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SD-WAN architecture is an attempt to abstract the majority of the network infrastructure between different LANs through network service providers. The SD-WAN architecture uses an SDN controller to create flow tables relative to routing tables that rely on edge routers.

For example, if the destination of Internet boundary traffic from a local area network is a branch office throughout the country, the routing of the data packets depends on the information flow table set by the SDN controller.

If you need to make changes to the routing configuration, handle it on the controller and allow the generated process table to be sent to the relevant network device. This is different from traditional network configurations where administrators are responsible for the collaboration of various server and network teams to ensure that applications can communicate with remote locations through existing network infrastructure.

Although SD-WAN engineers may not be the actual job, SD-WAN and SDN are usually the concept that network administrators and system administrators must understand in the future. Network engineers who are unfamiliar with virtualization, server applications, and server operating systems will fall behind the times. In addition, because the SD-WAN architecture is considered to be a multi-protocol label switch, you should be familiar with the various existing SDN protocols, such as OpenFlow and SDN OpFlex, while reducing the time spent on some of the more traditional routing protocols.

The advantages of the SD-WAN architecture have not been fully reflected, and company-level applications will slowly help the technology become mainstream. However, large companies like Cisco and Verizon will continue to invest in research and development, and it is wise for network administrators to familiarize themselves with SD-WAN as soon as possible.

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