We have to start somewhere so let’s look at the basics of configuring OSPF. Remember OSPF is an IGP (Interior Gateway Protocol) and allows packet authentication as well as IP multicast when sending and receiving updates. In this post we are configuring OSPF in a single area. Continue reading “Configuring OSPF – The Basics”
For today let’s discuss a routing protocol that was being thought of in 1987 by the Internet Engineering Task Force (IETF). OSPF currently has three versions and the first version was in the 1980s when the internet was still being used for research. What is interesting about the first version of OSPF is although one version ran on routers the other type of version ran on UNIX computers. When OSPFv2 come out in the 1990s the International Organization for Standardization (ISO) was working on another routing protocol called IS-IS (Intermediate System-to-Intermediate System). OSPF is considered to be an interior gateway protocol which is like IS-IS but unlike OSPF IS-IS runs on the data-link layer while OSPF runs at layer three the network layer.