Free Cisco OSPF routing course for 2026 — built for CCNA, CCNP Enterprise, and CCIE candidates by a Triple CCIE. Get a complete grasp of OSPF: overview, neighbor states, Router-ID selection, DR/BDR election, network types, LSAs (Type 1–7), areas (backbone, stub, totally stubby, NSSA), authentication, route summarization, virtual links, default route injection, metric tuning, and troubleshooting. Includes hands-on Cisco OSPF labs you can replicate in EVE-NG/GNS3/Packet Tracer. Perfect free starter path before enrolling in the full CCNA 200-301 or CCNP ENCOR/ENARSI tracks. Network Engineer roles requiring OSPF skills pay $70K–$130K USD globally. Free lifetime access. Enroll today and master Cisco OSPF routing fundamentals.