The SD-WAN architecture attempts to abstract most of the network infrastructure currently connected to various regional networks (LANs) through Internet service providers. The SD-WAN architecture creates flow tables through SDN controllers without relying on edge router routing. table. For example, if Internet-bound traffic from the LAN is sent to branch offices located throughout the country, packet routing depends on how the SDN controller sets up the flow table. If you need to change the routing configuration, you will need to make changes on the controller and propagate the generated flow table to the relevant network device. This is different from traditional network configurations, where administrators responsible for various servers must work with the network team to ensure that applications can communicate with applications at remote locations through existing network infrastructure. Although SD-WAN engineers may not normally be the actual positions, network and system administrators must understand the relevant concepts. Network engineers who are unfamiliar with virtualization, server applications, and server operating systems are bound to fall behind. In addition, since the SD-WAN architecture is considered a solution for Multiprotocol Label Switching (MPLS), relevant practitioners should be familiar with the various existing SDN protocols (such as OpenFlow and OpFlex) and have fewer pours on traditional routing. Attention. The advantages of the SD-WAN architecture have not yet been fully realized, but enterprises will gradually push the technology to the mainstream of the industry. With the continuous investment and development of SD-WAN by large companies like Cisco and Verizon, SD-WAN will eventually become the industry. Mainstream, network administrators should be familiar with SD-WAN as soon as possible.

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