Using a Cloud Connection to Connect VPCs in Different Regions and Accounts

Solution Architecture

A company has two Huawei accounts (accounts A and B). Account A has a VPC in CN North-Beijing4 and account B has a VPC in CN East-Shanghai1.

To connect the two VPCs, the company needs to create a cloud connection and load the VPCs to the cloud connection.

Figure 1 Connecting VPCs in different regions and accounts

Network and Resource Planning

Network Planning

Procedure

Preparations

Before creating a cloud connection, you need to:

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: (Optional) 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.

In this example, no VPCs (one in CN North-Beijing4 and the other in CN East-Shanghai1) are outside the Chinese mainland, so no cross-border permit is required. You can skip this step.

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 6 Online cross-border permit application

   Parameter	Description
   Applicant Name	The applicant name, which 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. Move you cursor over 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(M)	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 7 Required materials

   Parameter	Description	Required Material	Signature	Seal
   Business License	Upload a photo of the business license with the official seal. For the position of the seal, see the template provided by Huawei Cloud.	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.
   

   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, the cross-border permit is ready for use.

Step 2: Create a Cloud Connection

Create a cloud connection and name it cc-test in account A.

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 8.
   Figure 3 Creating a cloud connection
   

   Table 8 Parameters for creating a cloud connection

   Parameter	Description	Example Value
   Name	Specifies the cloud connection name. The name can contain 1 to 64 characters. Only letters, digits, underscores (_), hyphens (-), and periods (.) are allowed.	cc-test
   Enterprise Project	Specifies an enterprise project by which cloud resources and members are centrally managed.	default
   Scenario	VPC: VPCs or virtual gateways can use this cloud connection.	VPC
   Tag	Specifies the tag to identify the cloud connection. A tag consists of a key and a value. You can add up to 20 tags to a cloud connection. 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.	-
   Description	Provides supplementary information about the cloud connection. The description can contain no more than 255 characters.	-

4. Click OK.

Step 3: (Optional) Create VPCs and ECSs

Perform the following operations to create VPCs and ECSs. If you already have VPCs and ECSs, skip this step.

Constraints

• The CIDR blocks of the VPCs to be connected cannot overlap with each other.

  Overlapping VPC CIDR blocks will cause route conflicts. If the VPCs have overlapping CIDR blocks, you need to modify the CIDR blocks.

• In this example, the two ECSs are in different security groups. You need to add rules in Table 4 to the security groups to allow access to each other.

Procedure

Step 4: Request Permission to Use the VPC in Another Account

If the VPC in your account (account A) needs to communicate with that in another account (account B), ask account B to grant you (account A) the permission to load their VPC to your cloud connection.

In this example, log in to the console as account B and take the following steps to grant account A the permission to load account B's VPC to account A's cloud connection:

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 9.
   Figure 4 Cross-account authorization
   

   Table 9 Parameters for cross-account authorization

   Parameter	Description	Example Value
   Region	Specifies the region where the VPC is located.	CN East-Shanghai1
   VPC	Specifies the VPC you want to authorize.	VPC-B
   Peer Account ID	Specifies the ID of the peer account.	ID of account A
   Peer Cloud Connection ID	Specifies the ID of the peer cloud connection that the VPC is to be loaded to.	ID of the cloud connection cc-test created in account A
   Remarks	Provides supplementary information about cross-account authorization.	-

4. Click OK. Account A can access the resources in VPC-B of account B.

Step 5: Load Network Instances

Load the VPCs that need to communicate with each other to the cloud connection you have created.

In this example, log in to the console as account A and take the following steps to load VPC-A and VPC-B to cloud connection cc-test:

Load VPC-A in account A to cc-test.

1. Go to the Cloud Connections page.
2. Click the name of the cloud connection to go to the Basic Information tab.
3. Click the Network Instances tab.
4. Click Load Network Instance.
   Configure the parameters based on Table 10 and click OK.

