Enable OSPF on a routing instance; see To enable OSPF on a routing instance .

Create at least one OSPFv2 or OSPFv3 area; see To create an OSPF area .

Create an OSPF neighbor on an OmniSwitch as required; see To create an OSPF neighbor on an OmniSwitch .

Assign Layer 3 interfaces to the routers in the OSPFv2 or OSPFv3 area; see To add a Layer 3 interface to an OSPF router .

Create an OSPF area range as required; see To create an OSPF area range .

Create a virtual link between the backbone OSPF area and a remote OSPF area that does not advertise the OSPF topology as required; see To create a virtual link between OSPF areas .

Configure OSPF on a default routing instance or a VRF routing instance; see To configure OSPF on a default routing instance or a VRF routing instance .

Configure OSPF segment routing as required; see To configure OSPF segment routing.

Assign routers to the OSPFv2 or OSPFv3 area; see To add a router to an OSPF area .