CODEWITHSUNDEEP
amazon-web-servicessubnetamazon-vpc
ANT
ANT

Reputation: 87

CIDR Block Overlapping in AWS VPC

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.

Upvotes: 5

Views: 4627

Answers (1)

John Rotenstein
John Rotenstein

Reputation: 269500

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.)

Upvotes: 4

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