Configuring the Built-in Subnets

Two built-in subnets are configured during Kube-OVN installation, as shown in Figure 1.

• Default subnet: default subnet used for allocating IP addresses to pods. The default CIDR is 10.16.0.0/16.
• Node subnet: special subnet for communication between nodes and pods. The default CIDR is 100.64.0.1/16.

Figure 1 Built-in subnets of Kube-OVN

During the installation, you can modify the Kube-OVN-Controller configuration in the kube-ovn.yaml file. Note that the two subnets cannot conflict with the CIDRs of the existing host network and service (SVC) network.