Floating IP is a public IPv4 address that can be instantly moved from one server to another within the same region.
What is a Floating IP address?
Floating IP is a public IP address that can be instantly moved from one server to another within a Project and in the same region. When attached, the address is dedicated to a specific server, until you unassign it.
How does a Floating IP address work?
After you create a Floating IP address and assign it to your server, you may start receiving public traffic to this IP address being routed to a selected server. As illustrated below, when you receive a packet to your Floating IP address (203.0.113.50), the router automatically passes it forward to the server to which your Floating IP is attached (198.51.100.10).
There is a maximum amount of Floating IP addresses you can have, which is 4 Floating IPs per server within your Team. For instance, if you have 5 servers in a Team, you can order up to 20 Floating IP address. In case you need more than that, you should order an IP Subnet range.