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In general, you would do this like below. But AWS requires that the ipv6 block of a subnet be no larger than a

/64

and the VPC ipv6 returns a

/56

(in my case at least), so you'll need to manipulate

vpc.ipv6_cidr_block

before passing it into

ec2.Subnet(...)

.

import pulumi
from pulumi_aws import ec2

vpc = ec2.Vpc('main',
            cidr_block='10.0.0.0/22',
            assign_generated_ipv6_cidr_block=True)

subnet = ec2.Subnet('public',
            vpc_id=vpc.id,
            cidr_block=vpc.cidr_block,
            ipv6_cidr_block=vpc.ipv6_cidr_block)