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Now we will explain everything you want to know about network function virtualization (NFV) and CCIE exams. ETSI is selected to be the home of industry specification group for NFV by seven world’s leading telecom network operators. A large community is working on developing the required standards for NFV and sharing their NFV implementation and testing experience. The ISG NFV membership has grown to over 290 individual companies out of which 38 are the world’s largest service providers. NFV continues the revolution that begins with SDN in 2009. SDN is more about network virtualization and orchestration at OSI layer 2-3 and NFV more at layer 4-7. Over the past few decades there are biggest changes in the networking landscape due to NFV and SDN combination. The SDN and NFV combination is to move from system based to software model. Across the vendors both south and northbound interfaces are standardized across vendors which break off the hegemony of a single vendor controlling the ecosystem and locking customers into its software and hardware product cycles. The whole thing runs on a set of common of the shelf hardware but these are white boxes unlike system based networking. Three big components involved here are described as under.

  • Virtualized Network Functions(VNFs)
  • Network Function Virtualization Infrastructure (NFVI).
  • Management and Network Orchestration (MANO).

Virtual Network Functions are software implementations of network functions that can be deployed on Network Functions Virtualization Infrastructure( NFVI) like vFW, VLB, vPCRF, vIMS etc.