Process of Connecting Multiple On-Premises Data Centers Across Regions

Step 1: Create an Enterprise Router

1. Create an enterprise router in each region.
2. Create a central network. When creating the central network, create a policy and add the enterprise routers in different regions to the policy.
3. Create a global connection bandwidth to connect on-premises networks from different regions.

Step 2: Attach Global DC Gateways to Enterprise Routers

1. Create a Direct Connect connection in region A and verify the connectivity.
   1. Create a Direct Connect connection to connect the on-premises data center to the cloud over a line you lease from a carrier.
   2. Create a global DC gateway.
   3. Create a virtual interface to connect the global DC gateway to the connection.
   4. Attach the global DC gateway to the enterprise router and view the global DC gateway attachment in the attachment list of the enterprise router.
   5. Configure routes on the network device of the on-premises data center.
   6. Log in to the ECS and use ping to verify connectivity through the Direct Connect connection.
2. Create a Direct Connect connection in region B and verify the connectivity by referring to 1.

Step 3: Assign Cross-Site Connection Bandwidths on the Central Network

Assign cross-site connection bandwidths on the central network based on service requirements.

Step 4: Verify Network Connectivity

Log in to a server in each of the on-premises data center and use ping to verify the network connectivity.