EIPs are independent public IP address resources, which allow you to decouple public IP addresses from ECS instances and facilitate management.
Independent IP Resource & Flexible Management
An EIP is a NAT IP address that is located in the Internet gateway of Alibaba Cloud and mapped to the associated cloud resource through NAT. After a cloud resource is associated with an EIP, the cloud resource can communicate with the Internet through the EIP.
● A public IP address that can be independently owned
● Works with ECS instances, NAT gateways, and internal-facing SLB instances in a VPC
● Associates with a cloud resource or disassociates from a cloud resource when necessary
● Allows you to migrate IP addresses to Alibaba Cloud with insignificant changes to the system architecture