What is OSPF PPT?

What is OSPF PPT?

OSPF Open Shortest Path First is a link-state routing protocol that was developed in 1991. Read more. Respa Peter. OSPF Open Shortest Path First is a link-state routing protocol that was developed in 1991.

What are the 7 stages of OSPF?

OSPF routers go through the seven states, called Down, Attempt/Init, Two ways, Exstart, Exchange, Loading and full while building adjacency with other OSPF speaking routers.

What are the four 4 types of OSPF routers?

Four Types of OSPF Routers

  • Routers for internal use: Internal routers. Internal routers are routers that belong to the same OSPF region as their directly connected networks.
  • Area Borders Routers.
  • Autonomous Systems Boundary Routers.
  • Backbone Routers.

How OSPF works step by step?

Each OSPF router passes along information about the routes and costs they’ve heard about to all of their adjacent OSPF routers, called neighbors. OSPF routers rely on cost to compute the shortest path through the network between themselves and a remote router or network destination.

How many tables are there in OSPF?

three separate
The OSPF process builds and maintains three separate tables: • A neighbor table – contains a list of all neighboring routers. A topology table – contains a list of all possible routes to all known networks within an area. A routing table – contains the best route for each known network.

What are the OSPF area types?

There are five types of OSPF areas: Backbone area (area 0), Standard area, Stub area, Totally stubby area, and No so stubby area (NSSA).

What is the backbone area in OSPF?

An OSPF backbone area consists of all networks in area ID 0.0. 0.0, their attached routing devices, and all ABRs. The backbone itself does not have any ABRs. The backbone distributes routing information between areas.

What is OSPF function?

The OSPF (Open Shortest Path First) protocol is one of a family of IP Routing protocols, and is an Interior Gateway Protocol (IGP) for the Internet, used to distribute IP routing information throughout a single Autonomous System (AS) in an IP network.

What is OSPF configuration?

OSPF has some basic rules when it comes to area assignment. OSPF must be configured with areas. The backbone area 0, or 0.0. 0.0, must be configured if you use more than one area assignment. You can configure OSPF in one area; you can choose any area, although good OSPF design dictates that you configure area 0.

Why OSPF is used?

The main advantage of a link state routing protocol like OSPF is that the complete knowledge of topology allows routers to calculate routes that satisfy particular criteria. This can be useful for traffic engineering purposes, where routes can be constrained to meet particular quality of service requirements.

Why OSPF is called link-state?

OSPF is an Interior Gateway Protocol (IGP). In an OSPF network, routers or systems within the same area maintain an identical link-state database that describes the topology of the area.