Help Center/ Enterprise Router/ Best Practices/ Using Enterprise Router and Central Network to Migrate the Network Set Up Through a Cloud Connection/ Overview
Updated on 2024-07-02 GMT+08:00
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Overview

Scenario

Before Enterprise Router was launched, you could use Cloud Connect to connect VPCs in different regions. If you want to improve the scalability of a cross-region network and simplify maintenance, you can use Enterprise Router and Central Network to migrate the network.

Relying on the Huawei Cloud backbone network, Cloud Connect allows you to build a central network to easily and securely create and manage global network resources on premises and on the cloud. You can connect enterprise routers in two or more regions to a central network, so that VPCs attached to these enterprise routers can communicate with each other across regions.

This practice describes how you can use enterprise routers and a central network to migrate a network set up through a cloud connection.

For details, see Enterprise Router Service Overview.

Architecture

As shown in Figure 1, the VPCs in three regions (region A, region B, and region C) are connected over a cloud connection. To improve the network scalability and simplify maintenance, you can attach the VPCs to enterprise routers and add the enterprise routers to a central network as attachments, so that these VPCs can communicate with each other.

This process consists of three phases: before migration, during migration, and after migration. The details are as follows:
  1. Before the migration, the VPCs in different regions are connected using a cloud connection.
  2. During migration
    1. Attach the VPCs to an enterprise router in the same region. Ensure that the routes of the cloud connection and of enterprise routers in the VPC route table do not conflict with each other.
    2. Create a central network and use it to connect the enterprise routers in different regions.
    3. Verify that the VPCs can communicate with the central network through the enterprise routers.
  3. After migration: Remove the VPCs from the cloud connection in sequence and then delete the cloud connection.
Figure 1 Migrating a network set up through a cloud connection

Advantages

As a high-performance central hub on the cloud, an enterprise router can connect multiple network instances.
  • Enterprise routers improve network scalability.
  • Enterprise routers support route learning, which frees you from complex configurations and simplifies O&M.

Constraints

Using Enterprise Router and Central Network to migrate a network set up through a cloud connection may cause intermittent disconnections. Submit a service ticket and contact customer service to evaluate the migration solution.

If a service VPC is being used by ELB, VPC Endpoint, NAT Gateway (private NAT gateway), Distributed Cache Service (DCS), or hybrid DNS, this VPC cannot be attached to an enterprise router.

For details about constraints on enterprise routers, see Notes and Constraints.