Configure OVN gateways on the control plane or data plane to connect tenant networks to external networks.

Many environments have at least one OVN gateway. An environment might have more than one physical external network and more than one OVN gateway.

Some environments do not include an OVN gateway. For example, an environment might not have an OVN gateway because connectivity is not required, because the environment does not use centralized floating IPs or routers and workloads directly connected to provider networks, or because some other connection method is used.

You can choose where OVN gateways are configured. OVN gateway location choices include the following:

Control plane

OVN gateways on RHOCP worker nodes that host the OpenStack controller services. Place the OVN gateway on a dedicated NIC whose sole purpose is to provide an interface to the OVN gateway.

Data plane

OVN gateways on dedicated Networker nodes on the data plane.

Control plane OVN gateways can be subject to more disruption than data plane OVN gateways.