Amazon VPC CNI introduces Enhanced Subnet Discovery
Containers Blog
This article discusses a new feature introduced in Amazon VPC CNI called Enhanced Subnet Discovery, which helps address IPv4 address exhaustion in Amazon EKS clusters. It allows the VPC CNI to automatically discover and utilize additional subnets in the VPC that are tagged with "kubernetes.io/role/cni".
Specifically, the article covers:
- How Enhanced Subnet Discovery works and the prerequisites to use it
- A walkthrough demonstrating how to enable the feature and create new subnets with a secondary CIDR block to extend the VPC IP space
- Key considerations, such as shared subnets in cross-account scenarios, comparison with Custom Networking, and compatibility with other Pod networking use cases
- Conclusion highlighting the benefits of this feature in simplifying IP address management and supporting the dynamic needs of modern IT environments
The AWS News Feed is currently looking for gold sponsors. If you want to support the AWS community and reach a large audience of AWS professionals, consider sponsoring the AWS News Feed.
Related articles
Jul 15
2025
2025
Amazon VPC CNI now supports higher bandwidth and network performance per pod
Nov 20
2025
2025
Introducing Amazon VPC Regional NAT Gateway
Aug 15
2025
2025
Amazon VPC now supports IPv4 ingress routing for large IP Pools
Nov 21
2024
2024
Amazon CloudWatch Internet Monitor adds AWS Local Zones support for VPC subnets
The AWS News Feed is currently looking for silver sponsors. If you want to support the AWS community and reach a large audience of AWS professionals, consider sponsoring the AWS News Feed.