# SecondaryNetworkIpv4CidrBlockAssociation
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Describes an IPv4 CIDR block associated with a secondary network.

## Contents
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 ** associationId **   
The association ID for the IPv4 CIDR block.  
Type: String  
Required: No

 ** cidrBlock **   
The IPv4 CIDR block.  
Type: String  
Required: No

 ** state **   
The state of the CIDR block association.  
Type: String  
Valid Values: `associating | associated | association-failed | disassociating | disassociated | disassociation-failed`   
Required: No

 ** stateReason **   
The reason for the current state of the CIDR block association.  
Type: String  
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/SecondaryNetworkIpv4CidrBlockAssociation) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/SecondaryNetworkIpv4CidrBlockAssociation) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/SecondaryNetworkIpv4CidrBlockAssociation)