To connect network instances deployed in different regions, you must create a cross-region connection and set cross-region bandwidth after you purchase a bandwidth plan.

Prerequisites

A bandwidth plan is purchased and a Cloud Enterprise Network (CEN) instance is associated with the bandwidth plan. For more information, see Purchase a bandwidth plan and Associate a bandwidth plan with a CEN instance.

Background information

Before you create a cross-region connection, take note of the following items:
  • CEN provides Basic Edition and Enterprise Edition transit routers based on regions. A Basic Edition transit router and an Enterprise Edition transit router provide similar cross-region connection features. Compared with the Basic edition, an Enterprise Edition transit router allows you to create a cross-region connection for testing. You can test the connectivity before you deploy your business. Therefore, the Enterprise Edition provides better user experiences.

    For more information about how to view the Edition of the current transit router, see View the edition of a transit router. For more information about Basic Edition and Enterprise Edition transit routers, see Transit routers.

  • The sum of all bandwidth values in different regions cannot exceed the bandwidth value of the bandwidth plan.

    For example, a CEN instance is associated with a 20 Mbit/s bandwidth plan that connects the mainland China area to the North America area. You can set cross-region bandwidth between the US (Silicon Valley) region and regions in mainland China such as China (Hangzhou), China (Shanghai), and China (Shenzhen). However, the total sum of these cross-region bandwidth values cannot exceed 20 Mbit/s.

Use an Enterprise Edition transit router to create a cross-region connection

  1. Log on to the CEN console.
  2. On the Instances page, click the ID of the CEN instance that you want to manage.
  3. On the details page, you can use one of the following methods to go to the Connection with Peer Network Instance page and create a cross-region connection:
    • Click the Bandwidth Plans tab and click Set Region Connection.
    • Click the Transit Router tab, find the transit router instance, and then click Create Connection in the Actions column.
      Note
      • If you have not created a transit router in the region, choose the first method to create a cross-region connection. During the process, the system automatically creates a transit router instance.
      • If you have created a transit router instance in the region, you can choose the second method to create a cross-region connection.
  4. On the Connection with Peer Network Instance page, set the following parameters:
    Parameter Description
    Network Type Select Cross-region.
    Region Select the region to be connected.
    Transit Router Select a transit router deployed in the selected region.

    If no transit router is found in the selected region, the system automatically creates a transit router.

    Connection Name Specify a name for the cross-region connection.

    The name must be 2 to 128 characters in length, and can contain digits, underscores (_), and hyphens (-). It must start with a letter.

    Bandwidth Usage Mode CEN supports the following methods to allocate bandwidth:
    • Test Bandwidth: By default, CEN provides bandwidth of 1 Kbit/s for you to test network connectivity.

      If you only want to test the connectivity, you can select Test Bandwidth.

    • Bandwidth Plan: The bandwidth is allocated from a purchased bandwidth plan.

      If you want to create a cross-region connection to between services, select Bandwidth Plan.

    Peer Region Select the peer region to be connected.
    Transit Router Select a transit router deployed in the peer region.

    If no transit router is found in the selected region, the system automatically creates a transit router.

    Bandwidth Plan Select an associated bandwidth plan.

    If you set Bandwidth Usage Mode to Bandwidth Plan, you must set this parameter.

    Bandwidth Specify the bandwidth value. Unit: Mbit/s.

    If you set Bandwidth Usage Mode to Bandwidth Plan, you must set this parameter.

    Note You can specify a bandwidth value based on your business requirements. The sum of all bandwidth values in different regions cannot exceed the bandwidth value of the bandwidth plan.
  5. Click OK.

Use a Basic Edition transit router to create a cross-region connection

  1. Log on to the CEN console.
  2. On the Instances page, find the CEN instance and click the instance ID.
  3. On the details page, you can use one of the following methods to go to the Connection with Peer Network Instance page and create a cross-region connection:
    • Click the Bandwidth Plans tab and click Set Region Connection.
    • Click the Transit Router tab, find the transit router instance, and then click Create Connection in the Actions column.
      Note
      • If you have not created a transit router in the region, choose the first method to create a cross-region connection. During the process, the system automatically creates a transit router instance.
      • If you have created a transit router instance in the region, you can choose the second method to create a cross-region connection.
  4. On the Connection with Peer Network Instance page, set the following parameters:
    Parameter Description
    Network Type By default, Cross-region is selected.
    Region Select the region to be connected.
    Transit Router Select a transit router deployed in the selected region.

    If no transit router is found in the selected region, the system automatically creates a transit router.

    Peer Region Select the peer region to be connected.
    Transit Router Select a transit router deployed in the peer region.

    If no transit router is found in the selected region, the system automatically creates a transit router.

    Bandwidth Plan Select an associated bandwidth plan.
    Bandwidth Specify the bandwidth value. Unit: Mbit/s.
    Note You can specify a bandwidth value based on your business requirements. The sum of all bandwidth values in different regions cannot exceed the bandwidth value of the bandwidth plan.
  5. Click OK.