This topic describes the differences between Cloud Enterprise Network (CEN) and Express Connect. Both CEN and Express Connect can be used to connect an on-premises data center with a Virtual Private Cloud (VPC) instance to allow access to cloud resources. However, their network connection, route management, and bandwidth management are different.
The following table shows the differences between CEN and Express Connect.
|Network connection||Network-wide interconnection
All networks (VPCs and Virtual Border Routers) associated with a CEN instance are interconnected with each other. A secure, reliable, and high-speed intranet communication channel can be established between any two networks.
|Single point interconnection
Express Connect connections cannot be extended. Specifically, the VPCs or on-premises data centers that are connected through Express Connect can only communicate with the peer VPCs.
|Route management||Dynamic learning
Based on the Fullmesh link, CEN dynamically learns and distributes routes, which improves the convergence of routes, and the quality and security of network communication.
Express Connect requires end-to-end manual route configuration.
|Bandwidth management||Cross-region shared bandwidth package
CEN provides bandwidth packages which are sold by region to facilitate cross-region bandwidth adjustments. Bandwidth packages also help optimize resource allocation and save costs.
The bandwidth of an Express Connect connection must be specified when you create the connection. You can adjust the bandwidth value after you create an Express Connect connection, but you cannot change the connected regions.