1. Internal network of data center

Different types of applications have different requirements for data center networks. The front end network usually adopts TCP protocol, and IP/ Ethernet network technology becomes the mainstream of the front end network, with low cost and good scalability. Storage networks have been pursuing large bandwidth and high throughput to maximize disk and CPU efficiency. FC technology with higher Ethernet speeds over the same period was adopted in the late 1990s. In the 20th century, with the scale application of higher speed SSDS, especially the recent emergence of NVMe technology with high speed and low latency, storage requires faster and more efficient networks. The computing network mainly adopts InfiniBand private network, which is typically represented by HPC and other high-performance services. Low delay is its ultimate pursuit. However, with the development of RoCE technology, Ethernet has been widely used in computing network.

In view of the Ethernet is the most complete ecological, the most widely used network technology route, in order to reduce the data center network, the Total Cost of Ownership (TCO, Total Cost of Ownership), the front-end network, storage, network and calculation of the three network technology belong to the etheric is inevitable, which is open ODCC data center committee to carry out the research project of three nets "data center". The TCO of data center network can be greatly reduced and the complexity of networking and operation and maintenance can be significantly reduced by using three-network integration technology.

2. The DCI

In the development process of cloud computing, both the business of cloud service providers and the application requirements of customers require the support of efficient and reliable private networks. DCI enhances the interconnection between data centers within cloud service providers, and digital network collaboration connects clouds or data centers through private networks.

In recent years, cloud computing has developed rapidly with the support of strong network capabilities. With the continuous development of public and private clouds, network infrastructure needs to optimize the network structure to ensure the flexibility, intelligence and operational maintainability of the network, provide differentiated network services, and better meet the needs of cloud computing applications. Digital network collaboration is the inevitable result of cloud computing and network development to a certain stage, and will become a key development direction in the future