Connecting VPCs in Different Accounts and Regions over a Cloud Connection

Process Description

If you want to connect VPCs in your account to those in another account, you can create a cloud connection, request this other account to allow you to load their VPCs to your cloud connection. Then, purchase a bandwidth package and assign bandwidth between regions so that VPCs in these regions can communicate with each other.

If a VPC is outside the Chinese mainland and other VPCs are inside the Chinese mainland, you need to apply for a cross-border permit before you purchase bandwidth packages.

Figure 1 shows an example.

For details about the regions where cloud connections are available, see Region Availability.

Figure 1 How a cloud connection enables VPCs in different accounts and regions to communicate with each other

Figure 2 illustrates how you can enable communication among VPCs that are in different accounts and regions.

Figure 2 Process of enabling communication between VPCs

Preparations

Before creating a cloud connection, you need to sign up for a HUAWEI ID, enable Huawei Cloud services, complete real-name authentication, and top up your account. Ensure that your account has sufficient balance.

1. Sign up for a HUAWEI ID, enable Huawei Cloud services, and complete real-name authentication.
   If you already have a HUAWEI ID, skip this part. If you do not have a HUAWEI ID, perform the following operations to create one:

   1. Sign up for a HUAWEI ID and enable Huawei Cloud services.
   2. Complete real-name authentication.
2. Top up your account.

   Ensure that your account has sufficient balance. For details about how to top up an account, see Topping up an Account.

Step 1: Apply for a Cross-Border Permit

If a VPC you want to connect is outside the Chinese mainland, you need to apply for a cross-border permit.

Skip this step if cross-border communication is not required.

1. Go to the Bandwidth Packages page.
2. On the displayed page, click apply now.

   If the registered address of your business entity is in the Chinese mainland, click here to go to the Cross-Border Service Application System page.

   If the registered address of your business entity is outside the Chinese mainland, click here to go to the Cross-Border Service Application System page.

   

   Select the address for applying for the cross-border permit based on the registration address of your business entity.

3. On the displayed page, select an applicant type, configure the parameters as prompted, and upload the required materials.
   

   Prepare and upload the materials required on the application page.

   Table 1 Online cross-border permit application

   Parameter	Description
   Applicant Name	The applicant name must be the same as the company name in the Letter of Commitment to Information Security.
   Huawei Cloud UID	The account ID to log in to the management console. You can take the following steps to obtain your account ID. Log in to the management console. Click the username in the upper right corner and select My Credentials from the drop-down list. On the API Credentials page, view the Account ID.
   Bandwidth (Mbit/s)	For reference only
   Start Date	For reference only
   Termination Date	For reference only
   Customer Type	Select a type based on the actual situation.
   Country of the Customer	Country where the applicant is located.
   Contact Name	-
   Contact Number	-
   Type of ID	-
   ID Number	-
   Scope of Business	Briefly describe the main business.
   Number of Employees	For reference only
   Branch Location Country	Country where the applicant branch is located. Set this parameter based on the actual situation.

   Table 2 Required materials

   Parameter	Description	Required Material	Signature	Company Seal
   Business License	Upload a photo of the business license with the official seal. For the position of the seal, see the template.	A scanned copy of your company's business license	-	√
   Service Agreement	Download the Huawei Cloud Cross-Border Circuit Service Agreement, fill in the blank, upload the copy of agreement with the signature and official seal. Sign the material on the signature block. Stamp the seal over the signature.	A scanned copy of the Huawei Cloud Cross-Border Circuit Service Agreement	√	√
   Letter of Commitment to Information Security	Download the China Unicom Letter of Commitment to Information Security of the Cross-Border Circuit Service, fill in the blank, and upload the copy of the letter with the signature and seal. Sign the material on the signature block. Stamp the seal over the signature. Specify the bandwidth you estimated and your company name.	A scanned copy of the China Unicom Letter of Commitment to Information Security of the Cross-Border Circuit Service	√	√

4. Click Submit.

Step 2: Create a Cloud Connection

1. Go to the Cloud Connections page.
2. In the upper right corner of the page, click Create Cloud Connection.
3. Configure the parameters based on Table 3.

   Table 3 Parameters for creating a cloud connection

   Parameter	Description
   Name	Specifies the cloud connection name. The name can contain 1 to 64 characters. Only letters, digits, underscores (_), hyphens (-), and periods (.) are allowed.
   Enterprise Project	Provides a cloud resource management mode, in which cloud resources and members are centrally managed by project.
   Scenario	VPC: VPCs or virtual gateways can use this cloud connection.
   Tag	Identifies the cloud connection. A tag consists of a key and a value. You can add 20 tags to a cloud connection. NOTE: If a predefined tag has been created on Tag Management Service (TMS), you can directly select the corresponding tag key and value. For details about predefined tags, see Predefined Tags.
   Description	Provides supplementary information about the cloud connection. The description can contain no more than 255 characters.

4. Click OK.

Step 3: Request Permission to Use the VPC in the Other Account

In this example, the two VPCs are in different accounts. If the VPC in your account (account A) needs to communicate with that in the other account (account B), ask this other account to grant you the permission to load their VPC to your cloud connection. This other account can take the following steps to grant you the permission to load their VPC:

1. Go to the Cross-Account Authorization page.
2. On the Network Instances Authorized by Me tab, click Authorize Network Instance.
3. Configure the parameters based on Table 4.
   Figure 3 Cross-account authorization
   

   Table 4 Parameters for the other account to grant you the permission to load their VPC to your cloud connection

   Parameter	Description
   Region	Specifies the region where the VPC is located.
   VPC	Specifies the VPC to be loaded to your cloud connection.
   Peer Account ID	Specifies the ID of your account.
   Peer Cloud Connection ID	Specifies the ID of your cloud connection that the VPC is to be loaded to.
   Remarks	Provides supplementary information about cross-account authorization.

