Introduction
This document briefly describes what OSPF is. The following describes differences between OSPF and RIP, OSPF fundamentals, and basic OSPF function configuration.
Overview of OSPF
Definition
The Open Shortest Path First (OSPF) protocol, developed by the Internet Engineering Task Force (IETF), is a link-state Interior Gateway Protocol (IGP).
At present, OSPF Version 2, defined in RFC 2328, is intended for IPv4, and OSPF Version 3, defined in RFC 2740, is intended for IPv6. Unless otherwise stated, OSPF stated in this document refers to OSPF Version 2.
OSPF was developed in the Internet community to introduce a highly functional non-proprietary IGP for the TCP/IP protocol family. The discussion of the creation of a common interoperable IGP for the Internet started in 1988 and was formalized until 1991. At that time the OSPF working group requested that OSPF be considered for the development of draft Internet standards.
OSPF is based on link-state technology, which is different from the distance-vector algorithm used in traditional Internet routing protocols such as the Routing Information Protocol (RIP). OSPF has introduced some new concepts, such as variable length subnet mask (VLSM) and route summarization.
The following describes differences between OSPF and RIP, OSPF fundamentals, and basic OSPF function configuration.
Comment
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