Customer-owned subnets for Classic

This topic explains how to use your own public IP addresses on the IBM Cloud Classic platform. If you are looking for how to use your own private IP addresses on the IBM Cloud Classic platform, see Bring Your Own IP Address.

If you want to use your own public IP addresses, instead of the options provided by the IBM Cloud Classic platform, you can use your own public subnets. Using your public subnet gives you full control over the lifecycle and assignment of your public IP addresses and gives you the option to modify any Classic Regional Internet Registry (RIR) registration information that is announced for your subnet.

If you do not have your own public IP ranges, you must first purchase one. Due to the global exhaustion of public IPv4 subnet space, RIR organizations no longer directly offer IPv4 subnets. As a result, you must obtain the IP ranges from a third-party broker. IPv6 space is still readily available directly from RIR organizations.

The minimum subnet size that can be announced from IBM Cloud is /24 for an IPv4 subnet, or /48 for an IPv6 subnet.

After you procure your subnet, create an IBM Support case with the following information:

• List the specific IP ranges that you want to use.

• Provide a Letter of Authority (LoA) for the specific IP ranges to be used.

• Indicate whether this request is for existing servers or a new solution.

• Specify whether you want IBM Cloud to announce your IP ranges, or if you want to announce them yourself. If you prefer to announce your own IP ranges, you are charged a monthly recurring fee for each separate announcement.

  There is no charge if IBM Cloud announces on your behalf.

• Provide any additional questions or requirements.