# ModifyIpamRoutingPolicyRegistration
<a name="API_ModifyIpamRoutingPolicyRegistration"></a>

Modifies an existing routing policy registration. You can update the authorized ASNs, maximum prefix length, and other properties of a Route Origin Authorization (ROA).

## Request Parameters
<a name="API_ModifyIpamRoutingPolicyRegistration_RequestParameters"></a>

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see [Common Query Parameters](CommonParameters.md).

 **Asn.N**   
The updated list of Autonomous System Numbers (ASNs) authorized to originate the prefix.  
Type: Array of strings  
Required: Yes

 **Cidr**   
The IP address prefix in CIDR notation identifying the routing policy registration to modify.  
Type: String  
Required: Yes

 **ClientToken**   
A unique, case-sensitive identifier to ensure that the operation completes no more than one time. If this token matches a previous request, the operation ignores the request, but does not return an error.  
Type: String  
Required: No

 **Description**   
A new description for the routing policy registration.  
Type: String  
Required: No

 **DryRun**   
Checks whether you have the required permissions for the operation, without actually making the request, and provides an error response. If you have the required permissions, the error response is `DryRunOperation`. Otherwise, it is `UnauthorizedOperation`.  
Type: Boolean  
Required: No

 **Force**   
Forces the modification even if it conflicts with an announced route. Default: `false`.  
Type: Boolean  
Required: No

 **IpamInternetRegistryAssociationId**   
The ID of the IPAM internet registry association.  
Type: String  
Required: Yes

 **MaxLength**   
The new maximum prefix length that the ASNs are authorized to announce. Must be greater than or equal to the prefix length of the CIDR.  
Type: Integer  
Valid Range: Minimum value of 0. Maximum value of 48.  
Required: No

 **PermitMoreSpecificAnnouncements**   
Specifies whether to permit more specific route announcements than the CIDR prefix. Default: `false`.  
Type: Boolean  
Required: No

## Response Elements
<a name="API_ModifyIpamRoutingPolicyRegistration_ResponseElements"></a>

The following elements are returned by the service.

 **ipamRoutingPolicyRegistrationDelta**   
Information about the routing policy registration delta created by this modification.  
Type: [IpamRoutingPolicyRegistrationDelta](API_IpamRoutingPolicyRegistrationDelta.md) object

 **requestId**   
The ID of the request.  
Type: String

## Errors
<a name="API_ModifyIpamRoutingPolicyRegistration_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

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

For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/ModifyIpamRoutingPolicyRegistration)