Cloud Enterprise Network (CEN) is a highly available network built on the global private network of Alibaba Cloud, which offers high performance and low latency.
You can use CEN to establish private network connections between virtual private clouds (VPCs) in different regions, or between VPCs and data centers. CEN can automatically distribute and learn routes. This helps accelerate network convergence, improve the quality and security of cross-network communication, and connect all network resources. You can use CEN to build enterprise-class networks that provide high-performance network communication.
CEN consists of the following components:
- CEN instances
CEN instances are basic network resources that are used to create and manage interconnected networks.
After you create a CEN instance, you can connect different networks by attaching them to the CEN instance. To connect networks deployed on a global scale, you must purchase a bandwidth plan and allocate bandwidth for cross-region connections.
- Network instances
Network instances that are attached to a CEN instance can communicate with each other. You can attach the following network instances to a CEN instance: VPCs, virtual border routers (VBRs) and Cloud Connect Network (CCN) instances.
- Bandwidth plans
No bandwidth plan is required if you want to connect network instances within the same region. To connect network instances in different regions, you must purchase a bandwidth plan for the areas to which the networks belong and allocate bandwidth for cross-region connections. Each area contains one or more Alibaba Cloud regions. You can view the supported areas in the CEN console.Note
By default, CEN provides bandwidth of 1 Kbit/s to test network connectivity. To ensure that your workloads run as expected, you must purchase a bandwidth plan and allocate bandwidth for cross-region connections.
For example, if you want to connect network instances in the China (Beijing) region and network instances in the China (Hangzhou) region, you must purchase a bandwidth plan and set both areas to mainland China. Then, set the cross-region bandwidth for the connections between the network instances in the China (Beijing) and China (Hangzhou) regions.The following table describes the relationship between regions and areas.
Area Region Mainland China China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Hangzhou), China (Shanghai), and China (Chengdu) North America US (Silicon Valley) and US (Virginia) Asia Pacific China (Hong Kong), Singapore (Singapore), Malaysia (Kuala Lumpur), Japan (Tokyo), Indonesia (Jakarta), and India (Mumbai) Europe Germany (Frankfurt) and UK (London) Australia Australia (Sydney)
CEN provides a new feature: transit routers. Alibaba Cloud has released transit routers as new components of CEN.
You can use a transit router to connect network instances in the region where the transit router is deployed, or connect network instances across regions. Transit routers also support route tables, route maps, and cross-region connections. You can create routes and configure route maps on transit routers to meet your networking and network management requirements in different scenarios.
Transit routers are available for a free trial. For more information, see Apply for a free trial of transit routers.
About network transmission
Alibaba Cloud offers a private network that has high performance and low latency. This private network provides a secure cloud computing environment to meet your networking requirements. Packet loss during network transmission may be caused by many factors, such as network stream collisions, underlying network (Layer 2) errors, and other network malfunctions. Alibaba Cloud aims to provide O&M services that can maintain an hourly packet loss rate at the 99th percentile of less than 0.0001% for cross-region connections.
When you use CEN, take note of the following items:
- Only CEN traffic passes through the Alibaba Cloud transmission network. CEN can minimize packet loss in cross-region transmission when you have purchased sufficient bandwidth resources.
- Express Connect circuits that connect mainland China to regions outside mainland China are provided by China Unicom. These Express Connect circuits are optimized and maintained in the same way as the Alibaba Cloud transmission network to minimize packet loss.