# AliasRoutingConfiguration
<a name="API_AliasRoutingConfiguration"></a>

The [traffic-shifting](https://docs.aws.amazon.com/lambda/latest/dg/lambda-traffic-shifting-using-aliases.html) configuration of a Lambda function alias.

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

 ** AdditionalVersionWeights **   <a name="lambda-Type-AliasRoutingConfiguration-AdditionalVersionWeights"></a>
The second version, and the percentage of traffic that's routed to it.  
Type: String to double map  
Key Length Constraints: Minimum length of 1. Maximum length of 1024.  
Key Pattern: `[0-9]+`   
Valid Range: Minimum value of 0.0. Maximum value of 1.0.  
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/lambda-2015-03-31/AliasRoutingConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lambda-2015-03-31/AliasRoutingConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lambda-2015-03-31/AliasRoutingConfiguration)