4. Click OK.

Step 4: Load Network Instances

Load the VPCs that need to communicate with each other to the cloud connection you have created. To load the VPC in the other account, take the following steps:

1. Go to the Cloud Connections page.
2. Click the name of the cloud connection to go to the Basic Information page.
3. Click the Network Instances tab.
4. Click Load Network Instance. In the displayed dialog, select Peer account.

   Configure other parameters based on Table 5 and click OK.

   Table 5 Parameters for loading network instances across accounts

   Parameter	Description
   Account	Specifies the account that provides the network instance. Select Peer account.
   Peer Account ID	Specifies the ID of the other account.
   Region	Specifies the region where the VPC you want to connect is located.
   Peer Project ID	Specifies the project ID of the VPC in the other account.
   Instance Type	VPC Specifies the type of the network instance that needs to be loaded to the cloud connection.
   Peer VPC	Specifies the VPC to be loaded.
   VPC CIDR Block	Specifies the subnets in the VPC you want to load and custom CIDR blocks.
   Remarks	Provides supplementary information about the network instance.

   

   • A network instance can only be loaded to one cloud connection.
   • If a VPC is loaded, the associated virtual gateway cannot be loaded.

5. Click Continue Loading if you need to load another network instance. If you do not need to load another network instance now, close the dialog box and view the loaded network instance on the Network Instances tab.

Step 5: Buy a Bandwidth Package

By default, a cloud connection provides 10 kbit/s of bandwidth for testing cross-region network connectivity. To enable normal communication between regions in the same geographic region or different geographic regions, you need to purchase a bandwidth package and bind it to the cloud connection.

One cloud connection can only have one bandwidth package regardless of if the cloud connection is used for communication within a geographic region or between geographic regions. For example, if network instances are in the Chinese mainland and Asia Pacific, your cloud connection can only have one bandwidth package.

1. Go to the Buy Bandwidth Package page.
2. Configure the parameters based on Table 6 and click Buy Now.

   Table 6 Parameters for buying a bandwidth package

   Parameter	Description
   Billing Mode	The only option is Yearly/Monthly. You can purchase it by year or month as needed.
   Name	Specifies the bandwidth package name. The name can contain 1 to 64 characters. Only digits, letters, underscores (_), hyphens (-), and periods (.) are allowed.
   Billed By	Specifies by what you want the bandwidth package to be billed.
   Applicability	Specifies whether you want to use the bandwidth package for communication within a geographic region or between geographic regions. There are two options: Single geographic region: Use the bandwidth package between regions in the same geographic region. Across geographic regions: Use the bandwidth package between regions in different geographic regions.
   Geographic Region	Specifies the geographic region(s).
   Bandwidth	Specifies the bandwidth you require for communication between regions, in Mbit/s. The sum of all inter-region bandwidths you assign cannot exceed the total bandwidth of the bandwidth package. Assign the bandwidth based on your network plan.
   Tag	Identifies the bandwidth package. A tag consists of a key and a value. You can add 20 tags to a bandwidth package. NOTE: If a predefined tag has been created on TMS, you can directly select the corresponding tag key and value. For details about predefined tags, see Predefined Tags.
   Required Duration	Specifies how long you require the bandwidth package for. Auto renewal is supported.
   Cloud Connection	Specifies the cloud connection you want to bind the bandwidth package to. There are two options: Bind now Bind later

3. Confirm the configuration and click Pay Now.
4. On the payment information page, click Confirm.

   View the bandwidth package in the bandwidth package list. If the status changes to Normal, the purchase is successful.

Bind the purchased bandwidth package to the created cloud connection.

If you choose Bind later when buying a bandwidth package, you need to bind it to the created cloud connection now.

1. Go to the Cloud Connections page.
2. Click the name of the cloud connection to go to the Basic Information page.
3. Click the Bandwidth Packages tab.
4. Click Bind Bandwidth Package. In the displayed dialog box, select the purchased bandwidth package and click OK.

Step 6: Assign Inter-Region Bandwidth

By default, a cloud connection provides 10 kbit/s of bandwidth for testing cross-region network connectivity.

1. Go to the Cloud Connections page.
2. Click the name of the cloud connection to go to the Basic Information page.
3. Click the Inter-Region Bandwidths tab.
4. Click Assign Inter-Region Bandwidth and configure the parameters based on Table 7.

   Table 7 Parameters required for assigning inter-region bandwidth

   Parameter	Description
   Regions	Specifies the regions of the network instances that need to communicate with each other. Select two regions.
   Bandwidth Package	Specifies the purchased bandwidth package that will be bound to the cloud connection.
   Bandwidth	Specifies the bandwidth you require for communication between regions, in Mbit/s. The sum of all inter-region bandwidths you assign cannot exceed the total bandwidth of the bandwidth package. Plan the bandwidth in advance.

5. Click OK.

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

   

   The default security group rules deny all the inbound traffic. Ensure that security group rules in both directions are correctly configured for resources in the regions to ensure normal communication.