Reply To: VPC with private addressing – additional CIDR block

[Carlo-TutorialsDojo]

Hello Rafa,

Thanks for posting your question.

Since your primary CIDR block resides within the 10.0.0.0/16 IPv4 range, you can’t add CIDR blocks from other RFC 1918* ranges (172.16.0.0/12 and 192.168.0.0/16). However, you are permitted to add any publicly routable IPv4 CIDR block (non-RFC 1918), hence the answer:

• 34.17.0.0/16
• 100.77.0.0/16

You can refer to this table from AWS documentation for more information.

I hope this helps and let us know if you have any other clarifications.

Regards,

Carlo

• This reply was modified 4 years, 2 months ago by  Carlo-TutorialsDojo.