数据中心云网融合架构(云数据中心安全架构)

The basis of the cloud-to-digital transformation strategy is cloud-network integration, that is, on the basis of the existing network, the cloud is added through technological innovation , so that the two can be well integrated to build a new information infrastructure that integrates cloud and network.

“China Telecom was the first telecom operator to propose the concept of cloud-network integration development, and released the industry’s first cloud-network integration white paper in 2018.” Li Zhengmao mentioned, With the rise of cloud computing technology, everyone has realized that the storage and processing of information are becoming more and more powerful, just like the human brain. For the brain to function, it must proceed through the nerve center, the network. In this case, the two become interdependent and inseparable.

Li Zhengmao said, "It is based on this metaphor that we proposed to turn the past simple network operation into a cloud-network integrated operation, that is, according to 'the network is the foundation, the cloud is the core, and the network The sixteen-character strategic direction of "Follow the Cloud, Integrate Cloud and Network" strives to consolidate the foundation for the development of the digital economy."

After continuous practice and exploration, in 2020, China Telecom released "Cloud and Network Integration 2030" Technical White Paper" has received positive response from the industry. "We are full of confidence in the future development of cloud and network integration." Li Zhengmao said.

Promote the in-depth development of reform to stimulate the vitality and motivation of enterprises:

“Reform is our driving force.” Li Zhengmao said, In the process of implementing the cloud-to-digital transformation strategy, it is necessary to solve the reform problem of institutional mechanisms. Only through reform can many goals be achieved.

2021 is a critical year for the three-year action of state-owned enterprise reform. For China Telecom, it must fully implement the three-year action plan for reform and advance the reform in depth. On the one hand, it must deepen the modern enterprise system, on the other hand, it is to deepen the reform of institutional mechanisms, focusing on mixed ownership reform and technology-based enterprise reform.

The popularity of virtualization technology has brought new pressure to network traffic, forcing IT departments to re-examine existing traditional three-layer network solutions. The design features of these layered networks make it easy to create blocking and delays, while the redundancy capabilities provided are primitive.

The traditional structure of the network is from routers to central switches connected to branch switches. The flat network does not have this structure, but the router is directly connected to the switch, the switch is connected to the workstation, and then the switch is connected to another switch, and the switch is also directly connected to the workstation. If you need to add a workstation, just add a switch. Flattening eliminates the aggregation layer, making construction simple and network expansion much simpler.

Currently, Cisco, JUNIPER, and even H3C have proposed reducing the traditional data center network structure from three or more layers to a lower level. What are the advantages and disadvantages of this approach? What are the requirements for applicable scenarios?

The aggregation layer switching ratio can easily be too high, and network congestion is prone to occur during peak network traffic periods . The number of convergence layer switch ports increases, the price is high, and the cost of the data center increases. As for the equipment itself, its forwarding mechanism, computing capabilities, and even higher product architecture requirements, equipment wear and tear will age faster.

There is a view on the Internet that a flat hierarchy can reduce the network interface of the server. This is the main advantage of quantity (saving money), but the disadvantage is that there is no clear hierarchy. The complexity of deployment and maintenance will also increase accordingly. The data center switching network adopts a two-layer structure, while the enterprise network/campus network adopts a three-layer or multi-layer structure, which is mainly determined by application requirements and depends on the application level of the enterprise.