The Origins of OSPF
The IETF, in response to the increased need for building larger and larger IP-based networks, formed a working group specifically to develop an open, link-state routing protocol for use in large, heterogeneous IP networks. This new routing protocol was based on the moderately successful series of proprietary, vendor-specific, Shortest Path First (SPF) routing protocols that had proliferated in the market. All SPF routing protocols, including the IETF's OSPF, were directly based on a mathematical algorithm known as the Dijkstra Algorithm. This algorithm enables the selection of routes based on link states as opposed to just distance vectors.
The IETF developed the OSPF routing protocol during the late 1980s. OSPF was, quite ...
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