# Networking
<a name="networking"></a>

This chapter includes information about how Eksctl creates Virtual Private Cloud (VPC) networks for EKS clusters.

## Topics:
<a name="_topics"></a>
+  [VPC Configuration](vpc-configuration.md) 
  + Modify the VPC CIDR range and configure IPv6 addressing
  + Use an existing VPC
  + Customize the VPC, subnets, security groups, and NAT gateways for the new EKS cluster
+  [Subnet Settings](vpc-subnet-settings.md) 
  + Use private subnets for the initial nodegroup to isolate it from the public internet
  + Customize subnet topology by listing multiple subnets per availability zone and specifying subnets in nodegroup configurations
  + Restrict nodegroups to specific named subnets in the VPC configuration
  + When using private subnets for nodegroups, set `privateNetworking` to `true` 
  + Provide a complete subnet specification with both `public` and `private` configurations in the VPC spec
  + Only one of `subnets` or `availabilityZones` can be provided in nodegroup configuration
+  [Cluster Access](vpc-cluster-access.md) 
  + Manage public and private access to the Kubernetes API server endpoints in an EKS cluster
  + Restrict access to the EKS Kubernetes public API endpoint by specifying allowed CIDR ranges
  + Update the API server endpoint access configuration and public access CIDR restrictions for an existing cluster
+  [Updating control plane subnets and security groups](cluster-subnets-security-groups.md) 
  + Update the subnets used by the EKS control plane for a cluster
+  [IPv6 Support](vpc-ip-family.md) 
  + Specify the IP version (IPv4 or IPv6) to be used when creating a VPC with EKS cluster

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon EKS. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query eks` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).