The continuous expansion of data centers has driven the growing demand for bandwidth and changes in network architecture. Currently, 10GbE switches still account for a large proportion of data center switching equipment, and the proportion of 40GbE and 100GbE switches is gradually increasing. As the demand for bandwidth continues to increase, the development of server ports is driven by 10GbE to 25GbE and 40GbE. This change drives the connection requirements for 100GbE switch ports.
  

  The network architecture as the spine is not only to meet the growth of bandwidth demand, but also to meet the growing demand for network scale. In the network architecture as the spine, leaf-spine switch connect with each other, thus greatly improving the communication efficiency between different servers compared with the traditional three-tier architecture.

Although the information required may come from different sources, such as external customers supporting their underlying cloud services operations, or the internal business units of traditional data centers, the requirements are the same, that is, the need to provide fast service and response. Large networks must be able to be deployed quickly and effectively managed and put into production quickly. this artice from http://www.jfopt.com/news-242.html