# RoutingConfigurationListItem
<a name="API_RoutingConfigurationListItem"></a>

Contains details about the routing configuration of a state machine alias. In a routing configuration, you define an array of objects that specify up to two state machine versions. You also specify the percentage of traffic to be routed to each version.

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

 ** stateMachineVersionArn **   <a name="StepFunctions-Type-RoutingConfigurationListItem-stateMachineVersionArn"></a>
The Amazon Resource Name (ARN) that identifies one or two state machine versions defined in the routing configuration.  
If you specify the ARN of a second version, it must belong to the same state machine as the first version.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** weight **   <a name="StepFunctions-Type-RoutingConfigurationListItem-weight"></a>
The percentage of traffic you want to route to a state machine version. The sum of the weights in the routing configuration must be equal to 100.  
Type: Integer  
Valid Range: Minimum value of 0. Maximum value of 100.  
Required: Yes

## 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/states-2016-11-23/RoutingConfigurationListItem) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/RoutingConfigurationListItem) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/states-2016-11-23/RoutingConfigurationListItem)