The Open Network Summit (ONS), organized in April 2019, revisited what can be considered a long-established but promising technology: Network Function Virtualization (NFV). Lean NFV is a new reference architecture that aims to eradicate the complexity that characterizes the traditional approach launched by the European Telecommunications Standards Group (ETSI) NFV Industry Specification Group (ISG) in 2012. Lean NFV arrives on the eve of a collective industry effort to propel NFV forward using cloud tools and new technologies.
Lean NFV identifies three architectural changes as the underlying pillars that will bring about optimum results: the NFV Manager, the computational infrastructure, and the Virtual Network Functions (VNFs), all of which correspond to NFV Management and Orchestration (MANO)/VNF Manager (VNFM), the NFV Infrastructure (NFVi), and VNFs in ETSI’s terminology. However, Lean NFV introduces two new elements, namely a Key-Value (KV) store and an OpenStack-like plug-in approach. The former serves as a single, unified integration point between VNFs, VNFM, and underlying …
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