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Subnet IPv4 CIDR Block

I have a legacy VPC that was created with an IPv4 CIDR of 10.1.0.0/24, there is one public subnet that shares the same range 10.1.0.0/24

I am trying to create a new private subnet in the VPC so that I can have a lambda access private resources as well as make requests to the internet but I am struggling to find a valid IPv$ CIDR block for the new subnet.

What is a range that would fit within these parameters?

Solution

  • It appears that your one subnet is using the entire IP range allocated to that VPC. Typically, a larger range would be assigned to a VPC (eg /16).

    Fortunately, you can Edit CIDRs and Add new IPv4 CIDR to the VPC, such as 10.1.1.0/24. You can then add a subnet with that additional IP range.