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Overview

Central Network

Relying on the cloud backbone network, a central network allows you to easily set up a reliable, intelligent enterprise-grade network and manage global network resources on premises and on the cloud. By setting up a central network, you can enable communication between enterprise routers, in the same region or different regions.

Application Scenarios

• Cross-region communication on the cloud: Enterprise routers in different regions are added to a central network as attachments so that resources in these regions can communicate with each other over one network.
  Figure 1 Cross-region communication between enterprise routers
  
• Global network: By flexibly changing the central network policies, you can build a global network more conveniently.

Central Network Constraints

• To use a central network, the following resources must have been created:
  • Enterprise router: used to set up a central network
    

    If you are not the owner of an enterprise router, you cannot use the enterprise router to set up a central network.

• Policy management
  • A central network can only have one policy. If you apply another policy for this central network, the policy that was previously applied will be automatically cancelled.
  • In each policy, only one enterprise router can be added for a region. All added enterprise routers can communicate with each other by default.
  • A policy that is being applied or cancelled cannot be deleted.
• Cross-site connection bandwidth management
  • A cross-site connection bandwidth cannot be changed or deleted when it is being created, updated, deleted, frozen, unfrozen, or is recovering.
  • The total of cross-site connection bandwidths cannot exceed the global connection bandwidth.
  • If a cross-site connection bandwidth is deleted, you will still be billed for the global connection bandwidth.

Configuration Process

Figure 2 shows the process of configuring a central network to manage global network resources.

Figure 2 Central network configuration process

Table 1 Steps for configuring a central network

No.	Step	Description	Reference
1	Create a central network.	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.	Creating a Central Network
2	Assign cross-site connection bandwidth.	After adding enterprise routers in different regions to the same policy, purchase a global connection bandwidth and assign a bandwidth for cross-site connections.	Assigning a Cross-Site Connection Bandwidth

Parent topic: Central Networks