sd-wan vendors

In recent years, SD-WAN has developed rapidly in the field of industrial applications as a new technology. The acceptance of SD-WAN has been increasing, and various vendors have proposed solutions.

  With the active innovation in the global cloud computing field and the development of cloud computing in China, more and more enterprises have begun to adopt cloud computing technology to deploy information systems, and the cloud awareness and capabilities of enterprises have been continuously enhanced. In order to protect the normal operation of the cloud on the enterprise, enterprises have created new demands on the network. In this context, cloud network convergence came into being.

  SD-WAN has become a new force in the field of cloud network convergence, including Cisco, Huawei, Qingyun, and Shenxin, all of which have launched their own SD-WAN solutions. The basic operators, Alibaba Cloud, Tencent Cloud and other cloud service providers have introduced SD-WAN networking technology to optimize their private networks.

  Second, the typical scene analysis

  Let's first discuss the cloud networking and see how the emergence of the cloud will change the enterprise's networking. Let's take a look at the cloud example of a large enterprise.


  The figure is a simple schematic diagram of a large multinational network. It has built a WAN backbone based on traditional networks. As shown by the red line in the example, the company has two regional data centers in East Asia and North America. Connected through a multinational MPLS VPN and uses IPSec as a backup. The two branch sites on the left access the data centers in East Asia through MPLS VPN and IPSec respectively. They use IPSec as the backdoor link and one branch site on the right. Access to data centers in North America through MPLS VPN.

  Now, the company has decided to move some of its business to the public cloud, while the new business is placed directly on the public cloud. Two VPCs that go online in East Asia need to access data centers in East Asia, one of which is accessed through IPSec and the other through MPLS VPN and backed up using IPSec. The two VPCs that are online in North America connect to the North American data center through IPSec, and introduce a VPC to host the public services on the cloud, and connect to the two VPCs in North America through VPC peering. It can be seen that the networking of large enterprises mostly builds the backbone of the WAN around the network of the network operator. After the VPC is introduced, it will be attached to the network structure of the inventory as some terminal nodes. I won't go into details here.

  For some small businesses or startups, they don't want to buy physical assets such as physical servers and switches at the beginning of the office, so their IT environment will grow natively on the public cloud. Looking at an example of a startup, in the early days of the business, two VPCs were opened for Web services and development testing, and interoperable through VPC peering. As the number of users increased, the company purchased a physical server to support the finance department's office, but it did not have the need to interoperate with the VPC. After that, the company expanded rapidly, divided more departments, and built OA systems and other public data services on the cloud. Considering the scalability in the future, the company chose to network through Transit VPC, connect each VPC and branch network to Transit VPC through IPSec, and open a public service of a dedicated VPC hosting company. Read More;

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Last-modified: 2019-09-13 (金) 18:01:24 (376d)