IPv6 only subnets

[SabaLal]

Hi there – wondering if this Q needs an update as AWS now supports IPv6 only subnets as well?

A company has multiple VPCs with IPv6 enabled for its suite of web applications. The Solutions Architect tried to deploy a new Amazon EC2 instance but she received an error saying that there is no IP address available on the subnet.
How should the Solutions Architect resolve this problem?

Set up a new IPv4 subnet with a larger CIDR range.

Associate the new subnet with the VPC and then launch the instance.
Ensure that the VPC has IPv6 CIDRs only. Remove any IPv4 CIDRs associated with the VPC.

Set up a new IPv6-only subnet with a large CIDR range. Associate the new subnet with the VPC then launch the instance.

Disable the IPv4 support in the VPC and use the available IPv6 addresses.

[Carlo-TutorialsDojo]

Hello SabaLal,

Thanks for the feedback.

The IPv6-only setting for subnets was just added last month. As per AWS, it takes around 6 months for new features/services to be incorporated into the tests. We will eventually include this feature in future updates.

Let me know if you have further questions.

Regards,

Carlo @ Tutorials Dojo

[Gajendra Sharma]

The Question says: “multiple VPCs with IPv6 enabled for its suite of web applications”. Does “IPV6 enabled” means no IPV4 subnets are present?

[Neil-TutorialsDojo]

Hello Gajendra Sharma,

Good day!
The phrase “multiple VPCs with IPv6 enabled for its suite of web applications” does not necessarily mean that there are no IPv4 subnets present. Instead, it indicates that the VPCs have been configured to support IPv6 in addition to IPv4.
I hope this answers your question.

Regards,
Neil @ Tutorials Dojo