Connect network instances created in the same region but by different accounts

Step 1: Use Account A to create a CEN instance

1. Log on to the CEN console.
2. On the Instances page, click Create CEN instance.
3. Set the following parameters to create a CEN instance:
   • Name: Enter a name for the CEN instance. The name must be 2 to 128 characters in length and can contain digits, underscores (_), and hyphens (-). The name must start with a letter or Chinese character. In this example, DifferentAccountSameRegion is entered.
   • Description: Enter a description for the CEN instance. You can leave this parameter empty. The description must start with a Chinese character or English letter, and cannot start with http:// or https://. The description must be 2 to 256 characters in length, and can contain Chinese characters, English letters, characters and letters from other languages, digits, hyphens (-), periods (.), and underscores (_).

   • Attach Network:

     • Network Type: Select the type of the network instance that you want to attach. Supported network instances are VPCs, VBRs, and CCN instances. In this example, VPC is selected.
     • Region: Select the region where the network instance is created. In this example, China (Qingdao) is selected.
     • Networks: Select the network instance that you want to attach. In this example, a VPC is selected.
4. Obtain the ID of the CEN instance that you created.

   In this example, the ID of the CEN instance is cen-xxxxxxxxxx4l7.

Step 2: Use Account B to grant Account A the permissions to attach network instances

This example shows how to attach a VPC created by a different account to a CEN instance. You can also attach a VBR or a CCN instance.

1. Log on to the VPC console with Account B.
2. In the left-side navigation pane, click VPCs.
3. In the top menu bar, select China (Qingdao).
4. Click the ID of the VPC that you want to attach.
5. On the Authorize Cross Account Attach CEN tab, click Authorize Cross Account Attach CEN.
6. In the dialog box that appears, enter the ID of the account that is used to create the CEN instance and the ID of the CEN instance, and then click OK.

Step 3: Use Account A to attach the network instance

After the permissions are granted, Account A can attach the network instance created by Account B:

1. Log on to the VPC console with Account A.
2. On the Instances page, find the CEN instance that you want to manage, click Manage in the Actions column.
3. On the Networks page, click Attach Network and set the following parameters to attach a network instance:
   • Account: Select Different Account.
   • Owner Account: Enter the ID of the account to which the network instance that you wan to attach belongs. In this example, the ID of Account B is entered.
   • Network Type: Select the type of the network instance that you want to attach. Supported network instances are VPCs, VBRs, and CCN instances. In this example, VPC is selected.
   • Region: Select the region where the network instance is created. In this example, China (Qingdao) is selected.
   • Networks: Select the network instance that you want to attach. In this example, the VPC on which you have acquired the permissions is selected.

Step 4: Test the connectivity

Log on to an Elastic Compute Service (ECS) instance in one of the attached network instances. Then, ping the private IP address of an ECS instance in another attached network instance to test the connectivity.