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Can someone please explain Subnet Overlapping with an example ? I'm preparing for AWS CSA and I came across this term. I tried few resources but it's not 100 % clear to me.

Thanks a lot in advance.

ANT
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1 Answers1

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AWS does not use the term "Subnet Overlapping", but there's a few rules around overlapping subnets:

  • Within a VPC, the CIDR range assigned to subnets cannot overlap
  • When using VPC Peering to connect two VPCs, the VPC range cannot overlap

For advice on preparing for the AWS Certified Solutions Architect - Associate exam, see: https://aws.amazon.com/certification/certification-prep/

(I always recommend reading the Amazon EC2 and Amazon S3 manuals, as well as reading the FAQs and whitepapers referred to by that page.)

John Rotenstein
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  • Many thanks John ! I guess I wanted to know more about subnet overlapping in general. – ANT Sep 15 '15 at 23:59
  • @John Rotenstein I arrived at your answer from the AWS docs (which use the term overlapping) a few times. http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.html – 3z33etm Jan 20 '17 at 17:49