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OSPF: Anatomy of an Internet Routing Protocol by John T. Moy

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Chapter 3. Developing the OSPF Protocol

The development of the OSPF routing protocol began in 1987. OSPF was one of the first protocols to be developed completely within the Internet Engineering Task Force (IETF). A decade later, the lETF’s OSPF Working Group still exists, and the OSPF protocol continues to be extended, although the basic OSPF protocol was established with the first publication of the OSPF Version 2 (OSPFv2) specification in 1991.

Tracing OSPF development allows us to introduce the features of OSPF—not just what they are but also why they were considered important. Like the Internet, OSPF has evolved over time. Some current features of OSPF, such as the Point-to-MultiPoint interface, were never envisioned in the original OSPF design. ...

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