AWS::EKS::Cluster KubernetesNetworkConfig - AWS CloudFormation

AWS::EKS::Cluster KubernetesNetworkConfig

The Kubernetes network configuration for the cluster.


To declare this entity in your AWS CloudFormation template, use the following syntax:


{ "ServiceIpv4Cidr" : String }


ServiceIpv4Cidr: String



The CIDR block to assign Kubernetes service IP addresses from. If you don't specify a block, Kubernetes assigns addresses from either the or CIDR blocks. We recommend that you specify a block that does not overlap with resources in other networks that are peered or connected to your VPC. The block must meet the following requirements:

  • Within one of the following private IP address blocks:,, or

  • Doesn't overlap with any CIDR block assigned to the VPC that you selected for VPC.

  • Between /24 and /12.


You can only specify a custom CIDR block when you create a cluster and can't change this value once the cluster is created.

Required: No

Type: String

Update requires: Replacement