EC2 Instances will not keep elastic IP

Question

So, I don\'t understand what is going on here... I have (3) Micro EC2 Instances which are launched (without elastic ip)

I then go to Network Security->Elast

Answer 1

If you are willing to pay for NAT gateway (per hour charge + per GB traffic processed) , you can create a NAT gateway to make Elastic IP attach to your VPC private Subnet(you need to create route for subnet , point to nat-gateway, and modify your default route point to igw-id).

Any EC2 instance restart will have effect on the Elastic IP afterwards.