Parameters:
  SubnetId:
    Type: AWS::EC2::Subnet::Id
  SecurityGroupId:
    Type: AWS::EC2::SecurityGroup::Id
Resources:
  NetworkInterface:
    Type: AWS::EC2::NetworkInterface
    Properties:
      Description: "a network interface"
      GroupSet:
        - !Ref SecurityGroupId
      SourceDestCheck: false
      SubnetId: !Ref SubnetId
      Ipv6Addresses:
        - Ipv6Address: abc
      Ipv6AddressCount: 1
