Scenarios

Your company has two branches, one in Beijing and the other in Hong Kong, and you have created a VPC for each branch. If the two branches require private network communications and a way to transmit data between the two VPCs, what you need is a cloud connection that links the VPC in the CN North-Beijing4 region to the VPC in the CN-Hong Kong region, so that the two branches can communicate with each other over a private network.

Figure 1 Communications between VPCs in different regions

Solution Design

Configuration Procedure

1. Apply for a cross-border permit.
2. Create a cloud connection.
3. Load the two VPCs.
4. Buy a bandwidth package.
5. Assign inter-region bandwidth.
6. Check the routes and related configuration.

Prerequisites

Applying for a Cross-Border Permit

1. Prepare all required materials.
   1. Log in to the management console.
   2. Hover on the upper left corner to display Service List and choose Networking > Cloud Connect.
   3. In the navigation pane on the left, choose Cloud Connect > Cross-Border Permit.
   4. Click Download Materials.
   5. Print and sign the Cloud Connect Cross-Border Circuit Service Agreement, Letter of Authorization for Representative, and China Unicom Letter of Commitment to Information Security of the Cross-Border Circuit Service, and stamp your company's official seal.
   6. Prepare a scanned copy of your company's business license, of the representative's ID card, of the Cloud Connect Cross-Border Circuit Service Agreement, of the Letter of Authorization for Representative, and of the China Unicom Letter of Commitment to Information Security of the Cross-Border Circuit Service. Ensure that all materials are stamped with your company's official seal.

2. Submit an application.
   1. Log in to the management console.
   2. Hover on the upper left corner to display Service List and choose Networking > Cloud Connect.
   3. In the navigation pane on the left, choose Cloud Connect > Cross-Border Permit.
   4. Click Submit Application.
   5. Fill in the enterprise and representative information, and upload the prepared materials.
   6. Click Submit.

      After you submit the application, the status will change to Pending approval. The review takes about one working day. When the status changes to Approved, you can buy bandwidth packages.

Procedure

1. Create a cloud connection.
   1. Log in to the management console.
   2. Hover on the upper left corner to display Service List and choose Networking > Cloud Connect.
   3. In the navigation pane on the left, choose Cloud Connect > Cloud Connections.
   4. Click Create Connection.
   5. Click Create Cloud Connection. On the displayed page, configure the parameters and click OK.
      Figure 2 Creating a cloud connection
      

2. Load network instances.
   1. Locate the cloud connection, in this case, cloudconnect-001, and click its name.
   2. Click Load Network Instance.
   3. Configure other parameters based on Table 2 and then click OK.

      Table 2 Parameter description

      Parameter	Description	Example Value
      Account	Specifies whether network instances are from the current account or another account.	Current account
      Region	Specifies the region where the VPC you want to connect is located.	CN North-Beijing4 CN-Hong Kong
      Instance Type	Specifies the type of the network instance you want to load to the cloud connection. Two options are available, VPC and Virtual gateway.	VPC
      VPC	Specifies the VPC you want to load to the cloud connection. This parameter is mandatory if you have set Instance Type to VPC.	CN North Beijing4: VPC-01 CN-Hong Kong: VPC-e725
      VPC CIDR Block	Specifies the subnets of the VPC you want to load and the custom CIDR blocks. If you have set Instance Type to VPC, configure the following two parameters: Subnet: Select one or all subnets of the VPC. Other CIDR Block: Add one or more custom CIDR blocks as needed.	Subnet: CN North-Beijing4: subnet-1 (192.168.1.0/24) CN-Hong Kong: subnet-e730 (192.168.0.0/24) Other CIDR Block CN North-Beijing4: 192.168.44.0/24 CN-Hong Kong: 192.168.11.0/24

      Figure 3 Loading network instances
      
   4. In the dialog box indicating that the loading is successful, click Load Another Instance, configure the parameters based on Table 2, and then click OK.
3. Buy a bandwidth package.
   By default, the system allocates 10 kbit/s of bandwidth for testing network connectivity across regions. To ensure normal network communications between regions in the same geographic region or across geographic regions, you need to purchase a bandwidth package and bind it to a cloud connection.

   1. Hover on the upper left corner to display Service List and choose Networking > Cloud Connect.
   2. In the navigation pane on the left, choose Cloud Connect > Bandwidth Packages.
   3. Click Buy Bandwidth Package.
   4. Configure the parameters based on Table 3 and click Buy Now.

      Table 3 Parameter description

      Parameter	Description	Example Value
      Billing Mode	Specifies how you want the bandwidth package to be billed. You can purchase it by year or month as desired.	Yearly/Monthly
      Name	Specifies the bandwidth package name. The name can contain 1 to 64 characters, including digits, letters, hyphens (-), underscores (_), and periods (.).	bandwidthPackge-8047
      Billed By	Specifies by what you want the bandwidth package to be billed.	Bandwidth
      Applicability	Specifies whether you want to use the bandwidth package for network communications within a geographic region or between geographic regions. Two options are available: Single Geographic Region: The regions you assign inter-region bandwidths to are in the same geographic region. Across Geographic Regions: The regions you assign inter-region bandwidths to are in different geographic regions.	Single Geographic Region
      Geographic Region	Specifies the geographic region where regions requiring inter-region bandwidths are located.	Chinese mainland Asia-Pacific
      Bandwidth	Specifies the bandwidth you require for network communications across regions, in Mbit/s. The sum of all inter-region bandwidths you assign cannot exceed the bandwidth of the bandwidth package. Assign the bandwidth based on your network plan.	5
      Required Duration	Specifies how long you require the bandwidth package for. Auto renewal is supported.	1 month
      Enterprise Project	Provides a cloud resource management mode, in which cloud resources and members are centrally managed by project.	default
      Cloud Connection	Specifies the cloud connection you want to bind the bandwidth package to. Two options are available, Bind now and Bind later.	Bind now

   5. Confirm the information and click Pay Now.
   6. Click Pay.

      Go back to the bandwidth package list and locate the bandwidth package. If its status changes to Normal, you can bind the bandwidth package to a cloud connection.

4. Assign inter-region bandwidth.
   1. Log in to the management console.
   2. Hover on the upper left corner to display Service List and choose Networking > Cloud Connect.
   3. In the navigation pane on the left, choose Cloud Connect > Cloud Connections.
   4. In the cloud connection list, locate the cloud connection and click its name.
   5. Click Inter-Region Bandwidths.
   6. Click Assign Inter-Region Bandwidth and configure the parameters based on Table 4.

      Table 4 Parameter description

      Parameter	Description	Example Value
      Regions	Specifies the two regions between which network communications are required.	CN North-Beijing4 CN-Hong Kong
      Bandwidth Package	Specifies the bandwidth package you want to bind to the cloud connection.	bandwidthPackge-8047 (Chinese mainland – Asia Pacific)
      Bandwidth	Specifies the bandwidth you require for communications between regions, in Mbit/s. The sum of all inter-region bandwidths you assign based on the bandwidth package cannot exceed the bandwidth of the bandwidth package. Plan the bandwidth in advance.	5 Mbit/s

   7. Click OK.

      Now the VPCs in two regions can communicate with each other.

5. View the routes and verify the configuration.