Services are typically formed as a composition of SFs (VNFs), with each SF The hosting environment of aįunction is called Service Function Provider or NFVI-PoP (using ETSI NFV On compute, storage and networking resources. ![]() Service functions (SFs), also referred to as VNFs, or just functions, are hosted Service Functions may be instantiatedĪt different points in the network infrastructure such as data center, the WAN, Service Functions provide a range of features such as security, WANĪcceleration, and server load balancing. Service Functions are widely deployed and essential in many networks. Often require configuring multiple devices in a decentralized way. Sometime obscure) protocols and interfaces, which are complex to manage and Running operational network due to the high dependency on proprietary (and Indeed, it is not easy to deploy new mechanisms in a However, this has proved to be tough to put in Their load-aware elastic dimensioning, and dynamic energy policies to reduce the ![]() Virtualization of core servers running in data centers as a way of supporting Operators include: sharing of network infrastructure to reduce costs, Some of the mechanisms that are being considered and already adopted by Significantly reduce the costs incurred in deploying a new service and operating These changes are triggering the need for a modification in the way operatorsĪnd infrastructure providers operate their networks, as they need to Operators need to re-think how to evolve their existing network infrastructuresĪnd how to deploy new ones to address the challenges posed by the increasingĬustomers' demands, as well as by the huge competition among operators. Services much faster, as compared to the traditional use of monolithic and ![]() Virtualization of functions provides operators with tools to deploy new
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