# InstanceSecondaryInterfaceSpecificationRequest
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Describes a secondary interface specification for launching an instance.

## Contents
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 ** DeleteOnTermination **   
Indicates whether the secondary interface is deleted when the instance is terminated.  
The only supported value for this field is `true`.  
Type: Boolean  
Required: No

 ** DeviceIndex **   
The device index for the secondary interface attachment.  
Type: Integer  
Required: No

 ** InterfaceType **   
The type of secondary interface.  
Type: String  
Valid Values: `secondary`   
Required: No

 ** NetworkCardIndex **   
The index of the network card. The network card must support secondary interfaces.  
Type: Integer  
Required: No

 ** PrivateIpAddress.N **   
The private IPv4 addresses to assign to the secondary interface.  
Type: Array of [InstanceSecondaryInterfacePrivateIpAddressRequest](API_InstanceSecondaryInterfacePrivateIpAddressRequest.md) objects  
Required: No

 ** PrivateIpAddressCount **   
The number of private IPv4 addresses to assign to the secondary interface.  
Type: Integer  
Required: No

 ** SecondarySubnetId **   
The ID of the secondary subnet.  
Type: String  
Required: No

## See Also
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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/InstanceSecondaryInterfaceSpecificationRequest) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/InstanceSecondaryInterfaceSpecificationRequest) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/InstanceSecondaryInterfaceSpecificationRequest)