Overview

An application system relies on the network for internal and external communications. Any network exceptions can result in services interruptions. This makes the HA and DR capabilities of the network architecture crucial. The network design for an application system involves internal and external network connections, IP address management, and domain name resolution.

Huawei Cloud network HA involves the following scenarios:

• Public cloud network: HA for public network connections related to application systems can reduce service interruptions caused by network disconnections.
• Hybrid cloud network: For users using self-built local data centers (IDCs) or other clouds, hybrid cloud network interconnection becomes essential when they need to deploy some services on Huawei Cloud to meet their service development needs. If application systems are deployed across clouds (for example, active/standby DR or active-active DR across clouds), hybrid cloud network connections with HA enabled are required to reduce service interruptions caused by network disconnections.
• Inter-VPC access: When a service system spans multiple departments or teams, separate VPCs isolate their services. These teams and departments must connect across VPCs for mutual access.