# Infrastructure (VPC) and Plan (configuration)

Infrastructures are abstractions that allow you to create a Virtual Private Cloud (VPC) instance in the DuploCloud Portal. When you create an Infrastructure, a Plan is automatically generated to supply the network configuration necessary for your Infrastructure to run. 

DuploCloud creates a VNET with a default subnet and a default Network Security Group (NSG). The creation of an Infrastructure takes about ten (10) minutes. 

## Creating an Infrastructure

When you create a DuploCloud Infrastructure, you create an isolated environment that maps to a Kubernetes cluster. 

In DuploCloud, an [Infrastructure](/docs/~/changes/i1ah7lBvMELea01fsIga/getting-started/application-focussed-interface/infrastructure.md) maps one-to-one to a VPC in a specified region. It also maps to an [Azure Managed Kubernetes Service](https://azure.microsoft.com/en-us/products/kubernetes-service) cluster that you use for container orchestration. 

When creating an Infrastructure, you specify the number of availability zones, the region, VPC Classless Inter-Domain Routing (CIDR), and a subnet mask. DuploCloud creates two subnets in each availability zone, one private and one public, and sets up routes and a NAT gateway. 

Create a DuploCloud Infrastructure in the DuploCloud Portal:

1. Select **Administrator** -> **Infrastructure** from the navigation menu. 
2. Click **Add**.
3. Define the Infrastructure by completing the fields on the **Add Infrastructure** form. 
4. Select **Enable EKS** to enable EKS for the Infrastructure.
5. Optionally, select **Advanced Options** to specify additional configurations (public and private subnets, for example).
6. Click **Create**. The Infrastructure is created and is listed on the **Infrastructure** page.

![Azure Infrastructure page](/files/VRXHDa8oU8Cn1o67RxuF)

{% hint style="warning" %}
Up to one instance (0 or 1) of an AKS is supported for each DuploCloud Infrastructure.
{% endhint %}

When you create the Infrastructure, DuploCloud creates the following components:

* VPC with 2 subnets (private, public) in each availability zone
* Required security groups
* NAT Gateway
* Internet Gateway
* Route tables
* [VPC peering](/docs/~/changes/i1ah7lBvMELea01fsIga/aws/aws-services/virtual-private-cloud-vpc-peering.md) with the master VPC, which is initially configured in DuploCloud

## About Plans and Infrastructures

Once the Infrastructure is created, a [Plan ](/docs/~/changes/i1ah7lBvMELea01fsIga/getting-started/application-focussed-interface/plan.md)(with the same Infrastructure name) is automatically created and populated with the Infrastructure configuration. The Plan is used to create [Tenants](/docs/~/changes/i1ah7lBvMELea01fsIga/azure/use-cases/tenant-environment.md).

![DuploCloud Plan Details for Infrastructure](/files/Wn5oEzWhml47isbuJGv0)


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