# CapacityUsageSummary


The capacity usage summary of the resources used by the [ReferenceSets](API_ReferenceSets.md) in a firewall.

## Contents


 ** CIDRs **   <a name="networkfirewall-Type-CapacityUsageSummary-CIDRs"></a>
Describes the capacity usage of the CIDR blocks used by the IP set references in a firewall.  
Type: [CIDRSummary](API_CIDRSummary.md) object  
Required: No

## See Also


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/network-firewall-2020-11-12/CapacityUsageSummary) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/network-firewall-2020-11-12/CapacityUsageSummary) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/network-firewall-2020-11-12/CapacityUsageSummary)