Alibaba Cloud Express Connect can establish a dedicated private connection between two VPCs in any regions. The connection does not go through the Internet. This allows Express Connect to offer a fast, stable, secure, and dedicated network communication.
As shown in the following figure, assume that you have two VPCs: VPC1 with the CIDR block 172.16.0.0/16 and VPC2 with the CIDR block 192.168.0.0/16.
To establish a connection between VPC1 and VPC2, you need to use the router interface function of Express Connect. First, create a router interface, and set VPC1 as the initiator and VPC2 as the receiver. Then, add two custom route entries.
- Custom route entry added in VPC1
Destination CIDR Next hop type Next hop 192.168.0.0/16 Route interface RI1
- Custom route entry added in VPC2
Destination CIDR Next hop type Next hop 172.16.0.0/12 Route interface RI2
For more details, refer to: