Managing Central Networks

Scenarios

After an enterprise router is created, you can create a central network and add the enterprise router to a policy of the central network. In this way, resources can communicate with each other across regions, and network resources in each region can be managed centrally.

If both global DC gateways and enterprise routers are added to a central network, the on-premises data centers can access the cloud.

Constraints

• Before building a central network, you need to create enterprise routers and enable Default Route Table Association and Default Route Table Propagation for them.
  Figure 1 Enabling Default Route Table Association and Default Route Table Propagation for enterprise routers
  
• To enable communication between on-premises data centers and the cloud, you need to create global DC gateways and add them to the central network as attachments.
  

  You can check the regions where global DC gateways are available on the Direct Connect console.

Creating a Central Network

1. Go to the Central Networks page.
2. In the upper right corner of the page, click Create Central Network.
3. Enter the name and description and then configure policies for the central network. Table 1 describes the parameters required for creating a central network.

   Table 1 Parameters for creating a central network

   Parameter	Setting
   Name	Enter a name for the central network.
   Description	Describe the central network for easy identification.
   Policy	Region Add a policy to record your configuration. You need to select a region for the policy. Enterprise Router Add only one enterprise router for a region. All added enterprise routers can communicate with each other by default. 10 kbit/s of bandwidth is provided for testing connectivity between enterprise routers.
   Configuration Fee	The connections to enterprise routers are not free. The price of connections on a central network is determined by the number of pay-per-use enterprise routers.

4. Click OK.

Follow-up Operations

• Add attachments.

  For details, see Managing Attachments.

• Assign cross-site connection bandwidths.

  For details, see Managing Cross-Site Connection Bandwidths.