I am trying to create some new subnets and cannot get AWS to accept a CIDR IP4.
I receive the message: Must be valid IPv4 CIDR. Nothing I try is accepted.
What is a valid IP4 for this purpose, and why? See attached image>
I tried :
- 10.0.0.1/16
- 10.0.1.0/16
- 10.1.0.0/16
- 10.0.0.255/16
- 10.255.255.255/16
- 128.128.128.128/16
- 10.0.0.16/24
- 10.0.0.14/24 ... this list goes on a bit. I also tried various CIDR calculators online which didn't give me a correct subnet IP4. Obviously without understanding what i'm being asked to input trying random numbers is useless. I also read the documentation on amazon, which made no sense to me, hence me asking this question. Can someone answer what they would enter in this box, so that I can understand by example?