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AWS IPv6 address to Existing EC2 and VPC Guide

Apple now forcing app developers to upload IOS builds with backend apis having support of IPv6 only. So sooner or later you have to add support of ipv6. 

Here is guide to setup ipv6 in AWS having ubuntu instance.

1. Go to VPC console and select existing vpc:
Actions > Edit CIDRs > in block "VPC IPv6 CIDRs" Associate auto IPv6 CIDR Block > Update
2. Go to VPC console > Subnets > Select subnets one by one and do following for all or yours selected one:
Actions > Edit IPV6 CIDRs > Associate auto IPv6 CIDR Block > Update
Actions > Modify Auto Assign IP Settings > Check both ipv4 and ipv6

3. Go to VPC Console > Route Tables :