About the OpenShift SDN network plugin

    OpenShift SDN provides three SDN modes for configuring the pod network:

    • Multitenant mode provides project-level isolation for pods and services. Pods from different projects cannot send packets to or receive packets from pods and services of a different project. You can disable isolation for a project, allowing it to send network traffic to all pods and services in the entire cluster and receive network traffic from those pods and services.

    • Subnet mode provides a flat pod network where every pod can communicate with every other pod and service. The network policy mode provides the same functionality as subnet mode.

    Supported network plugin feature matrix

    Red Hat OpenShift Networking offers two options for the network plugin, OpenShift SDN and OVN-Kubernetes, for the network plugin. The following table summarizes the current feature support for both network plugins:

    1. Egress router for OVN-Kubernetes supports only redirect mode.

    2. IPv6 is supported only on bare metal, IBM Power, and IBM zSystems clusters.