I'm trying to create a Local Zone subnet in us-east-1-dfw-2a, which supports IPv6, using a IPv6 CIDR range that fits in the /56 of its VPC, but I'm getting an invalid subnet range error.
Here's the event from Cloud Trail:
"errorCode": "Client.InvalidSubnet.Range",
"errorMessage": "The IPv6 CIDR '2600:1f18:48a8:REDACTED::/64' is invalid.",
"requestParameters": {
"vpcId": "vpc-REDACTED",
"cidrBlock": "10.2.0.112/28",
"ipv6CidrBlock": "2600:1f18:48a8:REDACTED::/64",
"availabilityZone": "us-east-1-dfw-2a",