GKE Dataplane V2 clusters running version 1.35.1-gke.1516000 or later now use CNI version 1.1.0 in the CNI configuration files.

GKE Dataplane V2 clusters running version 1.35.1-gke.1516000 or later now use CNI version 1.1.0 in the CNI configuration files. This change requires downstream CNI plugins to be compatible with CNI version 1.1.0.

Customers using self-managed open-source Istio or in-cluster unmanaged Cloud Service Mesh (CSM) variant must manually upgrade their CSM CNI version to 1.23 to ensure compatibility. If you use an incompatible CNI version, nodes might fail to reach a Ready state and might show NetworkPluginNotReady errors.