CCIE SP - OSPF Lab Topology 2 - Initial + Full Configs

Open Shortest Path First (OSPF) is a widely used link-state routing protocol that plays a crucial role in Service Provider (SP) networks for dynamic and efficient IP routing. Unlike distance-vector protocols, OSPF maintains a complete topology map, enabling fast convergence and optimal path selection.

In SP environments, OSPF is typically deployed as OSPFv2 for IPv4 and OSPFv3 for IPv6, with features like multi-area design, route summarization, and traffic engineering (TE) support to improve scalability. Service providers often integrate OSPF with MPLS, using it to distribute loop-free IP reachability while relying on LDP or RSVP-TE for label switching.

Understanding OSPF's behavior in large-scale networks, including LSA types, area types (Stub, NSSA), and SPF optimizations, is essential for building resilient and high-performance SP infrastructures.

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