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Techboy
Asked: 2023-10-13 23:46:54 +0800 CST

Adding more IP Addresses to a Subnet in AWS

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I have a Subnet with CIDR 10.0.4.0/28 (15 IP addresses), which is now exhausted; so I want to add more IP addresses.

Is it possible to add more IP addresses to the subnet? I see that I can add a second CIDR range to the VPC.

If not, what are the best options, perhaps one of these?:

  1. Create a 2nd subnet (would require more administration and a 2nd Security Gateway, etc.)
  2. Create a 2nd (larger) subnet and migrate everything from the first subnet to this one
  3. Other?
amazon-web-services

1 Answers

  1. Best Answer

    Implement IPv6 and no longer care about the size of private prefixes.

    Although getting the real benefits of IPv6 only subnets will require some design. NAT64 for talking to v4, updated security rules, dual stack for certain subnets.

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