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Understanding OPNFV

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Page 23 of 144

Understanding OPNFV 23 The actual NFV Architectural Framework consists of several components: ● The Network Functions Virtualization Infrastructure (NFVI) is the actual infrastructure on which these services are delivered. NFVI includes: ○ Physical hardware such as servers, storage, network hardware, and ○ Virtual infrastructure such as virtual compute (virtual machines or containerized virtual operating systems), virtual storage, and virtual networks (software defined networking). ● One or more Virtual Network Function (VNF) runs on top of the NFVI, providing the actual software-based versions of network functions. In most cases, these are functions that have replaced traditionally hardware-implemented functions, such as switches, firewalls, and load balancers. This software functionality should be hardware- independent, but often requires hardware optimizations for performance reasons. ● Both the NFVI and the VNFs must be managed, of course, and this is handled by NFV Management and Orchestration (MANO). MANO can be complex, as it must both provision and manage the lifecycle of both software and hardware resources as necessary. NFV MANO usually doesn't act in isolation, interacting with the existing external OSS and BSS landscape. ● Finally, NFV MANO works with metadata that describes services, VNFs, and infrastructure requirements.

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