CNI & IP Ranges

VPC CNI

For Node and LB

/26 (64 addresses)

For Pod

/21 (2,048 addresses)

• Fixed to 100.64.0.0/21

• IP range assigned to Pods in EKS for CNI Custom Networking

• No direct external connection, unique IP range only within the VPC

VPC CNI

For Node and LB

/25 (128 addresses)

• May vary depending on the customer's IP policy

• If more than 100 IPs are expected for Worker Nodes and LBs, need to expand to /24 or /23

For Pod

/21 (2,048 addresses)

• Fixed to 100.64.0.0/21

• IP range assigned to Pods in EKS for CNI Custom Networking

• No direct external connection, unique IP range only within the VPC

• May be expanded depending on the number and architecture of applications deployed on EKS

VPC CNI

For LB

/27 (32 addresses)

For Node

/26 (64 addresses)

For Pod

/21 (2,048 addresses)

• Fixed to 100.64.0.0/21

• Applied CNI Custom Networking

VPC CNI

For LB

/27 (32 addresses)

• General

/26 (64 addresses)

• When multiple LBs are required

For Node

/26 (64 addresses)

• General

/25 (128 addresses)

• Medium to large scale

• May vary depending on the customer's IP policy

• If more than 100 Worker Nodes are expected, need to expand to /24 or /23

For Pod

/21 (2,048 addresses)

• Fixed to 100.64.0.0/21

• Applied CNI Custom Networking

• May be expanded depending on the number and architecture of applications deployed on EKS

Kubenet

/25 (128 addresses)

Used for Node and LB. CIDR for Pods is set during AKS deployment.

(This range may vary depending on the customer's IP policy)

Azure CNI

/23 or larger

Determine and apply IP range considering architecture and deployment strategy of applications

Kubenet

/25 or larger (128 addresses)

Used for Node and LB. CIDR for Pods is set during AKS deployment.