# LaunchTemplateInstanceNetworkInterfaceSpecification
<a name="API_LaunchTemplateInstanceNetworkInterfaceSpecification"></a>

Describes a network interface.

## Contents
<a name="API_LaunchTemplateInstanceNetworkInterfaceSpecification_Contents"></a>

 ** associateCarrierIpAddress **   
Indicates whether to associate a Carrier IP address with eth0 for a new network interface.  
Use this option when you launch an instance in a Wavelength Zone and want to associate a Carrier IP address with the network interface. For more information about Carrier IP addresses, see [Carrier IP address](https://docs.aws.amazon.com/wavelength/latest/developerguide/how-wavelengths-work.html#provider-owned-ip) in the * AWS Wavelength Developer Guide*.  
Type: Boolean  
Required: No

 ** associatePublicIpAddress **   
Indicates whether to associate a public IPv4 address with eth0 for a new network interface.  
 AWS charges for all public IPv4 addresses, including public IPv4 addresses associated with running instances and Elastic IP addresses. For more information, see the *Public IPv4 Address* tab on the [Amazon VPC pricing page](http://aws.amazon.com/vpc/pricing/).  
Type: Boolean  
Required: No

 ** connectionTrackingSpecification **   
A security group connection tracking specification that enables you to set the timeout for connection tracking on an Elastic network interface. For more information, see [Idle connection tracking timeout](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-connection-tracking.html#connection-tracking-timeouts) in the *Amazon EC2 User Guide*.  
Type: [ConnectionTrackingSpecification](API_ConnectionTrackingSpecification.md) object  
Required: No

 ** deleteOnTermination **   
Indicates whether the network interface is deleted when the instance is terminated.  
Type: Boolean  
Required: No

 ** description **   
A description for the network interface.  
Type: String  
Required: No

 ** deviceIndex **   
The device index for the network interface attachment.  
Type: Integer  
Required: No

 ** enaQueueCount **   
The number of ENA queues created with the instance.  
Type: Integer  
Required: No

 ** enaSrdSpecification **   
Contains the ENA Express settings for instances launched from your launch template.  
Type: [LaunchTemplateEnaSrdSpecification](API_LaunchTemplateEnaSrdSpecification.md) object  
Required: No

 ** GroupSet.N **   
The IDs of one or more security groups.  
Type: Array of strings  
Required: No

 ** interfaceType **   
The type of network interface.  
Type: String  
Required: No

 ** ipv4PrefixCount **   
The number of IPv4 prefixes that AWS automatically assigned to the network interface.  
Type: Integer  
Required: No

 ** Ipv4PrefixSet.N **   
One or more IPv4 prefixes assigned to the network interface.  
Type: Array of [Ipv4PrefixSpecificationResponse](API_Ipv4PrefixSpecificationResponse.md) objects  
Required: No

 ** ipv6AddressCount **   
The number of IPv6 addresses for the network interface.  
Type: Integer  
Required: No

 ** Ipv6AddressesSet.N **   
The IPv6 addresses for the network interface.  
Type: Array of [InstanceIpv6Address](API_InstanceIpv6Address.md) objects  
Required: No

 ** ipv6PrefixCount **   
The number of IPv6 prefixes that AWS automatically assigned to the network interface.  
Type: Integer  
Required: No

 ** Ipv6PrefixSet.N **   
One or more IPv6 prefixes assigned to the network interface.  
Type: Array of [Ipv6PrefixSpecificationResponse](API_Ipv6PrefixSpecificationResponse.md) objects  
Required: No

 ** networkCardIndex **   
The index of the network card.  
Type: Integer  
Required: No

 ** networkInterfaceId **   
The ID of the network interface.  
Type: String  
Required: No

 ** primaryIpv6 **   
The primary IPv6 address of the network interface. When you enable an IPv6 GUA address to be a primary IPv6, the first IPv6 GUA will be made the primary IPv6 address until the instance is terminated or the network interface is detached. For more information about primary IPv6 addresses, see [RunInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RunInstances.html).  
Type: Boolean  
Required: No

 ** privateIpAddress **   
The primary private IPv4 address of the network interface.  
Type: String  
Required: No

 ** PrivateIpAddressesSet.N **   
One or more private IPv4 addresses.  
Type: Array of [PrivateIpAddressSpecification](API_PrivateIpAddressSpecification.md) objects  
Required: No

 ** secondaryPrivateIpAddressCount **   
The number of secondary private IPv4 addresses for the network interface.  
Type: Integer  
Required: No

 ** subnetId **   
The ID of the subnet for the network interface.  
Type: String  
Required: No

## See Also
<a name="API_LaunchTemplateInstanceNetworkInterfaceSpecification_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/LaunchTemplateInstanceNetworkInterfaceSpecification) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/LaunchTemplateInstanceNetworkInterfaceSpecification) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/LaunchTemplateInstanceNetworkInterfaceSpecification)