User Story:

As a (user persona), I want my single-stack IPv6 workloads (i.e. pods) to be able to reach services on the internet, within the same VPC or across VPC over IPv4.

The motivation is that not all services on the internet support IPv6 yet. Can this be optional?

Acceptance Criteria:

Description of criteria:

• Subnets attribute EnableDns64 set to true
• Route tables associated with private subnets should have a route for destination 64:ff9b::/96 forwarded to NAT gateways (in the same AZ).

(optional) Out of Scope:

Detail about what is specifically not being delivered in the story

Engineering Details:

• Routes for private subnets: https://github.com/kubernetes-sigs/cluster-api-provider-aws/blob/4e912b4e4d1f855abf9b5194acaf9f31b5763c57/pkg/cloud/services/network/routetables.go#L402-L426 

This requires/does not require a design proposal.
This requires/does not require a feature gate.