High-Availability Virtual IP Address (Ha-VIP) is a private network IP resource that can be created and released independently. Ha-VIP can be used in conjunction with high-availability software (such as Keepalive) to build high-availability active and standby services and improve business availability.
HAVIPs can be associated with or disassociated from ECS instances or ENIs through ARP announcements.
You can associate each HAVIP with at most 10 ECS instances or 10 ENIs.
Each HAVIP can be associated with two ECS instances. Each ECS instance serves as the primary instance, and the secondary instance for providing services. If the primary ECS is down, the secondary ECS takes over to provide services.
Each HAVIP can be associated with the primary ENIs or secondary ENIs of two ECS instances. If one of the ENIs is down, the secondary ENI can take over to provide services.