The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release. Flannel Network

The Platform CLI configures a flannel network as the network fabric used for communications between Kubernetes pods. This overlay network uses VxLANs to facilitate network connectivity. For more information on flannel, see the upstream documentation at:

By default, the Platform CLI creates a network in the range to host this network. The Platform CLI provides an option to set the network range to an alternate range, if required, during installation. Systems in an Oracle Linux Cloud Native Environment deployment must not have any network devices configured for this reserved IP range.