How to do it...

  1. Open the VPC dashboard by browsing to https://console.aws.amazon.com/vpc. Select the VPC without IPv6 support. You can see that IPv6 CIDR is blank as shown in the following screenshot: 
Check VPC IPv6 CIDR
  1. Click ActionsEdit CIDRs. The following window will open. Click on Add IPv6 CIDR button. IPv6 CIDR will be associated. Click Close as shown in the following screenshot:
Edit VPC IPv6 CIDR
  1. You can see it reflected in the Summary as well:
VPC Summary after IPv6 Support
  1. Select the subnet associated with the VPC on which ...

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