Three technologies that increase the benefits of SDN and NFV
Changing the way networks are built affects everything from service ordering to problem management. All of these changes must be considered as organizations attempt to create business cases for technology transformations such as software-defined networking and network function virtualization. Standards organizations and industry forums tend to focus on technology goals, not the entire ecosystem, which quickly dissipates technological advantages. For SDN and NFV, as with many development technologies, their benefits were initially reduced capital expenditures. But now operators and other insiders wonder if capital expenditures can really push both technologies to a rapid and comprehensive deployment. The issue here is how to take advantage of the other advantages of both technologies. Fortunately, the following three technologies can help increase the benefits of SDN and NFV: 1. Orchestration and business modeling The first technology that can help add value to SDNs and NFVs is service modeling and top-down choreography. At the heart of the NFV functional model is management and orchestration - released by the ETSI NFV Industry Standards Group. This specific NFV feature is designed to take a virtual functional model and transform it into a peer part of a traditional hardware device such as a router or firewall. The ETSI NFV Industry Standards Group divides business choreography into two levels: service orchestration and resource orchestration. This extension allows operators or vendors to build functional models of services that can then be orchestrated to deploy virtual network capabilities and to control legacy network components. The key to choreography is the model, while SDN and NFV modeling incorporate the notion of an intent model, an abstract description of the external characteristics of a technical system. A virtual network access device may contain six linked virtual functions, but its intention model shows only its function, not its structure. Therefore, anything that can be implemented can be deployed, which helps to move from pushing traditional network devices to SDN and NFV technologies. If the service is modeled from top to bottom, orchestration can replace manual configuration to significantly reduce operational costs. Service changes and failover can be deployed faster, enabling rapid rollout of new services when opportunities and competitive risks arise. Modeling and orchestration are the most important technologies for SDN and NFV. 2. SD-WAN function Software Defined WAN (SD-WAN) is another technology that benefits SDN and NFV. SD-WAN technology builds overlay networks by defining protocols over Layer 2 or Layer 3 - executing on physical network channels. This overlay network can be deployed on any lower-layer technology that supports either channels or virtual wires. Edge devices that understand the topology of virtual network channels can make connections and even connect to the public Internet. This SD-WAN approach is commonly used to separate users and tenants on public cloud services, each of which is independent and isolated. SD-WAN offers the same quality of service and service-level agreements as traditional MPLS virtual private networks or Layer 2 network virtual LANs if the underlying network technology provides service levels. SDNs can be used to build services through NFV hosted functions, SD-WANs can be easily controlled using service modeling and orchestration, and extend service functional models to real-world devices. 3. Open source to promote collaboration Open source can also add the benefits of SDN and NFV. Both SDN and NFV face two difficult issues to solve: The first is that traditional standards organizations adopt a bottom-up approach, and software-based technologies should actually go from top to bottom. The second problem is that equipment suppliers resist technological changes - these changes threaten their short-term profits. Open source projects can build software directly, even if the project starts from the bottom up, but the open source nature means it can change direction and adopt a top-down approach. In addition, multiple open source projects can be used to support specific tasks, each with a different approach and the market choosing the one that offers the most benefit. Open source is based on open source code that prevents any vendor from possessing technology and restricts its deployment. If suppliers adopt their own proprietary methods, then open source services will limit the degree of vendor lock-up or costs. The current advantages of SDN and NFV These three technologies can significantly promote SDN and NFV, but what will happen? When? Service modeling and top-down choreography have appeared in some vendor products and in standard organization discussions. Operators in the United States and Europe have released their own SDN and NFV architecture that includes modeling and orchestration capabilities. AT & T is also beginning to open source its entire infrastructure, which is a crucial step. Many proprietary SDN vendors are already using the SD-WAN overlay network concept and these vendors are now linking their products to both cloud and NFV, but none of these initiatives are directly applicable to SDN, NFV or cloud computing, possibly due to service Modeling and layout development is not comprehensive. So, those who want to push SDN and NFV quickly now may be pushing SD-WAN technology. Open source is the darling of the industry. Obviously, the mainstream SDN and NFV open source projects have progressed, but if AT & T finds it necessary to create its own architecture first and then open it up, then it has an impact here. 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