Divide the server cluster of a certain scale or a certain type of business into a zone (Pod), and adopt the spine-leaf networking within the Pod. If the network scale is larger, it is necessary to connect multiple Pods by adding a level of Pod Spine switches. Under this three-level Clos architecture, the entire network can support a server scale of more than 100,000 units. The traffic scheduling under the coordination between the server side and the network side can solve the core problem of high-performance Ethernet in the current domestic and international industry, which is achieving zero packet loss under high concurrency and large throughput, and it can meet the requirements of both traditional cloud computing and the networks of new intelligent computing centers.