   Table 10 Parameters for loading network instances in the same account as the cloud connection

   Parameter	Description	Example Value
   Account	Specifies the account that provides the network instance.	Current account
   Region	Specifies the region where the VPC you want to load is located.	CN North-Beijing4
   Instance Type	Specifies the type of the network instance that needs to be loaded to the cloud connection. There are two options: VPC 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.	VPC-A
   VPC CIDR Block	Specifies the subnets in the VPC and custom CIDR blocks. If you have set Instance Type to VPC, you need to configure the following two parameters: Subnet Other CIDR Block: Add one or more custom CIDR blocks as needed.	Subnet-A
   Remarks	Provides supplementary information about the network instance.	-

Load VPC-B in account B to cc-test.

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

   Configure the parameters based on Table 11 and click OK.

   Table 11 Parameters for loading a network instance in a different account from the cloud connection

   Parameter	Description	Example Value
   Account	Specifies the account that provides the network instance.	Peer account
   Peer Account ID	Specifies the ID of the peer account.	ID of account B
   Region	Specifies the region where the VPC you want to load is located.	CN East-Shanghai1
   Peer Project ID	Specifies the project ID of the VPC in the peer account.	Project ID of account B
   Instance Type	Specifies the type of the network instance that needs to be loaded to the cloud connection.	VPC
   Peer VPC	Specifies the VPC to be loaded.	ID of VPC-B
   VPC CIDR Block	Specifies the CIDR block of the VPC that you want to load to the cloud connection.	Subnet-B
   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.

Step 6: 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.

In this step, log in to the console as account A.

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.

1. Go to the Buy Bandwidth Package page.
2. Configure the parameters based on Table 12 and click Next.

   Table 12 Parameters for buying a bandwidth package

   Parameter	Description	Example Value
   Basic Information
   Billing Mode	Specifies the billing mode of the bandwidth package. The only option is Yearly/Monthly. You can purchase it by year or month as needed.	Yearly/Monthly
   Name	Specifies the bandwidth package name. The name can contain 1 to 64 characters. Only digits, letters, underscores (_), hyphens (-), and periods (.) are allowed.	bandwidthPackge-test
   Enterprise Project	Specifies an enterprise project by which cloud resources and members are centrally managed.	default
   Tag (Optional)	Specifies the tag to identify 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.	-
   Bandwidth Details
   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 communication within a geographic region or between geographic regions. There are two options: Single geographic region: Use the bandwidth package for communication between regions in the same geographic region. Across geographic regions: Use the bandwidth package for communication between regions in different geographic regions.	Single geographic region
   Geographic Region	Specifies the geographic regions.	Chinese mainland
   Bandwidth (Mbit/s)	Specifies the bandwidth you require for communication between regions. 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. Unit: Mbit/s	10
   Required Duration	Specifies how long you require the bandwidth package for. Auto renewal is supported.	1
   Cloud Connection	Specifies the cloud connection you want to bind the bandwidth package to. There are two options: Bind now Bind later	Bind later

3. Confirm the configuration and submit your order.

   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 the cloud connection.

Binding a Bandwidth Package to a Cloud Connection

Bind the purchased bandwidth package to the created cloud connection.

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

Step 7: Assign an Inter-Region Bandwidth

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

In this step, log in to the console as account A.

1. Go to the Cloud Connections page.
2. Click the name of the cloud connection to go to the Basic Information tab.
3. Click the Inter-Region Bandwidths tab.
4. Click Assign Inter-Region Bandwidth and configure the parameters based on Table 13.

   Table 13 Parameters required for assigning an inter-region bandwidth

   Parameter	Description	Example Value
   Regions	Specifies the regions of the network instances that need to communicate with each other. Select two regions.	CN North-Beijing4 CN East-Shanghai1
   Bandwidth Package	Specifies the purchased bandwidth package that will be bound to the cloud connection.	bandwidthPackge-test
   Bandwidth (Mbit/s)	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.	10

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.