NFV management 国家重点实验室 and orchestration Os-Ma OSS/BSS Se-Ma Orchestrator Service,VNF,and infrastructure description Or-Vnfm EMS 1 EMS 2 EMS 3 Ve-Vnfm VNF manager(s) VNF 1 VNF2 VNF 3 -Vn-Nf- Or-vil NFVI Vi-Vnfm Virtual Virtual Virtual computing storage network Virtualization layer N1-Vi Virtualized VIHa infrastructure manager(s) Computing Storage Network hardware hardware hardware Execution reference points Other reference points Main NFV reference points Figure 7.8 NFV Reference Architectural Framework 2020/5/21 Dr.Zhangi xu,National Key Lab on ISN,Xidian University 11
End-to-end network service 国家重点实验室 Network Function (NF)Forwarding Graph Endpoint 贝…四-网 Endpoint B Infrastructure Infrastructure Infrastructure network 1 network 2 network 3 (a)Graph representation of an end-to-end network service End-to-end network service VNF-Forwarding Graph 2 Virtual VNF-1 -VNF-2A----VNF-2B VNF-3 Iresources I hosted on VNF-2C iphysical machines Virtualization End point Layer End point Physical link NFVI-PoP IHardware NFVI-PoP resources NFVI-PoP in physical i locations NFVI-PoP (b)Example of an end-to-end network service with VNFs and nested forwarding graphs Figure 7.6 A Simple NFV Configuration Example 2020/5/21 Dr.Zhangi xu,National Key Lab on ISN,Xidian University 12