Tags » [OSPF]

OSPF - LSA Types

Today I am going to talk about OSPF and its LSA types. I hope you enjoy the post.

First of all I will give you a brief explanation of how OSPF works so we can go ahead and look at its LSA types. 922 more words


OSPF - E1, E2, N1 and N2 Routes

OSPF Route Types

E1 – These routes reflect the cost of the entire path, this is all the way from the local router to the destination router.   92 more words


OSPF - Route Redistribution and Introduction to Stub Areas

If you see in the routing table that a route has a “IA” next to the route it means OSPF inter area.  This means that the destination network is in an area which the local router does not have an interface in. 211 more words


OSPF Stub Areas

In a multi-area OSPF network, stub areas are basically used to provide scalability.   OSPF scalability is achieved by reducing the flooding domain using areas and reducing the size of the routing table doing summarization. 1,113 more words


OSPF - Router and LSA Types

Router types

Internal router – All of this routers interface is in a single area.

Backbone Routers – This router type must have at least one interface in area 0. 413 more words


OSPF -Adjacency States

OSPF Adjacency States

When OSPF neighbors are creating a neighbor relationship, they go through the following states:

Down: No hellos from the neighbor in question. 118 more words


OSPF - Interface Costs and Bandwidth Reference

OSPF – Routing Table

  • In the routing table you can see two numbers in square brackets, administrative distance and cost.
  • The  default cost for OSPF is 110.
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