title: Auto-assign IPv6 address via AWS and CloudFormation
body: <p>Is there any way to have IPv6 addresses auto-assigned to EC2 instances within an autoscaling group+launch configuration?</p>
  
  <p>VPC and subnets are all set up for IPv6. Manually created instances are ok.
  I can also manually assign them, but I can't seem to find a way to do it in CloudFormation.</p>