An elastic IP address (EIP) is a static IPv4 address that can be reassigned to various resources in a cloud computing environment. Cloud service providers allocate some of these addresses to their accounts and discharge them back into the shared pool after closing those accounts.

Elastic IP Address Advantages

Because EIPs are static (they stay unaltered until released), they may be dynamically assigned to various cloud resources within a similar cloud account. Dynamic allotment enables users to remap elastic IP addresses to different virtual systems or other platforms within their cloud resources.

Therefore, elastic IP addresses provide resilience and adaptability by dynamically reassigning the IP address from one infrastructure to another. Users may reduce breaks in service when a network device or virtual machine fails and requires replacement.

Elastic IP Addresses Disadvantages

Some cloud service providers charge extra for idle EIPs (addresses not linked to an infrastructure or a running instance). Providers can also restrict the number of elastic IP addresses assigned to an account to stop IPv4 address depletion and promote efficient IP address application. It is recommended to release an EIP back to the pool once it is no longer active.

Common Providers of Elastic IP Addresses

Elastic IP Address Characteristics