I just added another CIDR with /16 ip addresses to my VPC ipv4. How is this possible. Is there not a maximum of /16 like described here?
https://docs.aws.amazon.com/vpc/latest/userguide/how-it-works.html#VPC_Sizing
1 Answers
The maximum size of any single IPV4 network in a AWS VPC is /16. That is 256*256 (65,536 IP addresses). As per your config, your first network is 172.31.0.0/16
However, you can have additional networks in your VPC, as you have with your second network in you config (172.32.0.0/16).
(The number of such additional networks is limited to 5 - however this is adjustable by contacting the AWS support staff)
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