I have a VPC created with a CIDR block of 10.10.0.0/16. I am trying to subnet that block into some /24's -- ie. 10.10.1.0/24
It wont let me. The error I get is: CIDR Address overlaps with existing Subnet CIDR: 10.10.0.0/16.
My understanding is that I should be able to create subnets within the VPC CIDR block as long as they are smaller than the block. I would expect /24 to fall within a /16.
Every subnet I've tried gives me the same error. In reality, any subnetting of a block is going to have addreses overlapping within the block.
I'm at a loss here and could really use some help.