Specifically, the purpose of this guide is to examine the ospf database in various environments. In this article we will look at the stub area, totally stub, nssa not so stubby and totally nssa. This page is reflect of my studies for ccnp and not for professional use. Ospfs interaction with frame relay will be explained in another section broadcast multiaccess indicates a topology where broadcast occurs. Box 94062 900 north third street baton rouge, louisiana 708049062. Ospf uses a lsdb link state database and fills this with lsas link state advertisement. Ospf lsa types purpose and function of every ospf lsa. One jigsaw is nothing but all of them together give us the total picturefor ospf this is the lsdb. Ospf neighbor states explained with example ospf routers go through the seven states, called down, attemptinit, two ways, exstart, exchange, loading and full while building adjacency with other ospf speaking routers. Lsa types 1 and 2 are found in all areas, and are never flooded outside of an area. This guide shows sample configurations of open shortest path first ospf in different network environments. What is the difference between ospf lsa types 5 and 7. Louisiana state legislature legislative law table of. I like to visualize ospf lsas as jigsaw puzzle pieces.
External attribute lsa for bgp for many people it helps to visualize things in order to understand and remember. Lsa type 1 router lsa packets are sent between routers within the same area of origin and do not leave the area. If you experience any technical difficulties navigating this website, click here to contact the webmaster. Lsa is layered scalable architecture and helps in designing and implementing various layers in the bw system for data acquisition, data distribution and data analysis. Whether the other types of lsas are advertised within an area depends on the area type, and there are many. Instead of using 1 lsa packet ospf has many different types of lsas and in this tutorial im going to show all of them to you. An ospf router uses lsa type 1 packets to describe its own interfaces but also carries information about its neighbors to adjacent routers in the same area. Worth noting that abrs also pass on type 5 lsas but will also include a type 4 when sending it out of its area. I just skimmed rfc 5250 and rfc 2370 but could not get the real world usage and how to set up. This video is about what is ospf lsa type 1 link of lab video s.
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