After you connect network instances, such as virtual private clouds (VPCs), virtual border routers (VBRs), IPsec-VPN connections, and Cloud Connect Network (CCN) instances, to a Cloud Enterprise Network (CEN) instance, cloud networks and on-premises networks, networks in different regions, and VPCs can communicate with each other. This topic describes the procedure for using CEN and provides use cases.
Prerequisites
The CIDR blocks of the networks that you want to connect do not overlap.
Procedure
Grant permissions on a network instance of another Alibaba Cloud account: If you want to connect a network instance that belongs to another Alibaba Cloud account, you must perform this step. For more information, see Grant a transit router permissions on a network instance that belongs to another Alibaba Cloud account.
Create inter-region connections: If you want to connect network instances across regions, perform this step. For more information, see Manage inter-region connections.
Configure network connectivity: If you do not select all advanced options when you connect a network instance, you must use routing features to configure network connectivity. For example, you can create custom route tables or custom routes. For more information, see Manage routes.
Common scenarios
Enterprise Edition transit routers
Description | References |
Use CEN and Enterprise Edition transit routers to connect VPCs to data centers in the same region | |
Use CEN and Enterprise Edition transit routers to connect VPCs that belong to different regions and Alibaba Cloud accounts | Use Enterprise Edition transit routers to connect VPCs across regions and accounts |
Basic Edition transit routers
Beginning Mach 31, 2022, Basic Edition transit routers are supported only in CCN regions. Other regions support only Enterprise Edition transit routers by default. If you have Basic Edition transit routers in regions that no longer support Basic Edition transit routers, we recommend that you upgrade the transit routers to Enterprise Edition. Enterprise Edition transit routers support more features and provide optimized networking capabilities. For more information, see Upgrade Basic Edition transit routers.
Description | References |
Use CEN and Basic Edition transit routers to connect VPCs that are in the same region | Use Basic Edition transit routers to connect VPCs in the same region |
Use CEN and Basic Edition transit routers to connect VPCs that belong to different regions and Alibaba Cloud accounts | Use Basic Edition transit routers to connect VPCs across regions and accounts |