To enable OSPF on a Tier-0 Gateway within a VMware Cloud Foundation (VCF) or NSX environment, an administrator must define the areas where the gateway will participate and the specific interfaces it will use for peering.

Based on the NSX Manager configuration interface, the two required items to be configured are:

Area Definition: This is necessary to define the OSPF area (e.g., Area 0) the Tier-0 gateway will participate in.

OSPF Configured Interfaces: OSPF must be explicitly configured on the relevant uplink interfaces to establish neighbor relationships and exchange routing information with physical routers.