OSPF

Open Shortest Path First (OSPF) is an interior gateway protocol (IGP) used to exchange routing information between routers within a single autonomous system (AS). OSPF calculates the best path based on true costs using a metric assigned by a network administrator. RIP, the oldest IGP protocol chooses the least-cost path based on hop count. OSPF is more efficient than RIP, has a quicker convergence, and provides equal-cost multipath routing where packets to a single destination can be sent using more than one interface. OSPF is suitable for complex networks with a large number of routers. It can coexist with RIP on a network.

Gaia supports OSPFv2, which supports IPv4 addressing, and OSPFv3, which supports IPv6 addressing. To learn about OSPFv3, see IPv6 OSPF.

You can run OSPF over a route-based VPN by enabling OSPF on a virtual tunnel interface (VTI).