Link state advertisement lsa, link state database lsdb, link state. Le datagramme ip le reassemblage du datagramme constitution des fragments. Check your routing tables to ensure these routes have propagated. Il ne prend en charge ni vlsm, ni le routage cidr classless interdomain routing. Les routeurs sur lesquels ospf est active vont chercher leurs voisins qui executent aussi ospf.
Tcpip environment fast convergence variablelength subnet masks discontiguous subnets incremental updates route authentication. Ospf in detail isp workshops last updated 29 october 20 1. Ospf employs a hierarchical network design using areas. Routage et reseaux ip cours routage et reseaux ip pdf, 1. Configuration dospf sur les routeurs supprimer toutes les routes statiques des routeurs no ip route 196. Ce paquet est comme une enveloppe qui contient plusieurs lsa lsack. Redistribute these static routes into the ospf process. Ospf adheres to the following link state characteristics. Ospf can do its work effectively only if all parties accept its facilitation. Open shortest path first ospf is a routing protocol developed for internet protocol ip networks by the interior gateway protocol igp working group of the internet engineering task force ietf. Ospf is a link state open standard based routing protocol.
Ospf network type nbma nonbroadcast multiple access uses only unicast communications, so it is the preferred way of ospf configuration in situations where multicast addressing is not possible or desirable for some reasons. We explain how ospf works, how ospf tables are built on an ospf enabled router and their purpose neighbour table, topology table, routing table, ospf areas and their importance. Hp deskjet 2, 25, 3630, 3635, 4720 ciss hp 63, 302, 123, 803. Next we cover ospf link state packet types used to exchange data between ospf routers. Par defaut, une interface ne peut appartenir qua une zone ospf.
Jun 28, 2017 it is time to take a look to configuring ospf open shortest path first with an ospf configuration example. In this article we will see how to configure ospf step by step. Open shortest path first open shortest path first ospf is an openstandard link state routing protocol. Link state routing protocols advertise the state of their links. The open shortest path first ospf protocol, defined in rfc 2328, is an interior gateway protocol used to distribute routing information within. The working group was formed in 1988 to design an igp based on the shortest path first spf algorithm for use in the internet. Ospf will form neighbor relationships with adjacent routers in the same area. Il utilise lalgorithme spf pour calculer le cout le plus bas vers une destination. Le process id est le numero du processus ospf qui est lance sur le routeur. Ospf suggests procedures for the consultation process, and explains and guides the parties through the process. Ospf neighbor discovery process use ip packet to send hello message. Once you are in the router ospf configuration submode, configure the lan network 172. Ce document examine le fonctionnement dospf et comment il peut etre.
The working group was formed in 1988 to design an igp based on the. Il est spcifi dans diffrentes normes du groupe ietf internet engineering task force. Ospf open shortest path first ospf is a standardized linkstate routing protocol, designed to scale efficiently to support larger networks. Configure ospf to summarize these redistributed routes into a single route. It implements dijkstras algorithm, also known as the shortest path first spf algorithm. Overview in lab 6 we discussed rip, which is the canonical example of a routing protocol built on the distancevector algorithm. Router 1 should be a asbr which redistributes the static routes. Une version 3 est definie dans le rfc 5340 qui permet lutilisation. Open shortest path first ospf is an igp developed by the ospf working group of the internet engineering task force ietf. It uses a link state routing lsr algorithm and falls into the group of interior gateway protocols igps, operating within a single autonomous system as. This tutorial explains how to configure ospf routing protocol step by step with practical example in packet tracer. Bower survival migration download survival migration pdf ebook survival migration survival migration ebook author by alexandra dobrowolsky survi. Since it is based on open standard, we can use it with any vendors router.
Toutes les commandes utilisees dans ce document ne sont pas specifiques a une version particuliere des systemes unix ou gnulinux. Comme mentionne precedemment, vous pouvez faire des recherches et trouver dautres cours attrayants pdf aussi. When a link state router begins operating on a network link, information associated with that logical network is added to its local link state database lsdb. Ce document examine le fonctionnement d ospf et comment il peut etre. Introduction au routage dynamique avec ospf cours en pdf.
Configuring ospf routing advanced lab continued ospf objectives. As a linkstate routing protocol it was based on the linkstate algorithm developed for the arpanet in 1980 and the isis routing protocol. Resume sur le cours introduction au routage dynamique avec ospf. Open shortest path first ospf was designed as an interior gateway protocol igp, for use in an autonomous system such as a local area network lan. Configuration dospfv2 et ospfv3 en cisco ios cisco. At start routers are at ospf down state use multicast address 224.
The ospf network command uses a combination of networkaddress and wildcardmask. Open shortest path first a routing protocol based on the linkstate algorithm objective the objective of this lab is to configure and analyze the performance of the open shortest path first ospf routing protocol. Les principales caracteristiques du protocole ospf sont les suivantes. It is time to take a look to configuring ospf open shortest path first with an ospf configuration example. Ospf also allows packet authentication and uses ip multicast when sendingreceiving packets. Il est bien plus complexe et destine plus pour les moyens ou grands reseaux.