Reserved IP Concepts

DigitalOcean reserved IPs are publicly-accessible static IP addresses that you can assign to Droplets and instantly remap between other Droplets in the same datacenter. Implement a failover mechanism with reserved IPs to build a high availability infrastructure.

Note
The Floating IP service is now called Reserved IPs. The Reserved IP service retains the same functionality as the prior service.

This community tutorial explains what high availability is, why it’s useful, and how to achieve it. High availability is a quality of infrastructure design at scale focused on decreasing downtime and single points of failure.
digitalocean.com/community