---
type: resource-type
title: IPAMAllocation
description: aws resource type AWS::EC2::IPAMAllocation
name: IPAMAllocation
lexicon: aws
resource_type: AWS::EC2::IPAMAllocation
---
`AWS::EC2::IPAMAllocation`, a resource type of the aws lexicon.

## Properties

- `IpamPoolId` (`string`, required): Id of the IPAM Pool.
- `Cidr` (`string`, optional)
- `Description` (`string`, optional)
- `IpamPoolAllocationId` (`string`, optional): Id of the allocation.
- `NetmaskLength` (`number`, optional): The desired netmask length of the allocation. If set, IPAM will choose a block of free space with this size and return the CIDR representing it.

## Attributes

- `IpamPoolAllocationId`